Sciences and Exploration Directorate

Natchimuthuk Gopalswamy

(RSCH AST, SOLAR & SOLAR TRSTRL STD)

Natchimuthuk Gopalswamy's Contact Card & Information.
Email: natchimuthuk.gopalswamy-1@nasa.gov
Phone: 301.286.5885
Org Code: 671
Address:
NASA/GSFC
Mail Code 671
Greenbelt, MD 20771
Employer:
NASA

Missions & Projects

Brief Bio


  Dr. Nat Gopalswamy is a staff scientist at the Heliophysics Division of NASA’s Goddard Space Flight Center, Greenbelt, Maryland. He holds the position of Astrophysicist in the Solar Physics Laboratory. Before joining NASA, he had held the positions of Research Professor at the Catholic University of America and Associate Research Scientist position at the University of Maryland, College Park. He was a Senior Resident Research Associate of the National Research Council at the Goddard Space Flight Center (1998-2000). He was briefly (1983-1985) the Resident Scientist of the Kodaikanal Observatory. Dr. Gopalswamy received his PhD from the Indian Institute of Science, Bangalore (1982) and did his post-doctoral training at the University of Maryland, College Park (1985). He was conferred with a Doctor Honoris Causa by the Bulgarian Academy of Sciences in 2019. Dr. Gopalswamy is an AGU Fellow.


 Over the past two decades, Dr. Gopalswamy has been engaged in solving problems in solar and solar terrestrial physics using data from various large radio telescopes and space missions. In particular, he is interested in coronal mass ejections and their impact on Earth and on the heliosphere in the form of magnetic storms and particle radiation. He has considerable expertise in the analysis of multi-wavelength data (X-ray, EUV, optical and radio). In the recent years, he has been extensively involved in the analys is of Yohkoh, SOHO, STEREO, SDO, Wind and ACE data in conjunction with radio and optical images obtained by ground based instruments. He is a member of the SOHO and STEREO teams engaged in studying coronal mass ejections using coronagraph and in-situ data from Wind and ACE. He has authored or co-authored more than 450 papers.


 Some of the notable discoveries of Dr. Gopalswamy: Radio CME (1992), Umbral oscillations in microwaves (1993), transient microwave brightenings (1995), three-part CME using non-coronagraphic observations (1996), Effective interplanetary acceleration of CMEs (2000), CME Cannibalism (2001), High-latitude CMEs and solar polarity reversal (2003), Effect of CME interaction on SEP intensity (2004), Empirical shock arrival model (2005), Geoeffectiveness of halo CMEs (2007), High-speed radio-quiet CMEs (2008), CME Deflection by coronal holes (2009), Radio-quiet interplanetary shocks (2010), Heliospheric magnetic field from white-light shock structure (2011), Relation between polar magnetic field strength and microwave brightness (2012), Latitudinal connectivity in GLE events (2013), Anomalous expansion of CMEs in Solar Cycle 24 (2014), The peculiar behavior of halo CMEs (2015), Hierarchical relationship between CME kinematics and spectral hardness of SEP events (2016), Reconstruction of CME flux ropes from eruption data (2018), Relation between durations of sustained gamma-ray emission and interplanetary type II radio bursts from the Sun (2018), Correlation between CME speed and gamma-ray fluence (2019), Clustering of sustained gamma-ray emission events (2019), Spatially-extended gamma-ray source due to particles in shock sheaths (2020), Heliospheric state revealed by height of halo CME formation (2020),. First measurement of temperature and flow speed of electrons in the solar wind formation region using coronagraphy (2021), Unusual rotation of a CME flux rope (2022), halo CMEs and solar cycle strength (2023).

Positions/Employment


Astrophysicist

NASA - Goddard Space Flight Center

January 2002 - Present


Senior Research Associate, National Research Council, National Academy of Sciences

National Academy of Sciences - NASA Goddard Space Flight Center

1998 - 2000

Worked on the relation between coronal mass ejections and solar Radio bursts


Research Professor

The Catholic University of America - NASA Goddard Space Flight Center

1997 - January 2002


Associate Research Scientist

University of Maryland - College Park

1993 - 1997

Worked on solar radio physics


Assistant Research Scientist

University of Maryland - College Park

1989 - 1993

worked on radio bursts and coronal mass ejections


Research Associate

University of Maryland - College Park

1985 - 1989

Worked on data from the Clark Lake Multi-frequency radioheliograph


Resident Scientist

Indian Institute of Astrophysics - Kodaikanal Solar Observatory

1984 - 1985

Administered the operations of the Kodaikanal Solar Observatory



Visiting Scientist

Indian Institute of Astrophysics - Bengaluru

1982 - 1984

Worked low frequency radio physics of the Sun

Education


·      Ph.D. (Physics) Indian Institute of Science (1982)

·      M.Sc. (Physics), PSG College of Arts and Science, University of Madras (1977)

·      B.Sc. (Physics), PSG College of Arts and Science, University of Madras (1975)

Professional Societies


American Geophysical Union (AGU)

Member

1986 - Present


American Astronomical Society (AAS)

member

1986 - Present


• Asia Oceania Geosciences Society (AOGS)

Member, Distinguished Lecturer, Session convener

2004 - Present


• Astronomical Society of India (ASI)

Life Member

1983 - Present


• International Astronomical Union (IAU)

Member, commission chair

1985 - Present


• Japan Geophysical Union (JpGU)

member

2011 - Present

Awards


·      G. Ramaswamy Naidu Memorial Prize, University of Madras, 1977

·      Prof. P. E. Subramani Ayyar Commemoration Medal, University of Madras, 1977

·      Dr. K. S. Krishnan Gold Medal, University of Madras, 1977

·      Dr. K.S. Krishnan Memorial Prize, University of Madras, 1977

·      Jagirdar of Arni Medal, University of Madras, 1977

·      Fellow of the Science and Technology Agency of Japan, 1996

·      Senior Research Associate, US National Academy of Sciences 1998 – 2000

·      NASA GSFC NATIONAL RESOURCE Group Achievement Award, 2000

·      NASA GSFC Solar System Exploration Division Peer Award, 2006

·      NASA Goddard Space Flight Center Special Act Award in recognition of superior service, 2006

·      NASA GSFC New Business Capture Award, 2006

·      Robert H. Goddard Honor Award for Science 2008

·      AOGS Distinguished Lecturer, 2010

·      NASA GSFC Heliophysics Division Peer Award, 2012

·      NASA Outstanding Leadership Medal, 2013

·      American Geophysical Union Fellow 2016

·      NASA’s John C. Lindsay Memorial Award for Space Science 2017

·      AGU/SPA Richard Carrington Award 2019

·      Doctor Honoris Causa, Bulgarian Academy of Sciences, 2019

. Lifetime achievement award, Elavenil-Indian Science and Technology Association, 2021

·      NASA Group Achievement Award – BITSE mission, 2022

. URSI Senior Member, 2022

. Fellow of the International Science Council, 2022

Professional Service


·      Member, NASA’s Living with a Star (LWS) Science Definition Team (2003)

·      Organizer, Coordinated Data Analysis Workshops (1998 – present)

·      Director, CDAW Data Center (2002 – present)

·      Associate editor of Journal of Geophysical Research (Space Physics) (2000-2006)

·      Associate editor of Geophysical Research Letters (2007-2010)

·      Scientific Editor of Sun and Geosphere (2006 – present)

·      Workshop Coordinator and Steering Committee Member of the NSF SHINE program (2003-2005)

·      Member of NASA’s Sun-Solar System Connection Roadmap committee (2005)

·      International Coordinator, International Heliophysical Year (IHY) 2007 program (2002-2009)

·      Director of International Coordination, International Space Weather Initiative (2009-2013)

·      Executive Director, International Space Weather Initiative (2013-present)

·      Member of the Organizing Committee of IAU Commission 10 (1997-2009)

·      Member of the Organizing Committee of IAU Commission 49 (2006-2009)

·      Bureau Member, Scientific Committee on Solar Terrestrial Physics (SCOSTEP) (2006-2011)

·      President of IAU commission 49 (2009-2012)

·      Leader of NASA outreach team to Melaka Planetarium (2010)

·      Leader of NASA outreach team to Coimbatore Space Festival (2012)

·      Member, NASA’s Living with a Star (LWS) Steering Committee (2013)

·      President, SCOSTEP (2011-2019)

. Past President, SCOSTEP (2019-)

·      Delegate to the United Nations Committee On Peaceful Uses of Outer Space (2012 - 2019)

·      Vice chair of COSPAR Panel on Space Weather (2021 - )

. U.S. National Adherent Representative to SCOSTEP (2021-)

·      Served on numerous review panels to select proposals for federal funding

·      Served as convener or co-convener of numerous sessions at the AGU, IAU, AOGS, and COSPAR assemblies

·      Participated in the external review of international research institutions

·      Directed several International Space Science Schools for graduate students and postdocs since 2007 in Brazil, China, India, Slovakia, Egypt, Ethiopia, Nigeria, Indonesia, Kenya, Peru, and Azerbaijan

·      Organized several Space Weather workshops since 2005 in collaboration with the United Nations Office of Outer Space Affairs (UNOOSA) to promote deployment of low-cost space weather instruments in developing countries.

·      Conducted three COSPAR Capacity Building workshops in solar terrestrial science (2018-2020) that trained scores of students from developing countries in utilizing space data publicly available from past and current space missions.

Publications


Refereed

2024. "The multiview observatory for solar terrestrial science (MOST)." Journal of Atmospheric and Solar-Terrestrial Physics 254 106165 [10.1016/j.jastp.2023.106165] [Journal Article/Letter]

2023. "Investigating a Solar Wind Stream Interaction Region using Interplanetary Spacecraft Radio Signals: A Magnetohydrodynamic Simulation Study." The Astrophysical Journal 955 (2): 90 [10.3847/1538-4357/acedac] [Journal Article/Letter]

2023. "The Faraday Effect Tracker of Coronal and Heliospheric Structures (FETCH) instrument." Frontiers in Astronomy and Space Sciences 10 1064069 [10.3389/fspas.2023.1064069] [Journal Article/Letter]

2022. "The Sun and Space Weather." Atmosphere 13 (11): 1781 [10.3390/atmos13111781] [Journal Article/Letter]

2022. "Effect of the Heliospheric State on CME Evolution." The Astrophysical Journal 936 (2): 122 [10.3847/1538-4357/ac8744] [Journal Article/Letter]

2022. "What Is Unusual About the Third Largest Geomagnetic Storm of Solar Cycle 24?." Journal of Geophysical Research: Space Physics 127 (8): e2022JA030404 [10.1029/2022ja030404] [Journal Article/Letter]

2022. "Modeling the East‐West Asymmetry of Energetic Particle Fluence in Large Solar Energetic Particle Events Using the iPATH Model." Journal of Geophysical Research: Space Physics 127 (6): e2022JA030343 [10.1029/2022ja030343] [Journal Article/Letter]

2022. "The Relation between Type III Radio Storms and CIR Energetic Particles." 2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) [10.23919/at-ap-rasc54737.2022.9814336] [Proceedings]

2022. "Can Type III Radio Storms be a Source of Seed Particles to Shock Acceleration?." 2022 3rd URSI Atlantic and Asia Pacific Radio Science Meeting (AT-AP-RASC) [10.23919/at-ap-rasc54737.2022.9814233] [Proceedings]

2022. "Study of the Mass-loss Rate from the Sun." The Astrophysical Journal 930 (1): 74 [10.3847/1538-4357/ac4fcb] [Journal Article/Letter]

