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Professor. Sushil Kumar

[BSc, MSc (Agra), PGDip (Science & App), PhD Bark.]

 

Professor in Physics, Space & Atmospheric Physics
School of Engineering & Physics

  • Email: kumar_su(at)usp.ac.fj
  • Telephone: +679 32 32144
  • Facsimile: +679 32 31511/ 32 31538
  • Postal: School of Engineering & Physics, USP, Private Mail Bag, Laucala Campus, Suva, FIJI ISLANDS.

 


 

Prof. Sushil Kumar has more than 20 years of experience in research (Atmospheric and Space Physics) and teaching at various universities and Institutes. Prof. Kumar has carried out collaborative work with several international research institutes and universities and has published jointly in high rank journals. Prof. Kumar, at the USP initiated the research in the area of Extremely Low Frequency (ELF) and Very low frequency (VLF) under research grant from USP in collaboration with World-Wide Lightning Location Network (WWLLN), University of Washington, USA, and later in the areas of Atmospheric electricity, GPS, and Natural & Space Weather Hazards. His research was supported by Space, Telecommunications and Radio Science (STAR) laboratory, Stanford University, USA under the International Heliophysical Year 2007 (IHY 2007) project supported by UN/NASA. His recent research has been supported by GNSS Center, Wuhan University, China, AOARD, Japan, etc and through the university SRT funding. The technical, scientific & instrumental support has been provided by collaborators.

Prof. Kumar graduated with MSc Physics with Electronics from St. John’s College (Agra University), India, in 1989. He then completed PG Diploma in Space Science and Applications from Gujarat University, India, and Ph.D. in Physics (Space Physics) from Barkatullah University, Bhopal, India. His PhD work dealt with Experimental study of VHF ionospheric scintillations, experimental and theoretical study of whistler and related phenomena at low latitudes. The PhD work was carried out under the All India Coordinated Program on Ionospheric Thermospheric Studies (AICPITS) sponsored by Department of Science and Technology, Govt. of India. He had participated in the XVIIIth Indian Scientific Expedition to Antarctica, during December 1998 to March 1999, during his post-doctoral fellowship.

Teaching 

The teaching interest includes mainly; Electronics, Electromagnetism, Radio Wave propagation, Signals and Systems, Electronic Communication. Before joining USP in 2002, Prof. Kumar had taught several courses on Electrodynamics, Signals and Systems, Communications, Fortran Programming, Statistical Physics and Thermodynamics, Electronics, Modern Physics, Advanced Quantum Mechanics, Radio Wave Communication.

At USP Prof. Kumar has been involved with the teaching of several UG and PG courses: PH101: Quantum and Electrical Physics, PH102; Classical Physics, PH105: Physics for Today’s World, PH106: Physics for other Sciences, PH203: Electromagnetism, PH205: Electronics, PH302: Electrical Communication & Instrumentation, PH306: Measurement and Control of Physical Systems, PH400: Research Projects in Physics, PH402: Radio Wave Propagation & Applications, PH421: Electronics, Active device. PH422: Modulation Methods and Information Theory, EV405: Field and Laboratory Techniques in Environmental studies: SC400: Research Methods.

Research 

Current areas of research interest are;

• Remote sensing of upper atmosphere using ELF/VLF radio wave technique

Lightning discharges are natural powerful transmitters of wide electromagnetic spectrum with maximum energy in the VLF and ELF bands. The energy contained in impulse like signals called radio atmospheric or sferics is guided for long distance by multiple reflections from ground/ocean and lower ionosphere. A part of energy sometimes propagates along earth’s magnetic field lines in the ionosphere and magnetosphere and is received as ‘whistlers’. The received signals at long distances contain a great deal of information about the state of ionosphere and magnetosphere along the path and form a novel tool for research and navigational communication. A facility called “SoftPAL” software base Amplitude and Phase recording of Very Low Frequency (VLF) transmitters was established in Sept. 2006 that is used to study the perturbations of VLF propagation due to strong lightnings, solar flares, geomagnetic storms, earthquakes and tropical cyclones.

• Space Weather and its Technological Impacts

The Space Weather is related with the change in upper atmosphere due to solar disturbances. Southward Interplanetary Magnetic fields (IMF BS) interconnects with the northward Earth’s magnetic field and permit solar wind energy transport into the Earth’s magnetosphere forming geomagnetic storms which cause severe amplitude and phase scintillations/perturbations on signals used in satellite communications and Global Positioning System (GPS). The depression in the horizontal component (H) of the earth’s magnetic field lasting over several hours is the characteristic signature of a geomagnetic storm. A geomagnetic storm is caused by the ring current encircling the earth in the westward direction and can be monitored by the geomagnetic index ‘Dst’. F2-region response of a geomagnetic storm is called an ionospheric storm. Currently, efforts are being made to set-up the GPS- GSV4004B to study the Space weather impacts on Ionospheric electron content and L band scintillation in the South Pacific Region. A clear understanding of interplanetary causes of geomagnetic storms and ionospheric storms should help better in understanding the so called Space Weather Research and Forecasting.

• Climate Change (Upper and Lower Atmosphere): Natural Hazards

Study of natural hazards is important for scientific interest as well as to reduce the damages by extreme natural events. The threats due these events are increasing due to increase in population, economic and infrastructure development etc. mainly in terms of cost. Also the rising concentrations of greenhouse gases (GHGs) are producing the global warming in lower atmosphere and the cooling in the upper atmosphere (ionosphere) starting from 50 km or so. The global climate models indicate relatively more frequent severe weather events such as tropical cyclones and resulting floods. The South Pacific Region, in particular, is highly vulnerable to the natural hazards such as severe earthquakes that may also result in tsunami and cyclones which may cause severe floods etc.

• Plasma waves, fields and currents in the magnetosphere

A wide variety of plasma waves can be excited in the magnetosphere under different plasma conditions. The magnetospheric electric fields and currents are important parameters for magnetospheric processes. The study of these waves is useful in understanding the various astrophysical and geophysical phenomena and numerous plasma applications. We study plasma waves to understand the physics of natural plasmas. Much of the known matter in the universe exists in the plasma state (99.9%).

Service to the Profession

• Reviewer for the Journals: Journal of Atmospheric and Solar Terrestrial Physics, Advances in Space Research, Planetary and Space Science, Published by Elsevier Press, Earth Planet and Space, Japan, Radio Science, Journal of Geophysical Research, (AGU, USA), Ind. J. Radio and Space Physics, Journal of Atmospheric and Ocean Technology, Weather and Forecasting, Natural Hazards and Earth Science System.

• Associate Editor (Physics): The South Pacific Journal Natural and Applied Sciences, USP, Suva, Fiji. Published by CSIRO- Australia. 2005 to date.

• Chief Editor: The South Pacific Journal Natural and Applied Sciences, Volume no. 29, USP, Suva, Fiji. Published by CSIRO- Australia. 2009 volume.

• Chair Editorial Board: The South Pacific Journal Natural and Applied Sciences, June 2010.

• Member of the Editorial Board of the Indian Journal of Radio & Space Physics (IJRSP) for the period January 2015 - December 2017.

Member

• Member-American Geophysics Union (AGU)

• Member AGU Focus Group, Natural Hazards.

• Member- The Institute of Electrical and Electronics Engineers (IEEE).

• Associate-The Committee on Space Research (COSPAR), International Council for Science in 1958, France. 

• Radioscientist and Member and, International Union of Radio Science (Union Radio-Scientifique Internationale, URSI).

• Member-Working Group, VERSIM-URSI 

Visiting Fellowships and Awards

• Visiting scholarship supported by European Science Foundation at Technical University of Denmark, Space Science Institute, Copenhagen, 03 January -02 February, 2016.

• Ratu Sir Kamesese Mara Visiting Fellowship, Department of Physics, Otago University, Dunedin, New Zealand. Awarded by Otago University. 15 January to14 April 2011.

• Vice-Chancellor’s Prize for Research Excellence-2008”, The University of the South Pacific, Suva, Fiji. Awarded April 2009.

• Travel support under young scientist award by United Nations for Outer Space Program to present a research paper in COSPAR Colloquium, 2002, Bulgaria.

• Visiting Associateship (University Teachers Support) by Physical Research Laboratory, Ahmedadad, India, 2002

Collaborations: Selected

• Space Physics Group, Physics Department, Otago University. Started in 2006 with a project on SoftPAL based VLF studies.