2022. "Interhemispheric Asymmetries in Ionospheric Electron Density Responses During Geomagnetic Storms: A Study Using Space‐Based and Ground‐Based GNSS and AMPERE Observations." Journal of Geophysical Research: Space Physics 127 (5): [10.1029/2021ja030247] [Journal Article/Letter]

2022. "PARTICLE ACCELERATION AND TRANSPORT AT THE SUN INFERRED FROM FERMI/LAT OBSERVATIONS OF > 100 MEV GAMMA-RAYS." 18th Annual Meeting of the Asia Oceania Geosciences Society, World Scientific Publishing Company 189-191 [10.1142/9789811260100_0064] [Proceedings]

2022. "Modern Faraday Rotation Studies to Probe the Solar Wind." Frontiers in Astronomy and Space Sciences 9 id 841866 [10.3389/fspas.2022.841866] [Journal Article/Letter]

2022. "Eruption of the EUV Hot Channel from the Solar Limb and Associated Moving Type IV Radio Burst." The Astrophysical Journal 927 (1): 108 [10.3847/1538-4357/ac4dfe] [Journal Article/Letter]

2022. "Periodic Oscillations in LASCO Coronal Mass Ejection Speeds: Space Seismology." The Astrophysical Journal Letters 927 (1): L16 [10.3847/2041-8213/ac54b0] [Journal Article/Letter]

2022. "Solar activity and space weather." Journal of Physics: Conference Series 2214 (1): 012021 [10.1088/1742-6596/2214/1/012021] [Journal Article/Letter]

2022. "Arrival Time Estimates of Earth-Directed CME-Driven Shocks." Solar Physics 297 (1): 3 [10.1007/s11207-021-01914-1] [Journal Article/Letter]

2021. "Predictability of variable solar–terrestrial coupling." Annales Geophysicae 39 (6): 1013-1035 [10.5194/angeo-39-1013-2021] [Journal Article/Letter]

2021. "The Structural Connection between Coronal Mass Ejection Flux Ropes near the Sun and at 1 au." The Astrophysical Journal 922 (1): 64 [10.3847/1538-4357/ac23cc] [Journal Article/Letter]

2021. "Spotless days and geomagnetic index as the predictors of solar cycle 25." Research in Astronomy and Astrophysics 21 (9): 215 [10.1088/1674-4527/21/9/215] [Journal Article/Letter]

2021. "Earth-affecting solar transients: a review of progresses in solar cycle 24." Progress in Earth and Planetary Science 8 (1): 56 [10.1186/s40645-021-00426-7] [Journal Article/Letter]

2021. "Total Solar Irradiance Variability on the Evolutionary Timescale and its Impact on the Earth’s Mean Surface Temperature." The Astrophysical Journal 917 (2): 86 [10.3847/1538-4357/ac0894] [Journal Article/Letter]

2021. "The Common Origin of High-energy Protons in Solar Energetic Particle Events and Sustained Gamma-Ray Emission from the Sun." The Astrophysical Journal 915 (2): 82 [10.3847/1538-4357/ac004f] [Journal Article/Letter]

2021. "A Quarter Century of Wind Spacecraft Discoveries." Reviews of Geophysics 59 (2): e2020RG000714 [10.1029/2020rg000714] [Journal Article/Letter]

2021. "Investigating Width Distribution of Slow and Fast CMEs in Solar Cycles 23 and 24." Frontiers in Astronomy and Space Sciences 8 [10.3389/fspas.2021.634358] [Journal Article/Letter]

2021. "Imaging and Spectral Observations of a Type-II Radio Burst Revealing the Section of the CME-Driven Shock That Accelerates Electrons." Solar Physics 296 (4): 62 [10.1007/s11207-021-01810-8] [Journal Article/Letter]

2021. "On the Connection between Solar Surface Magnetic Flux and the Total Solar Irradiance." The Astrophysical Journal 907 (1): 39 [10.3847/1538-4357/abcbf3] [Journal Article/Letter]

2021. "The Balloon-Borne Investigation of Temperature and Speed of Electrons in the Corona (BITSE): Mission Description and Preliminary Results." Solar Physics 296 (1): 15 [10.1007/s11207-020-01751-8] [Journal Article/Letter]

2021. "Properties of High-Frequency Type II Radio Bursts and Their Relation to the Associated Coronal Mass Ejections." Solar Physics 296 (1): 27 [10.1007/s11207-020-01743-8] [Journal Article/Letter]

2020. "Intercycle and Intracycle Variation of Halo CME Rate Obtained from SOHO/LASCO Observations." The Astrophysical Journal 903 (2): 118 [10.3847/1538-4357/abb887] [Journal Article/Letter]

2020. "The Energetic Particle Detector." Astronomy & Astrophysics 642 A7 [10.1051/0004-6361/201935287] [Journal Article/Letter]

2020. "A Quarter Century of Wind Spacecraft Discoveries." Reviews of Geophysics [Full Text] [10.1002/essoar.10504309.1] [Journal Article/Letter]

2020. "A catalog of prominence eruptions detected automatically in the SDO/AIA 304 Å images." Journal of Atmospheric and Solar-Terrestrial Physics 205 105324 [10.1016/j.jastp.2020.105324] [Journal Article/Letter]

2020. "Diffuse Interplanetary Radio Emission from a Polar Coronal Mass Ejection." 2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science [10.23919/ursigass49373.2020.9232000] [Proceedings]

2020. "A Weak Fermi Gamma-ray Event Associated with a Halo CME and a Type II Radio Burst." 2020 XXXIIIrd General Assembly and Scientific Symposium of the International Union of Radio Science 1-4 [10.23919/ursigass49373.2020.9232363] [Proceedings]

2020. "The State of the Heliosphere Revealed by Limb-halo Coronal Mass Ejections in Solar Cycles 23 and 24." The Astrophysical Journal Letters 897 (1): L1 [10.3847/2041-8213/ab9b7b] [Journal Article/Letter]

2020. "A Modified Spheromak Model Suitable for Coronal Mass Ejection Simulations." The Astrophysical Journal 894 (1): 49 [10.3847/1538-4357/ab845f] [Journal Article/Letter]

2020. "Positron Processes in the Sun." Atoms 8 (2): 14 [10.3390/atoms8020014] [Journal Article/Letter]

2020. "ICME Evolution in the Inner Heliosphere." Solar Physics 295 (4): 61 [10.1007/s11207-020-01624-0] [Journal Article/Letter]

2020. "A Catalog of Type II radio bursts observed by Wind/WAVES and their Statistical Properties." Sun and Geosphere 14 (2): 111-121 [10.31401/sungeo.2019.02.03] [Journal Article/Letter]

2020. "The Shock-Driving Capability of a CME Inferred from Multiwavelength Observations." [10.31401/sungeo.2019.02.02] [Journal Article/Letter]

2020. "Space, time and velocity association of successive coronal mass ejections." Astronomy & Astrophysics 635 A112 [10.1051/0004-6361/201936016] [Journal Article/Letter]

2020. "Source of Energetic Protons in the 2014 September 1 Sustained Gamma-ray Emission Event." Solar Physics 295 (2): 18 [10.1007/s11207-020-1590-8] [Journal Article/Letter]

2020. "A Study of the Observational Properties of Coronal Mass Ejection Flux Ropes near the Sun." The Astrophysical Journal 889 (2): 104 [10.3847/1538-4357/ab620f] [Journal Article/Letter]

2020. "An Observationally Constrained Analytical Model for Predicting the Magnetic Field Vectors of Interplanetary Coronal Mass Ejections at 1 au." The Astrophysical Journal 888 (2): 121 [10.3847/1538-4357/ab5fd7] [Journal Article/Letter]

2020. "Diffuse Interplanetary Radio Emission: Shock Emission or a Type III Storm?." URSI Radio Science Letters 2 1-5 [10.46620/20-0049] [Journal Article/Letter]

2019. "On the Shock Source of Sustained Gamma-Ray Emission from the Sun." Journal of Physics: Conference Series 1332 (1): 012004 [10.1088/1742-6596/1332/1/012004] [Journal Article/Letter]

2019. "Statistical Survey of Coronal Mass Ejections and Interplanetary Type II Bursts." The Astrophysical Journal 882 (2): 92 [10.3847/1538-4357/ab3345] [Journal Article/Letter]

2019. "Are Solar Energetic Particle Events and Type II Bursts Associated with Fast and Narrow Coronal Mass Ejections?." Solar Physics 294 (9): 134 [10.1007/s11207-019-1518-3] [Journal Article/Letter]

2019. "Direct Estimates of the Solar Coronal Magnetic Field Using Contemporaneous Extreme-ultraviolet, Radio, and White-light Observations." The Astrophysical Journal 881 (1): 24 [10.3847/1538-4357/ab2adf] [Journal Article/Letter]

2019. "Statistical Study on Multispacecraft Widespread Solar Energetic Particle Events During Solar Cycle 24." Journal of Geophysical Research: Space Physics 124 (8): 6384-6402 [10.1029/2019ja026832] [Journal Article/Letter]

2019. "Impact of space weather on climate and habitability of terrestrial-type exoplanets." International Journal of Astrobiology 19 (2): 136-194 [10.1017/s1473550419000132] [Journal Article/Letter]

2019. "On the Coronal Mass Ejection Detection Rate during Solar Cycles 23 and 24." The Astrophysical Journal 880 (1): 51 [10.3847/1538-4357/ab26a7] [Journal Article/Letter]

2019. "Global Energetics of Solar Flares. VII. Aerodynamic Drag in Coronal Mass Ejections." The Astrophysical Journal 877 (2): 149 [10.3847/1538-4357/ab1b39] [Journal Article/Letter]

2019. "Explicit IMF B y ‐Effect Maximizes at Subauroral Latitudes (Dedicated to the Memory of Eigil Friis‐Christensen)." Journal of Geophysical Research: Space Physics 2018JA026285 [10.1029/2018ja026285] [Journal Article/Letter]

2019. "Simulating Solar Coronal Mass Ejections Constrained by Observations of Their Speed and Poloidal Flux." The Astrophysical Journal 875 (2): L17 [10.3847/2041-8213/ab14e9] [Journal Article/Letter]

2019. "Fermi, Wind, and SOHO Observations of Sustained Gamma-Ray Emission from the Sun." 2019 URSI Asia-Pacific Radio Science Conference (AP-RASC) [10.23919/ursiap-rasc.2019.8738168] [Proceedings]

2019. "Properties of DH Type II Radio Bursts and Their Space Weather Implications." 2019 URSI Asia-Pacific Radio Science Conference (AP-RASC) [10.23919/ursiap-rasc.2019.8738714] [Proceedings]

2018. "Interplanetary Type II Radio Bursts from Wind /WAVES and Sustained Gamma-Ray Emission from Fermi /LAT: Evidence for Shock Source." The Astrophysical Journal 868 (2): L19 [10.3847/2041-8213/aaef36] [Journal Article/Letter]

2018. "Very narrow coronal mass ejections producing solar energetic particles." Astronomy & Astrophysics 619 A34 [10.1051/0004-6361/201833237] [Journal Article/Letter]

2018. "Sun-to-earth propagation of the 2015 June 21 coronal mass ejection revealed by optical, EUV, and radio observations." Journal of Atmospheric and Solar-Terrestrial Physics 179 225-238 [10.1016/j.jastp.2018.07.013] [Journal Article/Letter]

2018. "Coronal flux ropes and their interplanetary counterparts." Journal of Atmospheric and Solar-Terrestrial Physics 180 35-45 [10.1016/j.jastp.2017.06.004] [Journal Article/Letter]