• STAR laboratory, Stanford University, USA. Started in 2009 with VLF studies using AWESOME system.

• World-wide Lightning Location network, University of Washington, USA. Started in 2003 with a host from the South Pacific Region

• Indian institute of Geomagnetism, India. Started in 2010 after identifying the areas of common research interest.

• Space Physics laboratory, Bhopal University, Bhopal, India. Did PhD from this university and it is an ongoing collaboration.

• The Atmosphere-Space Interactions Monitor (ASIM): ASIM is an experiment proposed for the International Space Station (ISS) external facilities on the Columbus module. ASIM is aimed at the study of high-altitude optical emissions from the stratosphere and mesosphere, the Transient Luminous Events (TLEs: Red Sprites, Blue Jets, Elves) and the Terrestrial Gamma Flashes (TGFs): It is coordinated by Prof. T. Neubert, Danish National Space Center (DNSC), Lyngby; Denmark. Newly started (2013).

• Variability of the Sun and Its Terrestrial Impact (VarSITI) 2014-2018: The VarSITI program strives from international collaboration in data analysis modeling and theory to understand how the solar variability affects Earth.

• Global Navigation Satellite Systems (GNSS) Center, Wuhan University. A MoU has been signed dated 27 August 2014 between SEP-FSTE_USP and GNSS center for collaborative research on GNSS applications to atmospheric studies in coming 5 years.

Collaborative Projects: Selected

• Very Low Frequency Direction Finding: Coordinated Whistler Studies at Antarctica, with University of Natal, SA. and Univ. of Bhopal, India, and under South African-Indo Inter-Governmental Science and Technology Cooperation Program – Funded by Department of Science and Technology, Government of India, New Delhi, India, January 2003-06.

• Global Lightning Detection: In collaboration with World Wide Lightning Location (WWLL) Network, Dunedin, New Zealand. There are 35 universities and national institutes all over the world currently participating in WWLLN. 2003 to date. Funded by WWLLN and USP.

• Remote sensing of the lower ionosphere by simultaneous observations of VLF radio wave signals in Fiji and New Zealand. Dr. Sushil Kumar, Physics, SEP, USP, and Dr. N. R. Thomson (Associate. Prof.), Dr C. J. Rodger, Radio and Space Physics Group, Otago University, Dunedin, New Zealand. 2006-2010. Funded by USP.

• Upper Atmospheric Investigation Using Atmospheric Weather Electromagnetic System for Observation, Modelling, and Education (AWESOME), ELF-VLF Radio Wave Recorder. In collaboration with STAR Laboratory of Stanford University, USA. Jan 2010 to date. Funded by Stanford University and USP.

• Multi-electrode potential measurements to detect and analyze the frequency time occurrence of selected natural hazards (Cosmic, earthquake and lightning). Principal Investigate: Professor Sushil Kumar, Co-Investigator: Vadim S. Bobrovskiy, Distant School COSMIC-METEO-TECTONICS, Petropavlovsk-Kamchatsky, Russia. Vad.Bobrovskiy@cosmetecor.org, Professor, Dr.Sc. Alexey A. Lyubushin, Institute of the Physics of the Earth, Russian Academy of Sciences, Moscow, Russia., Dr. Abhikesh Kumar. SEP, FSTE, USP. 2017-2020.

• Space Weather effects on Ionospheric electron content and L band scintillation at Equatorial and Low latitudes. Principal Investigator: Professor Sushil Kumar. Funded by Total cost U$36,608.0. Asian Office Aerospace Research and Development, Tokyo Japan. December 2016-November 2019.

Research Publications

Journals (62), Book chapter (01), Tech. Pub (01), Edited/Refereed Proceedings (10), Conferences (50)

Some selected publications

• Sushil Kumar, Samir Nait Amor, Olivier Chanrion and Torsten Neubert, Perturbations to the Low Latitude Lower Ionosphere by Tropical Cyclone Evan in the South Pacific Region, Journal of Geophysical Research-Space Physics, Accepted (June 2017, in press) 

• Amol Kishore, Anil Deo, Sushil Kumar, Upper atmospheric remote sensing using ELF-VLF lightning generated tweek and whistler sferics, South Pacific J. Natural and Applied Sci., (SPJNAS) 34(1), 12-20, 2016. [ERA 2010, C rank].

• Ramendra Prasad, Sushil Kumar, P. T. Jayachandran, Differential code bias estimation and GPS TEC study at a low latitude station in the South Pacific Region, J. Atmospheric Solar-Terrestrial Physics, Volume 149, November 2016, Pages 120–130, 2016 [SJR Q2, IF 1.5, ERA 2010 rank B].   dx.doi.org/10.1016/j.jastp.2016.10.004

• Sushil Kumar, Abhikesh Kumar, Ajeet K Maurya, Rajesh Singh, Changes in the D region associated with three recent solar eclipses in the South Pacific region, Journal of Geophysical Research-Space Physics, 121, doi:10.1002/2016JA022695, 2016. [SJR Q1, IF 3.303, ERA 2010 rank A*].

• Sneha A. Gokani, Rajesh Singh, Morris B. Cohen, Sushil Kumar K. Venkatesham, Ajeet K. Maurya, R. Selvakumaran, J. Litchtenberger, Very low latitude (L=1 =1.08) whistlers and correlation with lightning activity, Journal of Geophysical Research-Space Physics, 120, doi:10.1002/2015JA021058, 2015. [SJR Q1, IF 3.44, ERA 2010 rank A*].

• R. Selvakumaran, Ajeet K. Maurya, Sneha A. Gokani, B. Veenadhari, Sushil Kumar, K. Venkatesham, D.V.Phanikumar, Abhay K. Singh, Devendraa Siingh, Rajesh Singh (2015), Solar flare effect on ionosphere and geomagnetic field, J. Atmospheric Solar- Terrestrial Physics, 123, 102-112, 2015.  http://dx.doi.org/10.1016/j.jastp.2014.12.009. [SJR Q2, IF 1.5, ERA 2010 rank B].

• Sushil Kumar, Abhikesh Kumar, Frederik Menk, Ajeet K Mauyra, Rajesh Singh,  B. Veenadhari, Response of the low latitude D-region ionosphere to extreme space weather event of 14-16 December 2006, Journal of Geophysical Research-Space Physics, 120, 788–799, doi:10.1002/2014JA020751, 2015. [SJR Q1, IF 3.303, ERA 2010 rank A*].

• Ajeet K. Maurya, D.V. Phani Kumar, Rajesh Singh, Sushil Kumar, B. Veenadhari, Y.-S. Kwak, Abhikesh Kumar and Abhay K. Singh, Wave-like signatures in the low-mid latitude D-region ionosphere associated with 22 July 2009 Total Solar Eclipse inferred from VLF observations, Journal of Geophysical. Research (Space Physics), Volume 119, Issue 10,  pages 8512–8523, October 2014, DOI: 10.1002/2013JA019521. [SJR Q1, IF 3.303, ERA 2010 rank A*].

• Abhikesh Kumar and Sushil Kumar, Space Weather Effects on the Low Latitude D-Region Ionosphere during Solar Minimum, Earth Planet Space, 66, 76-77, 2014.  [SJR Q2, IF 1.025, ERA 2010 rank B].

• M. M. Salut,M. B. Cohen,2 M. A. M. Ali, and K. L. Graf B. R. T. Cotts, M. Abdullah, and Sushil Kumar, On the Relationship Between Lightning Peak Current and Early VLF Ionospheric Disturbances, Journal of Geophysical. Research (Space Physics). VOL. 118, 1–11, doi:10.1002/2013JA019087, 2013. [SJR Q1, IF 3.303, ERA 2010 rank A*].

• Prateek R. Srivastava, Sneha A. Gokani, Ajeet K. Maurya, Rajesh Singh, Sushil Kumar,, B. Veenadhari, R. Selvakumaran, Abhay K. Singh, Janos Lichtenberger, One-to-one relationship between low latitude whistlers and conjugate source lightning discharges and their propagation characteristics, Advances in Space Research, 52, 1966–1973, 2013. [SJR Q3, IF 1.0, ERA2010 C].

• A. K. Maurya, R. Singh, B. Veenadhari, Sushil Kumar, and A. K. Singh, Sub-ionospheric VLF perturbations associated with the 12 May 2008 M7.9 Wenchuan earthquake, Natural Hazards and Earth System Sciences, 13, 2331–2336, 2013.   EGU, France.  [IF 1.9, USP Revised ERA 2010 rank B].