2018. "Direction-finding Analysis of the 2012 July 6 Type II Solar Radio Burst at Low Frequencies." The Astrophysical Journal 867 (1): 40 [10.3847/1538-4357/aae2b6] [Journal Article/Letter]

2018. "A small satellite mission for solar coronagraphy." CubeSats and NanoSats for Remote Sensing II [10.1117/12.2323807] [Proceedings]

2018. "Dependence of Coronal Mass Ejection Properties on Their Solar Source Active Region Characteristics and Associated Flare Reconnection Flux." The Astrophysical Journal 865 (1): 4 [10.3847/1538-4357/aada10] [Journal Article/Letter]

2018. "Long-term solar activity studies using microwave imaging observations and prediction for cycle 25." Journal of Atmospheric and Solar-Terrestrial Physics 176 26-33 [10.1016/j.jastp.2018.04.005] [Journal Article/Letter]

2018. "The Effects of Uncertainty in Initial CME Input Parameters on Deflection, Rotation, B z , and Arrival Time Predictions." Journal of Geophysical Research: Space Physics 123 (9): 7220-7240 [10.1029/2018ja025780] [Journal Article/Letter]

2018. "Extreme Kinematics of the 2017 September 10 Solar Eruption and the Spectral Characteristics of the Associated Energetic Particles." The Astrophysical Journal 863 (2): L39 [10.3847/2041-8213/aad86c] [Journal Article/Letter]

2018. "Coronal mass ejections as a new indicator of the active Sun." Proceedings of the International Astronomical Union 13 (S340): 95-100 [10.1017/s1743921318001527] [Journal Article/Letter]

2017. "A Sun-to-Earth Analysis of Magnetic Helicity of the 2013 March 17–18 Interplanetary Coronal Mass Ejection." The Astrophysical Journal 851 (2): 123 [10.3847/1538-4357/aa9983] [Journal Article/Letter]

2017. "Using the Coronal Evolution to Successfully Forward Model CMEs' In Situ Magnetic Profiles." Journal of Geophysical Research: Space Physics 122 (12): 11,810-11,834 [10.1002/2017ja024541] [Journal Article/Letter]

2017. "Prominence Eruption Initiated by Helical Kink Instability of an Embedded Flux Rope." The Astrophysical Journal 850 (1): 38 [10.3847/1538-4357/aa9020] [Journal Article/Letter]

2017. "Toward a Next Generation Solar Coronagraph: Development of a Compact Diagnostic Coronagraph on the ISS." Journal of Korean Astronomical Society 50 (5): 139-149 [10.5303/JKAS.2017.50.5.139] [Journal Article/Letter]

2017. "A Hierarchical Relationship between the Fluence Spectra and CME Kinematics in Large Solar Energetic Particle Events: A Radio Perspective." Journal of Physics: Conference Series 900 012009 [10.1088/1742-6596/900/1/012009] [Journal Article/Letter]

2017. "CME Velocity and Acceleration Error Estimates Using the Bootstrap Method." Solar Physics 292 (8): 114 [10.1007/s11207-017-1143-y] [Journal Article/Letter]

2017. "Comparison of the coronal mass ejection shock acceleration of three widespread SEP events during solar cycle 24." Journal of Geophysical Research: Space Physics 122 (7): 7021-7041 [10.1002/2017ja024218] [Journal Article/Letter]

2017. "A New Technique to Provide Realistic Input to CME Forecasting Models." Proceedings of the International Astronomical Union 13 (S335): 258-262 [10.1017/s1743921317011048] [Journal Article/Letter]

2017. "New Evidence for a Coronal Mass Ejection-driven High Frequency Type II Burst near the Sun." The Astrophysical Journal 843 (1): 10 [10.3847/1538-4357/aa72e7] [Journal Article/Letter]

2017. "Deflection and Rotation of CMEs from Active Region 11158." Solar Physics 292 (6): 78 [10.1007/s11207-017-1098-z] [Journal Article/Letter]

2017. "Estimation of Reconnection Flux Using Post-eruption Arcades and Its Relevance to Magnetic Clouds at 1 AU." Solar Physics 292 (4): 65 [10.1007/s11207-017-1080-9] [Journal Article/Letter]

2017. "Replacing the polarizer wheel with a polarization camera to increase the temporal resolution and reduce the overall complexity of a solar coronagraph." Journal of Astronomical Telescopes, Instruments, and Systems 3 (1): 014001 [10.1117/1.jatis.3.1.014001] [Journal Article/Letter]

2017. "Predicting the Magnetic Field of Earth-impacting CMEs." The Astrophysical Journal 835 (2): 117 [10.3847/1538-4357/835/2/117] [Journal Article/Letter]

2016. "The 2012 July 23 Backside Eruption: An Extreme Energetic Particle Event?." The Astrophysical Journal 833 (2): 216 [10.3847/1538-4357/833/2/216] [Journal Article/Letter]

2016. "CONSTRAINING THE SOLAR CORONAL MAGNETIC FIELD STRENGTH USING SPLIT-BAND TYPE II RADIO BURST OBSERVATIONS." The Astrophysical Journal 832 (1): 59 [10.3847/0004-637x/832/1/59] [Journal Article/Letter]

2016. "Statistical Analysis of Periodic Oscillations in LASCO Coronal Mass Ejection Speeds." Solar Physics 291 (12): 3751-3764 [10.1007/s11207-016-1000-4] [Journal Article/Letter]

2016. "Erratum to: Dynamics of CMEs in the LASCO Field of View." Solar Physics 291 (12): 3869-3869 [10.1007/s11207-016-1005-z] [Journal Article/Letter]

2016. "Coronal magnetic field profiles from shock‐CME standoff distances." Journal of Geophysical Research: Space Physics 121 (10): 9299-9315 [10.1002/2016ja022956] [Journal Article/Letter]

2016. "On the reduced geoeffectiveness of solar cycle 24: A moderate storm perspective." Journal of Geophysical Research: Space Physics 121 (9): 8188-8202 [10.1002/2016ja022885] [Journal Article/Letter]

2016. "SOURCE REGIONS OF THE TYPE II RADIO BURST OBSERVED DURING A CME–CME INTERACTION ON 2013 MAY 22." The Astrophysical Journal 827 (2): 141 [10.3847/0004-637x/827/2/141] [Journal Article/Letter]

2016. "A study of the 2012 January 19 complex type II radio burst using wind, SOHO, and STEREO observations." 2016 URSI Asia-Pacific Radio Science Conference (URSI AP-RASC) [10.1109/ursiap-rasc.2016.7601386] [Proceedings]

2016. "Solar activity studies using microwave imaging observations." 2016 URSI Asia-Pacific Radio Science Conference (URSI AP-RASC) [10.1109/ursiap-rasc.2016.7601382] [Proceedings]

2016. "Low-frequency radio bursts and space weather." 2016 URSI Asia-Pacific Radio Science Conference (URSI AP-RASC) [10.1109/ursiap-rasc.2016.7601368] [Proceedings]

2016. "On the directivity of low-frequency type IV radio bursts." 2016 URSI Asia-Pacific Radio Science Conference (URSI AP-RASC) [10.1109/ursiap-rasc.2016.7601385] [Proceedings]

2016. "A small mission concept to the Sun–Earth Lagrangian L5 point for innovative solar, heliospheric and space weather science." Journal of Atmospheric and Solar-Terrestrial Physics 146 171-185 [10.1016/j.jastp.2016.06.004] [Journal Article/Letter]

2016. "Energy dependence of SEP electron and proton onset times." Journal of Geophysical Research: Space Physics 121 (7): 6168-6183 [10.1002/2015ja021422] [Journal Article/Letter]

2016. "UNUSUAL POLAR CONDITIONS IN SOLAR CYCLE 24 AND THEIR IMPLICATIONS FOR CYCLE 25." The Astrophysical Journal 823 (1): L15 [10.3847/2041-8205/823/1/l15] [Journal Article/Letter]

2016. "The radial speed‐expansion speed relation for Earth‐directed CMEs." Space Weather 14 (5): 368-378 [10.1002/2015sw001335] [Journal Article/Letter]

2016. "MINIFILAMENT ERUPTIONS THAT DRIVE CORONAL JETS IN A SOLAR ACTIVE REGION." The Astrophysical Journal 821 (2): 100 [10.3847/0004-637x/821/2/100] [Journal Article/Letter]

2016. "History and development of coronal mass ejections as a key player in solar terrestrial relationship." Geoscience Letters 3 (1): 8 [10.1186/s40562-016-0039-2] [Journal Article/Letter]

2016. "CME flux rope and shock identifications and locations: Comparison of white light data, Graduated Cylindrical Shell model, and MHD simulations." Journal of Geophysical Research: Space Physics 121 (3): 1886-1906 [10.1002/2015ja021805] [Journal Article/Letter]

2016. "Special issue “International CAWSES-II Symposium”." Earth Planet Sp 68 (1): 26 [10.1186/s40623-016-0392-6] [Journal Article/Letter]

2016. "Two Exceptions in the Large SEP Events of Solar Cycles 23 and 24." Solar Physics 291 (2): 513-530 [10.1007/s11207-015-0830-9] [Journal Article/Letter]

2015. "CMEs during the Two Activity Peaks in Cycle 24 and their Space Weather Consequences." Sun and Geosphere 10 111-118 [Journal Article/Letter]

2015. "Properties and geoeffectiveness of magnetic clouds during solar cycles 23 and 24." Journal of Geophysical Research: Space Physics 120 (11): 9221-9245 [10.1002/2015ja021446] [Journal Article/Letter]

2015. "Advancing the understanding of the Sun–Earth interaction—the Climate and Weather of the Sun–Earth System (CAWSES) II program." Progress in Earth and Planetary Science 2 (1): 28 [10.1186/s40645-015-0059-0] [Journal Article/Letter]

2015. "High-energy solar particle events in cycle 24." Journal of Physics: Conference Series 642 012012 [10.1088/1742-6596/642/1/012012] [Journal Article/Letter]

2015. "Low-Frequency Type-II Radio Detections and Coronagraph Data Employed to Describe and Forecast the Propagation of 71 CMEs/Shocks." Solar Physics 290 (9): 2455-2478 [10.1007/s11207-015-0776-y] [Journal Article/Letter]

2015. "KINEMATIC AND ENERGETIC PROPERTIES OF THE 2012 MARCH 12 POLAR CORONAL MASS EJECTION." The Astrophysical Journal 809 (1): 106 [10.1088/0004-637x/809/1/106] [Journal Article/Letter]

2015. "DIVISION E COMMISSION 49: INTERPLANETARY PLASMA AND HELIOSPHERE." Proceedings of the International Astronomical Union 11 (T29A): 300-315 [10.1017/s1743921316000818] [Journal Article/Letter]

2015. "Filament Eruptions Outside of Active Regions as Sources of Large Solar Energetic Particle Events." 34th International Cosmic Ray Conference (ICRC2015) 34 48 [Proceedings]

2015. "Short-term variability of the Sun-Earth system: an overview of progress made during the CAWSES-II period." Progress in Earth and Planetary Science 2 (1): 13 [10.1186/s40645-015-0043-8] [Journal Article/Letter]

2015. "LARGE SOLAR ENERGETIC PARTICLE EVENTS ASSOCIATED WITH FILAMENT ERUPTIONS OUTSIDE ACTIVE REGIONS." The Astrophysical Journal 806 (1): 8 [10.1088/0004-637x/806/1/8] [Journal Article/Letter]

2015. "THE PECULIAR BEHAVIOR OF HALO CORONAL MASS EJECTIONS IN SOLAR CYCLE 24." The Astrophysical Journal 804 (1): L23 [10.1088/2041-8205/804/1/l23] [Journal Article/Letter]