• Abhikesh Kumar, Sushil Kumar, Masashi Hayakawa, and Fredrik Menk, Subionospheric VLF perturbations observed at low latitude associated with earthquake from Indonesia region, J. Atmospheric Solar- Terrestrial Physics, 102, 71–80, 2013. [SJR Q2, ERA 2010 B, IF 1.5].

• Vickal V. Kumar, Alain Protat, Peter T. May, Christian Jakob, Guillaume Penide, Sushil Kumar, Laura Davis, On the effects of large-scale environment on convective cloud characteristics over Darwin, Australia, Monthly Weather Review (American Meteorological Society), Vol., 141, 1358-1574, 2013. [SJR Q1, IF 2.4, USP Revised ERA 2010 rank A ]

• B. A. Carter, K. Zhang, R. Norman, V. V. Kumar and Sushil Kumar, On the occurrence of the equatorial F-region irregularities during solar minimum using radio occultation measurements, Journal of Geophysical. Research (Space Physics), VOL. 118, 1–13, doi:10.1002/jgra.50089, 2013. [SJR Q1, IF 3.303, ERA 2010 rank A*].

• Sushil Kumar and Abhikesh Kumar, Lightning-associated VLF perturbations observed at low latitude: Occurrence and scattering characteristics, Earth Planets Space, 65, 25–37, 2013.  [SJR Q2, IF 3.003, ERA 2010 rank B].

• Rajesh Singh, Morris B Cohen, Ajeet K. Maurya,  B. Veenadhari, Sushil Kumar, P. Pant, Ryan K. Said, Umran S Inan, Very Low Latitude (L=1.08) Whistlers, Geophysical Research Letters, AGU, USA, VOL. 39, L23102, doi:10.1029/2012GL054122, 2012. [SJR Q1, IF 3.303, ERA 2010 rank A*].

• Ajeet. K. Maurya, B.Veenadhari, Rajesh Singh, Sushil Kumar,  M. B. Cohen, P. Pant, A.K. Singh, R Selvakumaran, Umran S Inan, Nighttime D-region electron density measurements from tweek radio atmospherics recorded at low latitudes, Journal of Geophysical Research (Space Physics), VOL. 117, A11308, doi:10.1029/2012JA017876, 2012. [SJR Q1, IF 3.303, ERA 2010 rank A*].

• M. M. Salut, M. Abdullah,K. L. Graf, M. B. Cohen, B. R. T. Cotts and Sushil Kumar, Long ionospheric recovery perturbations associated with lightning discharges, Journal of Geophysical. Research (Space Physics), 117, A08311, doi:10.1029/2012JA017567, 2012. [SJR Q1, IF 3.303, ERA 2010 rank A*].

• Ajeet K. Maurya, Rajesh Singh, B. Veenadhari, Sushil Kumar, M. B. Cohen, R. Selvakumaran, P. Pant, A.K. Singh, U.S. Inan, Morphological features of Tweeks and nighttime D-region ionosphere at tweek reflection height from the observations in the low latitude Indian Sector, Journal of Geophysical. Research (Space Physics),117, A05301, doi:10.1029/2011JA016976, 2012. [SJR Q1, IF 3.303, ERA 2010 rank A*].

• B. Veenadhari, R. Selvakumaran, Rajesh Singh, Ajeet K. Maurya, N. Gopalswamy, Sushil Kumar, T. Kikuchi, CME-driven shocks and the associated sudden commencements/sudden impulses, Journal of Geophysical Research (Space Physics), 117, A04210, doi:10.1029/2011JA017216, 2012. American Geophysical Union (AGU).   [SJR Q1, IF 3.303, ERA 2010 rank A*].

• Rajesh Singh, B. Veenadhari, Ajeet K. Maurya, Morris B Cohen, Sushil Kumar, R Selvakumaran,  P. Pant, Abhay K Singh, Umran S Inan, D-region ionosphere response to the Total Solar Eclipse of 22 July 2009 deduced from VLF tweek observations in the Indian sector, Journal of Geophysical Research (Space Physics), 116, A10301, doi:10.1029/2011JA016641, 2011. American Geophysical Union (AGU).   [SJR Q1, IF 3.303, ERA 2010 rank A*].