2015. "Dynamics of CMEs in the LASCO Field of View." Solar Physics 290 (3): 903-917 [10.1007/s11207-015-0653-8] [Journal Article/Letter]

2015. "Estimating the Height of CMEs Associated with a Major SEP Event at the Onset of the Metric Type II Radio Burst during Solar Cycles 23 and 24." The Astrophysical Journal 806 (1): 13. [Journal Article/Letter]

2014. "The Dynamics of Eruptive Prominences." Astrophysics and Space Science Library 381-410 [10.1007/978-3-319-10416-4_15] [Article in Book]

2014. "Latitudinal Connectivity of Ground Level Enhancement Events." Outstanding Problems in Heliophysics: From Coronal Heating to the Edge of the Heliosphere 484 63 [Proceedings]

2014. "An Estimate of the Coronal Magnetic Field near a Solar Coronal Mass Ejection from Low-frequency Radio Observations." The Astrophysical Journal 795 [14-10.1088/0004-637X/795/1/14] [Journal Article/Letter]

2014. "Ground Level Enhancement in the 2014 January 6 Solar Energetic Particle Event." The Astrophysical Journal 790 [LL13-10.1088/2041-8205/790/1/L13] [Journal Article/Letter]

2014. "Homologous flare-CME events and their metric type II radio burst association." Advances in Space Research 54 1941-1948 [10.1016/j.asr.2014.07.002] [Journal Article/Letter]

2014. "Coronal Mass Ejections and Non-recurrent Forbush Decreases." Solar Physics 289 3949-3960 [10.1007/s11207-014-0534-6] [Journal Article/Letter]

2014. "Two-step forecast of geomagnetic storm using coronal mass ejection and solar wind condition." Space Weather 12 246-256 [10.1002/2014SW001033] [Journal Article/Letter]

2014. "Anomalous expansion of coronal mass ejections during solar cycle 24 and its space weather implications." Geophysical Research Letters 41 2673-2680 [10.1002/2014GL059858] [Journal Article/Letter]

2014. "Major solar eruptions and high-energy particle events during solar cycle 24." Earth, Planets, and Space 66 104 [Full Text] [10.1186/1880-5981-66-104] [Journal Article/Letter]

2014. "The Relation Between Large-Scale Coronal Propagating Fronts and Type II Radio Bursts." Solar Physics 289 4589-4606 [10.1007/s11207-014-0602-y] [Journal Article/Letter]

2014. "Do Solar Coronal Holes Affect the Properties of Solar Energetic Particle Events?." Solar Physics 289 657-673 [10.1007/s11207-013-0427-0] [Journal Article/Letter]

2014. "Multiwavelength diagnostics of the precursor and main phases of an M1.8 flare on 2011 April 22." Monthly Notices of the Royal Astronomical Society 437 2249-2262 [10.1093/mnras/stt2032] [Journal Article/Letter]

2013. "DIVISION II: COMMISSION 49: INTERPLANETARY PLASMA AND THE HELIOSPHERE." Proceedings of the International Astronomical Union 10 (T28B): 112-114 [10.1017/s1743921315005542] [Journal Article/Letter]

2013. "The International Space Weather Initiative (ISWI)." SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS 11 327-329 [10.1002/swe.20048] [Journal Article/Letter]

2013. "Understanding shock dynamics in the inner heliosphere with modeling and type II radio data: A statistical study." JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 118 4711-4723 [10.1002/jgra.50444] [Journal Article/Letter]

2013. "The International Space Weather Initiative(ISWI)." Space Weather 11 327-329 [10.1002/swe.20048] [Journal Article/Letter]

2013. "Flux emergence, flux imbalance, magnetic free energy and solar flares." Advances in Space Research 52 1561-1566 [10.1016/j.asr.2013.07.009] [Journal Article/Letter]

2013. "A Study of Coronal Holes Observed by SoHO/EIT and the Nobeyama Radioheliograph." Publications of the Astronomical Society of Japan 65 15 [Journal Article/Letter]

2013. "Solar energetic particle events during the rise phases of solar cycles 23 and 24." Advances in Space Research 52 2102-2111 [10.1016/j.asr.2013.09.006] [Journal Article/Letter]

2013. "A multiwavelength study of eruptive events on January 23, 2012 associated with a major solar energetic particle event." Advances in Space Research 52 1-14 [10.1016/j.asr.2013.03.009] [Journal Article/Letter]

2013. "Obscuration of Flare Emission by an Eruptive prominence." Publications of the Astronomical Society of Japan 65 11 [Journal Article/Letter]

2013. "Testing the empirical shock arrival model using quadrature observations." Space Weather 11 661-669 [10.1002/2013SW000945] [Journal Article/Letter]

2013. "Obscuration of Flare Emission by an Eruptive rominence." Publications of the Astronomical Society of Japan 65 11 [Journal Article/Letter]

2013. "Effect of CME interactions on SEP intensity: modeling the 2012 March-07 SEP event with ENLIL." AAS/Solar Physics Division Meeting 44 #.1.25- [Journal Article/Letter]

2013. "Near-Sun Flux-Rope Structure of CMEs." Solar Physics 284 (1): 47-58 [10.1007/s11207-012-0209-0] [Journal Article/Letter]

2013. "Understanding shock dynamics in the inner heliosphere with modeling and type II radio data: A statistical study." J. Geophys. Res. Space Physics 118 (8): 4711-4723 [10.1002/jgra.50444] [Journal Article/Letter]

2013. "Preface." Solar Physics 284 (1): 1-4 [10.1007/s11207-013-0280-1] [Journal Article/Letter]

2013. "Comparison of Helicity Signs in Interplanetary CMEs and Their Solar Source Regions." Solar Physics 284 (1): 105-127 [10.1007/s11207-013-0224-9] [Journal Article/Letter]

2013. "Coronal Hole Influence on the Observed Structure of Interplanetary CMEs." Solar Physics 8 [10.1007/s11207-012-0211-6] [Journal Article/Letter]

2013. "Erratum: "Behavior of Solar Cycles 23 and 24 Revealed by Microwave Observations"." The Astrophysical Journal Letters 763 (1): L24 [10.1088/2041-8205/763/1/L24] [Journal Article/Letter]

2013. "The Solar Connection of Enhanced Heavy Ion Charge States in the Interplanetary Medium: Implications for the Flux-Rope Structure of CMEs." Solar Physics 284 (1): 17-46 [10.1007/s11207-012-0215-2] [Journal Article/Letter]

2013. "Implications of Mass and Energy Loss due to Coronal Mass Ejections on Magnetically Active Stars." The Astrophysical Journal 764 170 [10.1088/0004-637X/764/2/170] [Journal Article/Letter]

2013. "A High-frequency Type II Solar Radio Burst Associated with the 2011 February 13 Coronal Mass Ejection." The Astrophysical Journal 765 148 [10.1088/0004-637X/765/2/148] [Journal Article/Letter]

2013. "Post-Eruption Arcades and Interplanetary Coronal Mass Ejections." Solar Physics 33 [10.1007/s11207-013-0248-1] [Journal Article/Letter]

2013. "Propagation Characteristics of CMEs Associated with Magnetic Clouds and Ejecta." Solar Physics 26 [10.1007/s11207-013-0230-y] [Journal Article/Letter]

2013. "The First Ground Level Enhancement Event of Solar Cycle 24: Direct Observation of Shock Formation and Particle Release Heights." The Astrophysical Journal Letters 765 (2): L30 [10.1088/2041-8205/765/2/L30] [Journal Article/Letter]

2012. "A Study of the 12 June 2010 C61/SF flare associated with a CME; surge and energetic particles." 39th COSPAR Scientific Assembly 39 2026 [Proceedings]

2012. "Division II: Sun and Heliosphere." Transactions of the International Astronomical Union Series A ( 28): 61-68 [10.1017/S1743921312002669] [Proceedings]

2012. "Multi-wavelength diagnostics of thermal and non-thermal sources in the 22 April 2011 flare event." 39th COSPAR Scientific Assembly 39 75 [Proceedings]

2012. "Factors affecting the intensity of solar energetic particle events." American Institute of Physics Conference Series 1436 247-252 [10.1063/1.4723615] [Proceedings]

2012. "Commission 49: Interplanetary Plasma and Heliosphere." Transactions of the International Astronomical Union Series A ( 28): 95-124 [10.1017/S1743921312002694] [Proceedings]

2012. "Solar Energetic Particle Events and Associated CMEs during the Rising Phases of Solar Cycle 23 and 24 - A Comparative study." 39th COSPAR Scientific Assembly 39 303 [Proceedings]

2012. "Magnetic Flux Imbalance in Active Regions NOAA 11283 and NOAA 11302." 39th COSPAR Scientific Assembly 39 334 [Proceedings]

2012. "Global Cooperation in the Capacity Building Activities on Sun-Earth Connection Studies." 39th COSPAR Scientific Assembly 39 650 [Proceedings]

2012. "The 3-D structure of CMEs as Inferred from Coronagraph Observations." 39th COSPAR Scientific Assembly 39 649 [Proceedings]

2012. "Inferences on the Behavior of Solar Cycle 24 from the Polar Coronal Hole Enhancement and the Rate of Prominence Eruptions Observed by the Nobeyama Radioheliograph." 39th COSPAR Scientific Assembly 39 651 [Proceedings]

2012. "A Global View of the Energetic Solar Eruptions during 2012 January 19-27." 39th COSPAR Scientific Assembly 39 652 [Proceedings]

2012. "Height of Shock Formation in the Solar Corona Inferred from Observations of Type II Radio Bursts and Coronal Mass Ejections." 39th COSPAR Scientific Assembly 39 653 [Proceedings]

2012. "On the Oscillatory and Non-oscillatory Loop Systems and Dynamical Processes during the X21 Solar Flare on 06 September 2011." 39th COSPAR Scientific Assembly 39 1882 [Proceedings]

2012. "Coronal Mass Ejections and Type II Radio Bursts from Active Region 11158." 39th COSPAR Scientific Assembly 39 2205 [Proceedings]

2012. "Energetic particle and other space weather events of solar cycle 24." American Institute of Physics Conference Series 1500 14-19 [10.1063/1.4768738] [Proceedings]

2012. "Coronal Magnetic Field Measurement from EUV Images Made by the Solar Dynamics Observatory." The Astrophysical Journal 744 72 [10.1088/0004-637X/744/1/72] [Journal Article/Letter]

2012. "The relation between coronal holes and coronal mass ejections during the rise, maximum, and declining phases of Solar Cycle 23." J. Geophys. Res. 117 (A1): A01103 [10.1029/2011JA016589] [Journal Article/Letter]

2012. "Comparison of Dst forecast models for intense geomagnetic storms." Journal of Geophysical Research (Space Physics) 117 3209 [10.1029/2011JA016872] [Journal Article/Letter]

2012. "Magnetic Field Strength in the Upper Solar Corona Using White-light Shock Structures Surrounding Coronal Mass Ejections." The Astrophysical Journal 746 118 [10.1088/0004-637X/746/2/118] [Journal Article/Letter]

2012. "Understanding shock dynamics in the inner heliosphere with modeling and Type II radio data: The 2010-04-03 event." Journal of Geophysical Research (Space Physics) 117 4105 [10.1029/2011JA017304] [Journal Article/Letter]

2012. "Erratum: Relation Between Type II Bursts and CMEs Inferred from STEREO Observations." Solar Physics 277 459 [10.1007/s11207-011-9918-z] [Journal Article/Letter]

2012. "Coronal mass ejection–driven shocks and the associated sudden commencements/sudden impulses." J. Geophys. Res. 117 (A4): A04210 [10.1029/2011JA017216] [Journal Article/Letter]

2012. "Behavior of Solar Cycles 23 and 24 Revealed by Microwave Observations." The Astrophysical Journal 750 L42 [10.1088/2041-8205/750/2/L42] [Journal Article/Letter]

2012. "Deflections of Fast Coronal Mass Ejections and the Properties of Associated Solar Energetic Particle Events." The Astrophysical Journal 754 100 [10.1088/0004-637X/754/2/100] [Journal Article/Letter]

2012. "The Location of Solar Metric Type II Radio Bursts with Respect to the Associated Coronal Mass Ejections." The Astrophysical Journal 39 1549 [Proceedings]

2012. "Radio-loud CMEs from the disk center lacking shocks at 1 AU." Journal of Geophysical Research (Space Physics) 117 8106 [10.1029/2012JA017610] [Journal Article/Letter]

2012. "Dependence of solar proton events on their associated activities: Coronal mass ejection parameters." J. Geophys. Res. 117 (A8): A08108 [10.1029/2011JA017477] [Journal Article/Letter]

2012. "The Relationship Between the Expansion Speed and Radial Speed of CMEs Confirmed Using Quadrature Observations of the 2011 February 15 CME." Sun and Geosphere 7 7 [Journal Article/Letter]

2012. "Determination of the Heliospheric Radial Magnetic Field from the Standoff Distance of a CME-driven Shock Observed by the STEREO Spacecraft." The Astrophysical Journal 758 118 [10.1088/0004-637X/758/2/118] [Journal Article/Letter]

2012. "Preface." Space Science Reviews 171 1 [10.1007/s11214-012-9934-9] [Journal Article/Letter]

2012. "Properties of Ground Level Enhancement Events and the Associated Solar Eruptions During Solar Cycle 23." Space Science Reviews 171 23 [Full Text] [10.1007/s11214-012-9890-4] [Journal Article/Letter]

2011. "CME Parameter Input to ENLIL: LASCO halo cone versus STEREO measurements." AGU Fall Meeting Abstracts 2046- [Journal Article/Letter]

2011. "Type II Radio Bursts as an Indicator of CME Location." AGU Fall Meeting Abstracts 2047- [Journal Article/Letter]

2011. "CME Parameter Input to ENLIL: LASCO halo cone versus STEREO measurements." AGU Fall Meeting Abstracts 2046- [Journal Article/Letter]

2011. "Understanding Shock Dynamics in the Inner Heliosphere with Modeling and Type II Radio Data: the 2010-04-03 event." AGU Fall Meeting Abstracts 2050- [Journal Article/Letter]

2011. "Heliocentric Distance of Coronal Mass Ejections at the Time of Energetic Particle Release: Revisiting the Ground Level experiments and instrumentation." International Cosmic Ray Conference 10 157 [Proceedings]

2011. "Coronal mass ejections and their heliospheric consequences." Astronomical Society of India Conference Series 2 241-258 [Proceedings]

2011. "The International Space Weather Initiative (ISWI)." The Sun, the Solar Wind, and the Heliosphere 375-379 [Article in Book]

2011. "Universal Heliophysical Processes." The Sun, the Solar Wind, and the Heliosphere 9-20 [Article in Book]

2011. "Low-frequency type III radio bursts and solar energetic particle events." Central European Astrophysical Bulletin 35 71-82 [Journal Article/Letter]

2011. "Observing Solar Radio Bursts from the Lunar Surface." Planetary (Solar and Heliospher): 541-550 [Journal Article/Letter]

2011. "Coronal Mass Ejections and Solar Radio Emissions." Planetary (Solar and Heliospher): 325-342 [Journal Article/Letter]

2011. "Mukul Ranjan Kundu." Physics Today 64 040000 [Full Text] [10.1063/1.3580501] [Journal Article/Letter]

2011. "The Strength and Radial Profile of the Coronal Magnetic Field from the Standoff Distance of a Coronal Mass Ejection-driven Shock." The Astrophysical Journal 736 L17 [10.1088/2041-8205/736/1/L17] [Journal Article/Letter]

2011. "Effects of Refraction on Angles and Times of Arrival of Solar Radio Bursts." The Astrophysical Journal 734 16 [10.1088/0004-637X/734/1/16] [Journal Article/Letter]

2011. "Energetic storm particle events in coronal mass ejection-driven shocks." Journal of Geophysical Research (Space Physics) 116 8101 [10.1029/2011JA016683] [Journal Article/Letter]

2011. "The Brazilian decimetric array and space weather." Journal of Atmospheric and Solar-Terrestrial Physics 73 1300-1310 [10.1016/j.jastp.2010.09.009] [Journal Article/Letter]

2011. "United Nations Basic Space Science Initiative: 2010 Status Report on the International Space Weather Initiative." Sun and Geosphere 6 7 [Journal Article/Letter]

2011. "Relation Between the 3D-Geometry of the Coronal Wave and Associated CME During the 26 April 2008 Event." Solar Physics 273 421 [10.1007/s11207-011-9746-1] [Proceedings]

2011. "The Radio Observatory on the Lunar Surface for Solar studies." Advances in Space Research 48 (12): 1942-1957 [10.1016/j.asr.2011.07.006] [Journal Article/Letter]

2011. "Maximum Coronal Mass Ejection Speed as an Indicator of Solar and Geomagnetic Activities." The Astrophysical Journal 727 44 [Full Text] [10.1088/0004-637X/727/1/44] [Journal Article/Letter]

2011. "Earth-Affecting Solar Causes Observatory (EASCO): A potential International Living with a Star Mission from Sun-Earth L5." Journal of Atmospheric and Solar-Terrestrial Physics 73 658-663 [Full Text] [10.1016/j.jastp.2011.01.013] [Proceedings]

2010. "Opportunities for Ionospheric Science as Part of the International Space Weather Initiative (ISWI) (Invited)." AGU Fall Meeting Abstracts 1- [Journal Article/Letter]

2010. "Statistical Study of Solar Activity Associated with SOHO UVCS Coronal Mass Ejections." AGU Fall Meeting Abstracts 1838- [Journal Article/Letter]

2010. "Understanding Interplanetary Shock Dynamics in the Inner Heliosphere with New Observations and Modeling Techniques: Case studies on the 2010-04-03 and 2010-08-01 events." AGU Fall Meeting Abstracts 1858- [Journal Article/Letter]

2010. "Understanding Interplanetary Shock Dynamics in the Inner Heliosphere with New Observations and Modeling Techniques." AGU Fall Meeting Abstracts 1850- [Journal Article/Letter]

2010. "Radio-Loud Coronal Mass Ejections without Shocks near Earth." AGU Fall Meeting Abstracts A7- [Journal Article/Letter]

2010. "Corona Mass Ejections: a Summary of Recent Results." 20th National Solar Physics Meeting 108-130 [Proceedings]

2010. "Expansion speed of Coronal Mass Ejections ." EGU General Assembly Conference Abstracts 12 5142 [Proceedings]

2010. "International Space Weather Initiative (ISWI)." 20th National Solar Physics Meeting 160 [Proceedings]

2010. "Estimation of coronal magnetic field using the type II radio burst associated with a fast CME." 38th COSPAR Scientific Assembly 38 1808 [Proceedings]

2010. "The International Space Weather Initiative." 38th COSPAR Scientific Assembly 38 4192 [Proceedings]

2010. "Investigating the relation between Coronal Holes and CMEs during the Rise and Maximum and Declining Phases of the Solar Cycle 23." 38th COSPAR Scientific Assembly 38 1918 [Proceedings]

2010. "Prediction of the interplanetary Coronal Mass Ejection and it's associated shock by using neural network." 38th COSPAR Scientific Assembly 38 1905 [Proceedings]

2010. "Heliophysical Processes." Heliophysical Processes (Edited by N Gopalswamy; S Hasan; and A Ambastha) Astrophysics and Space Science Proceedings; 282 pages; ISBN: 978-3-642-11340-6; 2010 [10.1007/978-3-642-11341-3] [Proceedings]

2010. "Large-Scale Solar Eruptions." Heliophysical Processes (Edited by N Gopalswamy; S Hasan; and A Ambastha) Astrophysics and Space Science Proceedings; 282 pages; ISBN: 978-3-642-11340-6; 2010 53 53 [10.1007/978-3-642-11341-3_4] [Proceedings]

2010. "The CME link to geomagnetic storms." IAU Symposium 264 326-335 [Full Text] [Proceedings]

2010. "Coronal Mass Ejections from Sunspot and Non-Sunspot Regions." Magnetic Coupling between the Interior and Atmosphere of the Sun 289-307 [10.1007/978-3-642-02859-5_24] [Proceedings]

2010. "Interplanetary Shocks Lacking Type II Radio Bursts." The Astrophysical Journal 710 1111-1126 [10.1088/0004-637X/710/2/1111] [Journal Article/Letter]

2010. "Solar Sources of 'Driverless' Interplanetary Shocks." Twelfth International Solar Wind Conference 1216 452-458 [10.1063/1.3395902] [Journal Article/Letter]

2010. "Quasi-Periodic Oscillations in Lasco Coronal Mass Ejection Speeds." The Astrophysical Journal 708 450-455 [10.1088/0004-637X/708/1/450] [Journal Article/Letter]

2010. "Radioheliograph Observations of Metric Type II Bursts and the Kinematics of Coronal Mass Ejections." The Astrophysical Journal 712 188-193 [10.1088/0004-637X/712/1/188] [Journal Article/Letter]

2010. "Long-duration Low-frequency Type III Bursts and Solar Energetic Particle Events." The Astrophysical Journal 721 L62-L66 [10.1088/2041-8205/721/1/L62] [Journal Article/Letter]

2010. "Large Geomagnetic Storms Associated with Limb Halo Coronal Mass Ejections." Advances in Geosciences - Volume 21: Solar Terrestrial (ST) 21 71 [Journal Article/Letter]

2010. "A Catalog of Halo Coronal Mass Ejections from SOHO." Sun and Geosphere 5 7-16 [Journal Article/Letter]

2009. "Properties of Solar Active Regions and Their Relationship with Solar Eruption: a Statistical Study." AAS/Solar Physics Division Meeting #40 40 #09.20- [Journal Article/Letter]

2009. "Recent STEREO Observations of Coronal Mass Ejections." AGU Fall Meeting Abstracts A1491- [Journal Article/Letter]

2009. "Coronal mass ejections and space weather." Climate and Weather of the Sun-Earth System (CAWSES) Selected Papers from the 2007 Kyoto Symposium Edited by T Tsuda; R Fujii; K Shibata; and MA Geller Tokyo: TERRAPUB 2009 [77-120] [Proceedings]

2009. "Commission 49: Interplanetary Plasma and Heliosphere." Transactions of the International Astronomical Union Series A ( 27): 124-144 [10.1017/S1743921308025374] [Journal Article/Letter]

2009. "Putting the “I” in IHY: The United Nations Report for the International Heliophysical Year 2007." Putting the “I” in IHY: The United Nations Report for the International Heliophysical Year 2007 (edited by Barbara J Thompson; Natchimuthuk Gopalswamy; Joseph M Davila and Hans J Haubold) ISBN 978-3-211-99179-4 Published by Springer Dordrecht The Netherlands [Proceedings]

2009. "Universal Heliophysical Processes." IAU Symposium 257 [Journal Article/Letter]

2009. "Universal processes in heliophysics." IAU Symposium 257 11-16 [10.1017/S1743921309029032] [Proceedings]

2009. "Major solar flares without coronal mass ejections." IAU Symposium 257 283-286 [10.1017/S174392130902941X] [Proceedings]