• Sheikh Izzal Azid and Sushil Kumar, Analysis and performance of a low cost SMS based Home security system, International Journal of Smart Home, Vol. 5, No. 3, 15-24, 2011. [SJR Q3, ERA 2010 rank C].

• Sushil Kumar, Anil Deo, V. Ramachandran, Nighttime D-region equivalent electron density determined from tweek sferics observed in the South Pacific Region, Earth Planets Space, 61, 905-9, 2009. Terra Scientific Publishing Company, Japan. [SJR Q2, IF 3.003, ERA 2010 rank A*].

• Sushil Kumar, Waveguide parameters of 19.8 kHz signal propagating over a long path, Research Letters in Physics, Vol. 09, 1-4, doi:10.1155/2009/216373, 2009. USA. [ERA 2010 rank C].

• Richard L Dowden1, Robert H Holzworth2, Craig J Rodger3, Jαnos Lichtenberger4, Neil R Thomson3, Abram R Jacobson2, Erin Lay2, James B Brundell1, Thomas J Lyons5, Steven O'Keefe6, Zen Kawasaki7, Colin Price8, Victor Prior9, Pascal Ortιga10, James Weinman11, Yuri Mikhailov12, Ronald Woodman13, Xiushu Qie14, Gary Burns15, Andrew Collier16, Osmar Pinto Junior17, Ricardo Diaz18, Claudia Adamo19, Earle R Williams20, Sushil Kumar21, G. B. Raga22, Jose M Rosado23, Eldo E. Avila24, Mark A Clilverd25, Thomas Ulich26, Peter Gorham27, Thomas J G Shanahan28, Thomas Osipowicz29, Gregory Cook30, Yang Zhao31, World-Wide Lightning Location Using VLF Propagation in the Earth-Ionosphere Waveguide, IEEE Antennas and Wave Propagation Mag., 50(5), 40-60, 2008, USA. Published by IEEE. [IF1.3, ERA 2010, B rank]. 

• Sushil Kumar, A. Kishore, V. Ramachandran, Higher harmonic tweek sferics observed at low latitude:  Estimation of VLF reflection heights and tweeks propagation distance, Annales Geophysicae, 26, 1451–1459, 2008. EGU, France.  [SJR Q2, IF 1.725, ERA 2010 rank C].

• Sushil Kumara, Abhikesh Kumara, Craig J. Rodgerb, Subionospheric early VLF perturbations observed at Suva: VLF detection of red sprites in the day, J. Geophys. Res., VOL. 113, A03311, doi:10.1029/2007JA012734, 2008, American Geophysical Union (AGU).   [IF 3.303]. Ranked in the top 10% of the ISI category of Multidisciplinary Geosciences. [SJR Q1, IF 3.303, ERA 2010 rank A*]

• PN Vijayakumar, TR Tyagi, Lakha Singh, H Chandra, GD Vyas, DRK Rao, BM Pathan, A Iype, B Ramsekaran, A Naidu, SM Sadique, KN Iyer, KN Pathak, AK Gwal, Sushil Kumar, RP Singh, UP Singh, Birbal Singh, Pawan Kumar, GN Navneeth, PVS Koparkar, PVS Ramarao, PT Jaychandran, P Sriram, R Sethuraman, A Dasgupta, K Basu, RG Rastogi, Some features of plasma bubble induced scintillations during the AICPITS campaigns of 1991, Indian Journal of Radio and Space Physics, 36 (2), 91-96, 2007.

• V. Ramachandran, Justine Prakash, Anil Deo and S. Kumar, Lightning location from single station measurements and Validation with WWLLN data, Annales Geophysicae, 25, 1509-1517, 2007. EGU, France.  [SJR Q2, IF 1.725, ERA 2010 rank C].

• Sushil Kumar, A. Deo, A. Kishore, and V. Ramachandran, Whistlers observed at the low latitude ground based VLF facility in the South Pacific region, J. Atmos. Sol.- Terr. Phys.,  69, 1366-1376,  2007. Elsevier Press. [IF 1.643].

• Sushil Kumar, A. Kishore, and V. Ramachandran, Ionospheric Scintillation on 3.925 GHz signal from Intelsat 701 in the South Pacific Region, Physica Scripta, 75, 258-262, 2007. Royal Swedish Academy of Sciences. . [IF 1.088]

• Sushil Kumar, F2-region response of geomagnetic storms at equatorial anomaly crest, Physica Scripta, Sweden, Vol. 72(1) 100-104, 2005. Royal Swedish Academy of Sciences. [IF 1.088]

• Sushil Kumar, H. Chandra and S. Sharma, Geomagnetic storms and ionospheric effects observed at equatorial anomaly crest in Indian Region, Journal Atmospheric Solar- Terrestrial Physics, 67, 581-594, 2005. Elsevier Press. [IF 1.643].

• Girija Rajaram  Ajay Dhar and S Kumar, Comparison of 30 MHz Riometer and geomagnetic variations at the Indian Antarctic Station Maitri on the Zero Solar Wind day of 11May 1999, with the high solar wind day 18 May, 1999, Advances in Space Res., UK, 28, 1661-1667, 2001. Elsevier Press. [IF 1.041]

• Sushil Kumar and A. K. Gwal, VHF ionospheric scintillations at equatorial anomaly crest: Solar and magnetic activity effects, Journal Atmosphere Solar-Terrestrial Physics, 62, 157-167, 2000. Elsevier Press. [IF 1.643]

• Sushil Kumar, A. K. Gwal, P. V. S Ram Rao, P. T. Jaychandran, D. S.V. V. D. Prasad, R. P. Singh, U. P. Singh, A. DasGupta, H. Basu, R. Sethuraman, B. M. Pathan, R. R. K. Rao, S. Banoal, P. S. Kesava Rao, Appala Naidu, T. R. Tyagi, P. N. Vijayakumar, H. Chandra, G. D. Vyas, Birbal Singh, Pawan Chauhan, K. N. Iyer, K. N. Pathak, C. S. Shalgaongar, M. M. Vyas, R. G. Rastogi.  Co-ordinated observations of VHF scintillations in India during February-March 1993,  Indian Journal Radio & Space Phys., 29, 1-15, 2000. Published by CSIR, India

• Sushil Kumar, S. K. Dixit and A. K. Gwal, Electron cyclotron waves in presence of parallel electric fields in the Earth,s auroral magnetoplasma, Annales Geophysicae, 15, 24-28, 1997. EGU, France.  [IF 1.725].

• Sushil Kumar, A. K. Gwal, B. M. Pathan and D. R. K. Rao, Zonal drifts of ionospheric irregularities at temperate latitude in the Indian region, Annales Geophysicae, 13, 724-729, 1995. European Geosciences Union (EGU), France.  [IF 1.725].

• S. Kumar, S. K. Dixit and A. K. Gwal, Propagation of tweek  atmospherics in the earth-ionosphere waveguide, IL Nuavo Cimento C, 17, 275-280, 1994. Italy.

• Sushil Kumar, A.K. Singh, Pawan Chauhan, A. K. Gwal, Birbal Singh and R. P. Singh, Multistation analysis of VHF radio wave scintillations at low latitudes, Indian Journal Radio & Space Physics., 22, 267-272, 1993. Published by CSIR, India

Conferences

Attended several international and national conferences, symposia, summer schools, and presented more than  50 research papers in conferences. 

Recent presentations

• Atishnal Elvin Chand and Sushil Kumar, VLF modal interference distance for a west-east propagation path to Fiji, Presented in URSI Asia-Pacific Radio Science Conference, 21-25 August 2016, Seoul, Korea.  

• Sushil Kumar, Samir Nait Amor, Olivier Chanrion, Torsten Neubert, Temporal Evolution of Lightning and VLF perturbations associated with four recent Tropical Cyclones in the South Pacific Region, Presented in AOGS 13th Annual Meeting/conference, 31 July to 5 Aug, 2016, Beijing, China.

• Ramendra Prasad and Sushil Kumar, GPS L-band Scintillations at a low latitude Station in the South Pacific Region during the low solar activity period, Presented in AOGS 13th Annual Meeting/conference, 31 July to 5 Aug, 2016, Beijing, China.