2009. "Statistical relationship between solar flares and coronal mass ejections." IAU Symposium 257 233-243 [10.1017/S1743921309029342] [Proceedings]

2009. "Universal Heliophysical Processes (IAU S257)." Universal Heliophysical Processes (IAU S257)( by Natchimuthukonar Gopalswamy; David F Webb; Cambridge; UK: Cambridge University Press; 2009 [Proceedings]

2009. "SEPs and CMEs during cycle 23." IAU Symposium 257 475-477 [10.1017/S174392130902972X] [Proceedings]

2009. "Modeling and prediction of fast CME/shocks associated with type II bursts." IAU Symposium 257 489-491 [10.1017/S1743921309029755] [Proceedings]

2009. "The Expansion and Radial Speeds of Coronal Mass Ejections." Central European Astrophysical Bulletin 33 115-124 [Journal Article/Letter]

2009. "EUV Wave Reflection from a Coronal Hole." The Astrophysical Journal 691 (2): L123-L127 [10.1088/0004-637X/691/2/L123] [Journal Article/Letter]

2009. "CME interactions with coronal holes and their interplanetary consequences." Journal of Geophysical Research (Space Physics) 114 0 [10.1029/2008JA013686] [Journal Article/Letter]

2009. "Introduction to special section on Large Geomagnetic Storms." Journal of Geophysical Research (Space Physics) 114 0 [10.1029/2008JA014026] [Journal Article/Letter]

2009. "Evolution of the anemone AR NOAA 10798 and the related geo-effective flares and CMEs." Journal of Geophysical Research (Space Physics) 114 0 [10.1029/2008JA013291] [Journal Article/Letter]

2009. "The SOHO/LASCO CME Catalog." Earth Moon and Planets 104 295-313 [10.1007/s11038-008-9282-7] [Journal Article/Letter]

2009. "Preface to the Proceedings of the European General Assembly and the United Nations Workshop." Earth Moon and Planets 104 139-140 [10.1007/s11038-008-9278-3] [Journal Article/Letter]

2009. "Erratum to “Solar sources and geospace consequences of interplanetary magnetic clouds observed during solar cycle 23—Paper 1” [J. Atmos. Sol.-Terr. Phys. 70(2-4) (2008) 245-253]." Journal of Atmospheric and Solar-Terrestrial Physics 71 1005-1009 [10.1016/j.jastp.2008.10.016] [Journal Article/Letter]

2009. "Halo coronal mass ejections and geomagnetic storms." Earth Planets and Space [Full Text] [61] [Journal Article/Letter]

2009. "Relation Between Type II Bursts and CMEs Inferred from STEREO Observations." Solar Physics 259 227-254 [10.1007/s11207-009-9382-1] [Journal Article/Letter]

2009. "On the Origin, 3D Structure and Dynamic Evolution of CMEs Near Solar Minimum." Solar Physics 259 (1-2): 143-161 [10.1007/s11207-009-9422-x] [Journal Article/Letter]

2009. "Expansion Speed of Coronal Mass Ejections." Solar Physics 260 401-406 [10.1007/s11207-009-9464-0] [Journal Article/Letter]

2008. "Type II Radio Emission and Solar Energetic Particle Events." American Institute of Physics Conference Series 1039 196-202 [10.1063/1.2982445] [Proceedings]

2008. "Origin of Geoeffective Coronal Mass Ejections during Solar Cycle 23." 37th COSPAR Scientific Assembly 37 1057 [Proceedings]

2008. "Spatial Relationship between Solar Flares and Coronal Mass Ejections." The Astrophysical Journal 673 1174-1180 [10.1086/524927] [Journal Article/Letter]

2008. "Solar sources and geospace consequences of interplanetary magnetic clouds observed during solar cycle 23." Journal of Atmospheric and Solar-Terrestrial Physics 70 245-253 [10.1016/j.jastp.2007.08.070] [Journal Article/Letter]

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2008. "Average Thickness of Magnetosheath Upstream of Magnetic Clouds at 1 AU versus Solar Longitude of Source." Solar Physics 248 125-139 [10.1007/s11207-007-9111-6] [Journal Article/Letter]

2008. "Space Weather Application Using Projected Velocity Asymmetry of Halo CMEs." Solar Physics 248 113-123 [10.1007/s11207-008-9126-7] [Journal Article/Letter]

2008. "Coronal mass ejections, type II radio bursts, and solar energetic particle events in the SOHO era." Annales Geophysicae 26 3033-3047 [10.5194/angeo-26-3033-2008] [Journal Article/Letter]

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2008. "Comment on 'Prediction of the 1-AU arrival times of CME-associated interplanetary shocks: Evaluation of an empirical interplanetary shock propagation model'." Journal of Geophysical Research (Space Physics) 113 10105 [10.1029/2008JA013030] [Journal Article/Letter]

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2006. "Coronal mass ejections and space weather." Proceedings of the ILWS Workshop 71 [Proceedings]

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2006. "Observational Properties of CMEs from a Decade-Long Observations by SOHO." SOHO-17 10 Years of SOHO and Beyond 617 [Proceedings]

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2006. "Mission Concepts for Spacecraft and Lunar-based Radio Source Imaging at Frequencies below the Ionospheric Cutoff." IAU Joint Discussion 12 [Proceedings]

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2006. "IHY/UNBSS Program: Success Stories." 2nd UN/NASA Workshop on International Heliophysical Year and Basic Space Science [Proceedings]

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2006. "Solar Eruptions and Energetic Particles." Washington DC American Geophysical Union Geophysical Monograph Series 165 10.1029/GM165 [Journal Article/Letter]

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2006. "On the Rates of Coronal Mass Ejections: Remote Solar and In Situ Observations." The Astrophysical Journal 647 648-653 [10.1086/505383] [Journal Article/Letter]

2006. "Coronal Mass Ejections of Solar Cycle 23." Journal of Astrophysics and Astronomy 27 243-254 [10.1007/BF02702527] [Journal Article/Letter]

2006. "Different Power-Law Indices in the Frequency Distributions of Flares with and without Coronal Mass Ejections." The Astrophysical Journal 650 L143-L146 [10.1086/508876] [Journal Article/Letter]

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2005. "Solar Imaging Radio Array (SIRA): a multispacecraft mission." Proc. SPIE 5659, Enabling Sensor and Platform Technologies for Spaceborne Remote Sensing 5659 284-292 [10.1117/12.578736] [Proceedings]

2005. "A Study of the Drift Rate of Type II Radio Bursts at Different Wavelengths." Solar Wind 11/SOHO 16; Connecting Sun and Heliosphere 592 393 [Proceedings]

2005. "The Solar Imaging Radio Array: Space-Based Imaging of Solar; Heliospheric; Magnetospheric; and Astrophysical Sources at Frequencies below the Ionospheric Cutoff." From Clark Lake to the Long Wavelength Array: Bill Erickson's 345 476 [Proceedings]

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2005. "Flare-generated shock evolution and geomagnetic storms during the 'Halloween 2003 epoch': 29 October to 2 November." Journal of Geophysical Research (Space Physics) 110 9 [10.1029/2005JA011011] [Journal Article/Letter]

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2004. "Estimation of solar wind speed within 20Rs of the Sun by using limb CMEs." 35th COSPAR Scientific Assembly 35 1632 [Proceedings]

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2004. "Variability of solar eruptions during cycle 23." Advances in Space Research 34 391-396 [10.1016/j.asr.2003.10.054] [Journal Article/Letter]

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2004. "Influence of coronal mass ejection interaction on propagation of interplanetary shocks." Journal of Geophysical Research (Space Physics) 109 6109 [10.1029/2003JA010300] [Journal Article/Letter]

2004. "Arrival time of halo coronal mass ejections in the vicinity of the Earth." Astronomy and Astrophysics 423 729-736 [10.1051/0004-6361:20047184] [Journal Article/Letter]

2004. "Kinematics of coronal mass ejections between 2 and 30 solar radii. What can be learned about forces governing the eruption?." Astronomy and Astrophysics 423 717-728 [10.1051/0004-6361:20047169] [Journal Article/Letter]

2004. "Energy partition in two solar flare/CME events." Journal of Geophysical Research (Space Physics) 109 10104 [10.1029/2004JA010571] [Journal Article/Letter]

2004. "Intensity variation of large solar energetic particle events associated with coronal mass ejections." Journal of Geophysical Research (Space Physics) 109 12105 [10.1029/2004JA010602] [Journal Article/Letter]

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2003. "Low frequency radio astronomy from space: the Solar Radio Imaging Array." EGS - AGU - EUG Joint Assembly 12863 [Proceedings]

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2003. "The Solar Radio Imaging Array (SIRA) microsatellite mission." EGS - AGU - EUG Joint Assembly 12917 [Proceedings]

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2003. "Properties of narrow coronal mass ejections observed with LASCO." Advances in Space Research 32 2631-2635 [10.1016/j.asr.2003.03.018] [Journal Article/Letter]

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2003. "Coronal mass ejections: Initiation and detection." Advances in Space Research 31 869-881 [10.1016/S0273-1177(02)00888-8] [Journal Article/Letter]

2003. "A New Method for Estimating Widths, Velocities, and Source Location of Halo Coronal Mass Ejections." The Astrophysical Journal 584 472-478 [10.1086/345526] [Journal Article/Letter]

2003. "A numerical study on the acceleration and transit time of coronal mass ejections in the interplanetary medium." Journal of Geophysical Research (Space Physics) 108 1039 [10.1029/2001JA009186] [Journal Article/Letter]

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2003. "Solar and geospace connections of energetic particle events." Geophysical Research Letters 30 8013 [10.1029/2003GL017277] [Journal Article/Letter]

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2003. "Coronal Mass Ejections and Solar Polarity Reversal." The Astrophysical Journal 598 L63-L66 [10.1086/380430] [Journal Article/Letter]

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2002. "Relation Between Coronal Mass Ejections and their Interplanetary Counterparts." Solar-Terrestrial Magnetic Activity and Space Environment 157- [Proceedings]

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2002. "Influence of the aerodynamic drag on the motion of interplanetary ejecta." Journal of Geophysical Research (Space Physics) 107 1019 [10.1029/2001JA000120] [Journal Article/Letter]

2002. "Solar eruptions and long wavelength radio bursts: The 1997 May 12 event." Advances in Space Research 29 307-312 [10.1016/S0273-1177(01)00589-0] [Journal Article/Letter]

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2002. "A Statistical Study of Two Classes of Coronal Mass Ejections." ApJ 581 (1): 694-702 [10.1086/344088] [Journal Article/Letter]

2002. "Measurements of Three-dimensional Coronal Magnetic Fields from Coordinated Extreme-Ultraviolet and Radio Observations of a Solar Active Region Sunspot." The Astrophysical Journal 574 453-466 [10.1086/340923] [Journal Article/Letter]

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2001. "Development of SOHO/LASCO CME Catalog and Study of CME Trajectories." AGU Spring Meeting Abstracts 31- [Journal Article/Letter]

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2001. "Radio Signatures of Coronal Mass Ejection Interaction: Coronal Mass Ejection Cannibalism?." The Astrophysical Journal 548 L91-L94 [10.1086/318939] [Journal Article/Letter]

2001. "A multi-wavelength study of solar coronal-hole regions showing radio enhancements." Astronomy and Astrophysics 378 1037-1045 [10.1051/0004-6361:20010569] [Journal Article/Letter]

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2001. "Introduction to special section: Global picture of solar eruptive events." Journal of Geophysical Research 106 25135-25140 [10.1029/2001JA000071] [Journal Article/Letter]

2001. "Characteristics of coronal mass ejections associated with long-wavelength type II radio bursts." Journal of Geophysical Research 106 29219-29230 [10.1029/2001JA000234] [Journal Article/Letter]

2001. "Predicting the 1-AU arrival times of coronal mass ejections." Journal of Geophysical Research 106 29207-29218 [10.1029/2001JA000177] [Journal Article/Letter]

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2000. "Time Evolution of Microwave and Hard X-ray Spectral Indexes." High Energy Solar Physics Workshop - Anticipating Hess! 206 355 [Proceedings]

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2000. "Correction to “Change in photospheric magnetic flux during coronal mass ejections”." Geophysical Research Letters 27 1863-1863 [10.1029/2000GL900009] [Journal Article/Letter]

2000. "Structure and Dynamics of the Corona Surrounding an Eruptive Prominence." Advances in Space Research 25 1851-1854 [10.1016/S0273-1177(99)00597-9] [Journal Article/Letter]

2000. "The ALFA medium explorer mission." Advances in Space Research 26 (4): 743-746 [10.1016/S0273-1177(99)01204-1] [Journal Article/Letter]

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2000. "Radio-rich solar eruptive events." Geophysical Research Letters 27 1427-1430 [10.1029/1999GL003665] [Journal Article/Letter]

2000. "SOHO and radio observations of a CME shock wave." Geophysical Research Letters 27 1439-1442 [10.1029/1999GL003669] [Journal Article/Letter]

2000. "Change in photospheric magnetic flux during coronal mass ejections." Geophysical Research Letters 27 1435-1438 [10.1029/1999GL003666] [Journal Article/Letter]

2000. "The Astronomical Low Frequency Array: A Proposed Explorer Mission for Radio Astronomy." Washington DC American Geophysical Union Geophysical Monograph Series 119 339-349 [] [Journal Article/Letter]

2000. "Type II Solar Radio Bursts." Washington DC American Geophysical Union Geophysical Monograph Series 119 123 [Journal Article/Letter]

2000. "Radial Evolution and Turbulence Characteristics of a Coronal Mass Ejection." The Astrophysical Journal 530 1061-1070 [10.1086/308378] [Journal Article/Letter]

2000. "Observations of the 24 September 1997 Coronal Flare Waves." Solar Physics 193 161-180 [] [Journal Article/Letter]

2000. "Structure of a Large low-Latitude Coronal Hole." Solar Physics 193 181-193 [] [Journal Article/Letter]

2000. "Early life of coronal mass ejections." Journal of Atmospheric and Solar-Terrestrial Physics 62 1457-1469 [10.1016/S1364-6826(00)00079-1] [Journal Article/Letter]

2000. "Soft X‐Ray and Gyroresonance Emission above Sunspots." Astrophys J Suppl S 130 (2): 485-499 [10.1086/317355] [Journal Article/Letter]

2000. "Microwave Enhancement in Coronal Holes: Statistical Propeties." Journal of Astrophysics and Astronomy 21 413 [10.1007/BF02702435] [Journal Article/Letter]

1999. "Is the chromosphere hotter in coronal holes?." American Institute of Physics Conference Series 471 277-280 [10.1063/1.58801] [Proceedings]

1999. "Dynamical phenomena associated with a coronal mass ejectionv." American Institute of Physics Conference Series 471 641-644 [10.1063/1.58816] [Proceedings]

1999. "“Driverless“ Shocks in the Interplanetary Medium." NASA STI/Recon Technical Report N 11206 [Proceedings]

1999. "Microwave Enhancement in Coronal Holes: Structure and Variability and Magnetic Nature." NASA STI/Recon Technical Report N 11601 [Proceedings]

1999. "Multi-wavelength Signatures of Coronal Mass Ejection." Proceedings of the Nobeyama Symposium 207-210 [Proceedings]

1999. "X-ray and Microwave Signatures of Coronal Mass Ejections." Proceedings of the Nobeyama Symposium 141-152 [Proceedings]

1999. "17 GHz Mode Coupling in the Solar Corona." Proceedings of the Nobeyama Symposium 83-87 [Proceedings]

1999. "Solar Physics with Radio Observations." Proceedings of the Nobeyama Symposium [Proceedings]

1999. "The Astronomical Low Frequency Array (ALFA): Imaging from Space." Proceedings of the Nobeyama Symposium 447-451 [Proceedings]

1999. "The correspondence of EUV and white light observations of coronal mass ejections with SOHO EIT and LASCO." Washington DC American Geophysical Union Geophysical Monograph Series 109 31-46 [10.1029/GM109p0031] [Journal Article/Letter]

1999. "Reply." Journal of Geophysical Research 104 4749-4754 [10.1029/98JA02832] [Journal Article/Letter]

1999. "Microwave enhancement and variability in the elephant's trunk coronal hole: Comparison with SOHO observations." Journal of Geophysical Research 104 9767-9780 [10.1029/1998JA900168] [Journal Article/Letter]

1999. "Synoptic Sun during the first Whole Sun Month Campaign: August 10 to September 8 1996." Journal of Geophysical Research 104 9679-9690 [10.1029/1998JA900056] [Journal Article/Letter]

1999. "X-ray and radio manifestations of a solar eruptive event." Astronomy and Astrophysics 347 684-695 [] [Journal Article/Letter]

1998. "Comparison of Microwave and SOHO Synoptic Maps of the Sun During the Whole Sun Month 1996." Synoptic Solar Physics 140 401 [Proceedings]

1998. "Multiwavelength Observations of a Coronal Hole." Synoptic Solar Physics 140 363 [Proceedings]

1998. "Birth Place of the 1998 January 21 CME." CESRA Workshop on Coronal Explosive Events [Proceedings]

1998. "Radio and X-ray Investigations of Erupting Prominences (Review)." IAU Colloq 167: New Perspectives on Solar Prominences 150 358 [Proceedings]

1998. "Study of the dynamics of the solar RA(7794) during october 29 1994 with VLA at 2 and 20 cm." IX Latin American Regional IAU Meeting; "Focal Points in Latin American Astronomy" [Proceedings]

1998. "The solar origin of the January 1997 coronal mass ejection; magnetic cloud and geomagnetic storm." Geophysical Research Letters 25 2469-2472 [10.1029/98GL00493] [Journal Article/Letter]

1998. "On the relationship between coronal mass ejections and magnetic clouds." Geophysical Research Letters 25 2485-2488 [10.1029/98GL50757] [Journal Article/Letter]

1998. "Type II radio emissions in the frequency range from 1-14 MHz associated with the April 7, 1997 solar event." Geophysical Research Letters 25 (14): 2501-2504 [10.1029/98GL00706] [Journal Article/Letter]

1998. "Origin of coronal and interplanetary shocks - A new look with WIND spacecraft data." Journal of Geophysical Research 103 307 [10.1029/97JA02634] [Journal Article/Letter]

1998. "Microwave and Soft X-ray Study of Solar Active Region Evolution." Solar Physics 178 353-378 [] [Journal Article/Letter]

1998. "Spatial Structure of Solar Coronal Magnetic Loops Revealed by Transient Microwave Brightenings." Solar Physics 180 285-298 [] [Journal Article/Letter]

1998. "Coronal Dimming Associated with a Giant Prominence Eruption." The Astrophysical Journal 498 L179 [10.1086/311330] [Journal Article/Letter]

1997. "Three Part Structure of a CME Revealed by X-Ray and Microwave Observations." Magnetic Reconnection in the Solar Atmosphere 111 393 [Proceedings]

1997. "A Giant Prominence Eruption Observed by Nobeyama Radioheliograph and YOHKOH Spacecraft." IAU Joint Discussion 19 [Proceedings]

1997. "A Multi-Wavelength Analysis of the February 6/7 1997 Coronal Mass Ejection." Fifth SOHO Workshop: The Corona and Solar Wind Near Minimum Activity 404 615 [Proceedings]

1997. "Radio and X-Ray Studies of a Coronal Mass Ejection Associated with a Very Slow Prominence Eruption." The Astrophysical Journal 475 348 [10.1086/303519] [Journal Article/Letter]

1997. "X-Ray and Radio Studies of a Coronal Eruption: Shock Wave and Plasmoid and Coronal Mass Ejection." The Astrophysical Journal 486 1036 [10.1086/304556] [Journal Article/Letter]

1997. "Signatures of Coronal Currents in Microwave Images." Solar Physics 174 175-190 [] [Journal Article/Letter]

1997. "Source Parameters for Impulsive Bursts Observed in the Range 18-23 GHz." Solar Physics 171 155-159 [] [Journal Article/Letter]

1997. "Fast Time Structure during Transient Microwave Brightenings: Evidence for Nonthermal Processes." The Astrophysical Journal 491 L115 [10.1086/311063] [Journal Article/Letter]

1996. "Three part structure of a CME revealed by X-ray and microwave observations." Astronomical Society of the Pacific Conference Series 111 393-397 [Proceedings]

1996. "VLA Observations of a Solar Active Region at 62 and 35 CM Wavelength Compared with Model Calculations." Radio Emission from the Stars and the Sun 93 369 [Proceedings]

1996. "Radio and X-ray manifestations of a bright point flare." American Institute of Physics Conference Series 374 408-415 [10.1063/1.50975] [Proceedings]

1996. "Detection of Large-Scale Radio Structure and Plasma Flow during a Solar Bright Point Flare." The Astrophysical Journal 457 L117 [10.1086/309905] [Journal Article/Letter]

1996. "Yohkoh/SXT observations of a coronal mass ejection near the solar surface." New Astronomy 1 207-213 [10.1016/S1384-1076(96)00016-4] [Journal Article/Letter]

1996. "Coronal Disconnection Events and Metric Radio Emisison." Astrophysics and Space Science 243 129 [10.1007/BF00644042] [Journal Article/Letter]

1995. "VLA and YOHKOH Observations of an M1.5 Flare." The Astrophysical Journal 455 715 [10.1086/176618] [Journal Article/Letter]

1995. "Surprises in the Radio Signatures of CMEs." Coronal Magnetic Energy Releases 444 223 [10.1007/3-540-59109-5_52] [Journal Article/Letter]

1995. "A Study of Active Region Magnetic Field Structure Using VLA-Radio YOHKOH X-Ray and Mess-Optical Observations." Journal of Astrophysics and Astronomy Supplement 16 381 [Journal Article/Letter]

1994. "A Study of Active Region Magnetic Fields Using Radio and X-ray and Optical Observations." Solar Active Region Evolution: Comparing Models with Observations 68 395 [Journal Article/Letter]

1994. "A Study of Active Region Magnetic Fields Using Radio, X-ray and Optical Observations." Solar Active Region Evolution: Comparing Models with Observations 68 395 [Proceedings]

1994. "Study of Active Region Magnetic Field Structures Using VLA Radio, YOHKOH X-ray and MEES Optical Observations." Proceedings of Kofu Symposium 347-351 [Proceedings]

1994. "Interferometry of Solar Flares at 3-mm Wavelength." Infrared Solar Physics 154 131 [Proceedings]

1994. "Millimeter, microwave, hard X-ray, and soft X-ray observations of energetic electron populations in solar flares." ApJS 90 599-610 [10.1086/191881] [Journal Article/Letter]

1994. "Three-dimensional coronal structures using Clark Lake observations." Solar Physics 150 325-337 [10.1007/BF00712894] [Journal Article/Letter]

1994. "Non-radial magnetic field structures in the solar corona." Solar Physics 150 317-323 [10.1007/BF00712893] [Journal Article/Letter]

1994. "Solar simple bursts observed with spectral resolution in the 18-23 GHz range." The Astrophysical Journal Supplement Series 90 693-695 [10.1086/191891] [Journal Article/Letter]