• Rajesh Singh, Ajeet K. Maurya, Oliver Charnion, Torsten Neubert, Steven A. Cummer, Jansuz Mlynarczyk, Jσzsef Bσr,  Devendraa Siingh, Morris B. Cohen and Sushil Kumar, First observations of Gigantic Jets from Monsoon Thunderstorms over    India,  Presented in European Geosciences Union General Assembly 2016 (Session NH1.2/AS1.6/SSS2.25), Vienna, Austria, 17–22 April 2016.

• Ashneel Chandra, Sushil Kumar and Abhikesh Kumar, Lightning activity variation during the evolution of tropical cyclones in the southwest Pacific region. Presented in 2015 AGU Fall Meeting, San Francisco, California, USA, 14-18 December 2015.

• Sushil Kumar and Abhikesh Kumar, VLF perturbations associated with solar eclipses of November 2012 and May 2013 in the south pacific region. Presented in 2015 AGU Fall  Meeting, San Francisco, California, USA, 14-18 December 2015.

• Sushil Kumar and Abhikesh Kumar,  An overview of Early VLF perturbations at low latitude in the South pacific region. Presented in Thunderstorm Effects on the Atmosphere-Ionosphere System (TEA-IS) Summer school, Collioure, France, June 23 - 27, 2014.

• R. Singh, A. K. Maurya, D.V. Phani Kumar, S. Kumar and B. Veenadhari, Wave-like signatures in the low-mid latitude D-region ionosphere associated with 22 July 2009 total solar eclipse. Presented in 6th VERSIM Workshop, Otago University, Dunedin, New Zealand, 20-23 January 2014. 

• R. Singh, S. A. Gokani, A. K. Maurya, B. Veendhari, Sushil Kumar, M. B. Cohen and J. Lichtenberger, Geo-location and propagation features of very low latitude whistlers (L=1.08). Presented in 6th VERSIM Workshop, Otago University, Dunedin, New Zealand, 20-23 January 2014. 

• Sushil Kumar, Abhikesh Kumar, Ajeet K Maurya, and Rajesh Singh, Early VLF perturbations at low latitude in the South pacific region: Awesome and SOFTPAL observations. Presented 6th VERSIM Workshop, Otago University, Dunedin, New Zealand, 20-23 January 2014. 

• Sushil Kumar and Abhikesh Kumar, Space Weather Effects on the Low Latitude D-Region Ionosphere during Solar Minimum. Presented in International CAWSES (Climate of Sun Earth System) II symposium, Nagoya University, Japan. 18-22 November 2013.

• Abhikesh Kumar, Sushil Kumar, Masashi Hayakawa, and Frederik Menk, VLF perturbations at Low latitude Associated with December 2006 Natural Hazard Events: Indonesia Region Earthquake and Geomagnetic Storm. Presented in AOGS 2013, Brisbane, Australia, from 24 to 28 June 2013.

• Sushil Kumar and Abhikesh Kumar, Tracking of tropical cyclonic storms and thunderstorms in the South Pacific region – Application of World-Wide Lightning Location Network, Presented in Science, Technology and Resources Network (STAR) Conference,3-6 November, 2012, Noumea, New Caledonia.

• B A. Carter, K. Zhang, R. Norman, V. V. Kumar, S. Kumar, COSMIC observations of equatorial F-region irregularities. Presented in 12th Australian Space Science Conference (ASSC), RMIT University, Melbourne, 12th Australian Space Science Conference (ASSC), held at RMIT University, Melbourne, AU. 

• Sushil Kumar, Rajesh Singh, B. Veenadhari, Abhikesh Kumar, and Ajeet Maurya, Space Weather: ELF-VLF observations. Presented in Indo-US VLF workshop, 27 Nov-01 Dec 2011, Goa, India.

• Abhikesh Kumar and Sushil Kumar, A study on subionospheric VLF signals observed in Fiji. Presented in Indo-US VLF workshop, 27 Nov-01 Dec 2011, Goa, India.

• Sushil Kumar, A brief Review of the long term effect of Climate Change on the upper atmosphere and ionosphere – Space Weather Contribution. Presented in International Conference on Climate Renewable energy and Climate Change, 6-10 December 2010, The University of the South Pacific, Suva, Fiji.

Further Information

E-mail: kumar_su@usp.ac.fj

Phone: +679-323 2144

Fax:+679 3231511


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