1994. "Transient microwave brightenings in solar active regions: Comparison between VLA and YOHKOH observations." ApJL 437 522-528 [10.1086/175015] [Journal Article/Letter]

1994. "Nonthermal radio emission associated with a coronal disconnection event." The Astrophysical Journal 424 L135-L138 [10.1086/187293] [Journal Article/Letter]

1994. "Three dimensional coronal structures using Clark Lake Observations." Advances in Space Research 14 65 [10.1016/0273-1177(94)90163-5] [Journal Article/Letter]

1994. "Polarization features of solar radio emission and possible existence of current sheets in active regions." Solar Physics 155 (2): 339-350 [10.1007/BF00680599] [Journal Article/Letter]

1993. "Analysis of EUV, Microwave and Magnetic Field Observations of Solar Plage." IAU Colloq 141: The Magnetic and Velocity Fields of Solar Active Regions 46 291- 294 [Proceedings]

1993. "Simultaneous observations of solar plage with the solar extreme ultraviolet rocket telescope and spectrograph (SERTS), the VLA, and the Kitt Peak magnetograph." The Astrophysical Journal 411 410-417 [10.1086/172843] [Journal Article/Letter]

1993. "Thermal and nonthermal emissions during a coronal mass ejection." Solar Physics 143 327-343 [10.1007/BF00646491] [Journal Article/Letter]

1993. "A new investigation of microbursts at meter-decameter wavelengths." Solar Physics 143 301-316 [10.1007/BF00646489] [Journal Article/Letter]

1993. "Plasma emission from isotropic Langmuir turbulence - Are radio microbursts structureless?." The Astrophysical Journal 402 326-333 [10.1086/172136] [Journal Article/Letter]

1993. "Structure of a fast coronal mass ejection from radio observations." Advances in Space Research 13 75-78 [] [Journal Article/Letter]

1993. "Interferometric observations of solar flares at 3 mm wavelength." Advances in Space Research 13 (9): 289-293 [10.1016/0273-1177(93)90492-T] [Journal Article/Letter]

1992. "Millimeter and hard X ray/gamma ray observations of solar flares during the June 1991 GRO campaign." NASA Conference Publication 3137 502-513 [Proceedings]

1992. "Models of coronal streamers at meter-decameter wavelengths." Coronal Streamers; Coronal Loops; and Coronal and Solar Wind Composition 348 145-148 [Proceedings]

1992. "Observations of stationary radio sources: Coronal polar plumes?." Coronal Streamers; Coronal Loops; and Coronal and Solar Wind Composition 348 113-115 [Proceedings]

1992. "Are coronal type II shocks piston driven?." Particle Acceleration in Cosmic Plasmas 264 257-260 [10.1063/1.42737] [Proceedings]

1992. "Largescale Structures Associated with Eruptive Flares and Radio Waves." IAU Colloq 133: Eruptive Solar Flares 399 207 [10.1007/3-540-55246-4_100] [Journal Article/Letter]

1992. "High dynamic range multifrequency radio observations of a solar active region." ApJS 78 599-617 [10.1086/191641] [Journal Article/Letter]

1992. "Meter-decameter radio emission associated with a coronal mass ejection." IAU Colloq 133: Eruptive Solar Flares 399 268-271 [10.1007/3-540-55246-4_108] [Journal Article/Letter]

1992. "Estimation of the mass of a coronal mass ejection from radio observations." The Astrophysical Journal 390 L37-L39 [10.1086/186366] [Journal Article/Letter]

1991. "Association of a Type IV Burst with a Slow CME." Max '91/SMM Solar Flares: Observations and Theory 139 [Proceedings]

1991. "VLA Observations of Active Region 5555 During the 1st Max'91 Campaign." Max '91/SMM Solar Flares: Observations and Theory 23 [Proceedings]

1991. "Strong magnetic fields and inhomogeneity in the solar corona." The Astrophysical Journal 366 L43-L46 [10.1086/185905] [Journal Article/Letter]

1991. "Coronal magnetic structures observing campaign. I - Simultaneous microwave and soft X-ray observations of active regions at the solar limb." The Astrophysical Journal 374 374-385 [10.1086/170128] [Journal Article/Letter]

1991. "Large-scale features of the sun at 20 centimeter wavelength." The Astrophysical Journal 379 366-380 [10.1086/170512] [Journal Article/Letter]

1990. "Clark Lake radio observations of coronal mass ejections." Basic Plasma Processes on the Sun 142 495-500 [Proceedings]

1990. "The sun at the VLA's metric and decimetric wavelengths." Basic Plasma Processes on the Sun 142 523 [Proceedings]

1990. "A note on the emission mechanism of storm radiation." Solar Physics 126 367-370 [10.1007/BF00153056] [Journal Article/Letter]

1990. "Some problems in low frequency solar radio physics." Low Frequency Astrophysics from Space 362 97-101 [10.1007/3-540-52891-1_112] [Journal Article/Letter]

1990. "Microbursts at meter-decameter wavelengths." Solar Physics 142 521 [Proceedings]

1990. "The observation of an unusually fast type IV plasmoid." The Astrophysical Journal 365 L31-L34 [10.1086/185881] [Journal Article/Letter]

1990. "Filament eruption and storm radiation at meter-decameter wavelengths." Solar Physics 129 133-152 [10.1007/BF00154370] [Journal Article/Letter]

1990. "First high spatial resolution interferometric observations of solar flares at millimeter wavelengths." ApJL 358 L69-L73 [10.1086/185781] [Journal Article/Letter]

1990. "Multiple moving magnetic structures in the solar corona." Solar Physics 128 377-397 [10.1007/BF00838474] [Journal Article/Letter]

1989. "First interferometric observations with arc-sec resolution of solar radio bursts at millimeter wavelengths." Developments in Observations and Theory for Solar Cycle 22 119-130 [Proceedings]

1989. "Recent results of meter-decameter wave observations of solar flares." Solar and Stellar Flares Poster Papers 185 [Proceedings]

1989. "Radioheliograph and white-light coronagraph studies of a coronal mass ejection event." Solar Physics 122 145-173 [10.1007/BF00162832] [Journal Article/Letter]

1989. "A slowly moving plasmoid associated with a filament eruption." Solar Physics 122 91-110 [10.1007/BF00162829] [Journal Article/Letter]

1989. "Three dimensional structures of coronal streamers, holes and CME plasmoids from multifrequency imaging observations." Advances in Space Research 9 (4): 41-45 [10.1016/0273-1177(89)90092-6] [Journal Article/Letter]

1989. "The radio signatures of a slow coronal mass ejection - Electron acceleration at slow-mode shocks?." The Astrophysical Journal 347 505-513 [10.1086/168140] [Journal Article/Letter]

1988. "Millimeter wavelength observations of solar flares for Max 1991." Flare Research at the Next Solar Maximum 107-112 [Proceedings]

1988. "Recent Results of Meter-Decameter Wave Observations of Solar Flares." IAU Colloq 104: Solar and Stellar Flares 185 [Proceedings]

1987. "Two dimensional imaging observations of meter-decameter bursts associated with the February 1986 flare activity." Physical Interpretation of Solar/Interplanetary and Cometary Intervals 16 [Proceedings]

1987. "Correlated type III burst emission from distant sources on the sun." Solar Physics 112 133-142 [10.1007/BF00148493] [Journal Article/Letter]

1987. "A study of solar preflare activity using two-dimensional radio and SMM-XRP observations." Sol Phys 114 (2): 273-288 [10.1007/BF00167346] [Journal Article/Letter]

1987. "Imaging observations of the evolution of meter-decameter burst emission during a major flare." Solar Physics 111 347-363 [10.1007/BF00148525] [Journal Article/Letter]

1987. "Fine structures in solar microwave flares." Solar Physics 110 327-335 [10.1007/BF00206428] [Journal Article/Letter]

1987. "Propagation of electrons emitting weak type III bursts in coronal streamers." Solar Physics 108 333-345 [10.1007/BF00214168] [Journal Article/Letter]

1987. "Simultaneous radio and white light observations of the 1984 June 27 coronal mass ejection event." Solar Physics 114 347-362 [10.1007/BF00167350] [Journal Article/Letter]

1986. "Some interesting features in the drift pair phenomena of solar decametric radiation." Plasma Astrophysics 251 121-125 [Proceedings]

1986. "Notes and News." Bulletin of the Astronomical Society of India 14 56-63 [Proceedings]

1986. "Type-I solar radio bursts." Kodaikanal Observatory Bulletins 6 77-85 [Proceedings]

1986. "A theory of Jovian shadow bursts." Earth Moon and Planets 35 93-115 [10.1007/BF00117270] [Journal Article/Letter]

1986. "Estimation of coronal magnetic fields using Type-I emission." Bulletin of the Astronomical Institutes of Czechoslovakia 37 115-120 [] [Journal Article/Letter]

1985. "Estimation of coronal magnetic fields using solar type I radio emission." Bulletin of the Astronomical Society of India 13 81 [Journal Article/Letter]

1985. "Ion-sound turbulence due to shock gradients in collisionless plasmas." Pramana 25 575-585 [10.1007/BF02847236] [Journal Article/Letter]

1984. "Notes and News." Bulletin of the Astronomical Society of India 12 319-328 [Proceedings]

1984. "An interpretation of decametric absorption bursts." Solar Terrestrial Physics 197 [Proceedings]

1984. "Fine structure in solar decametric radiation." Nonlinear and Turbulent Processes in Physics 547-561 [Proceedings]

1984. "Observations on the Fine Structures in Solar Decametric Radio Emission." Kodaikanal Observatory Bulletins 4 47-54 [Proceedings]

1984. "Second Indo-US workshop on solar-terrestrial physics." Bulletin of the Astronomical Society of India 12 324-328 [] [Journal Article/Letter]

1984. "Narrow-band, short duration radio bursts at decameter wavelengths andtheir interpretation." Bulletin of the Astronomical Society of India 12 75-76 [] [Journal Article/Letter]

1983. "Observations and interpretation of solar decametric absorption bursts." Journal of Astrophysics and Astronomy 4 215-224 [10.1007/BF02714909] [Journal Article/Letter]

1982. "Surface instability of a current carrying plasma under the influence of a high frequency electric field." Pramana 18 473-484 [10.1007/BF02846556] [Journal Article/Letter]

1982. "Surface explosive instability for high frequency waves." Plasma Physics 24 319-329 [10.1088/0032-1028/24/3/008] [Journal Article/Letter]

1982. "Surface waves in the presence of external high frequency fields." Plasma Physics 24 1277-1290 [10.1088/0032-1028/24/10/005] [Journal Article/Letter]

1980. "Absorption of intense electromagnetic beams in a magnetoplasma." Astrophysics and Space Science 73 179-186 [10.1007/BF00642372] [Journal Article/Letter]

Non-Refereed

2009. "Recent STEREO Observations of Coronal Mass Ejections." AGU Fall Meeting Abstracts A1491- [Proceedings]

2008. "Commission 10: solar activity." Proceedings of the International Astronomical Union 4 (T27A): 79-103 [Full Text] [10.1017/S1743921308025350] [Proceedings]

2007. "Division II / Working Group International Collaboration in Space Weather." Proceedings of the International Astronomical Union 3 (T26B): 107-110 [10.1017/S1743921308023752] [Proceedings]

2006. "A Sun-to-Earth Campaign Joining Observations from the Great Observatory with Worldwide Satellite and Ground-Based Resources to Investigate System Science Frontiers." AGU Spring Meeting Abstracts A3- [Journal Article/Letter]