Phone: (+679) 323 2247
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Prof. Sushil Kumar has more than 25 years of experience in research (Atmospheric and Space Physics) and teaching at various universities and Institutes. 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 (pls visit http://webflash.ess.washington.edu/), and later in the areas of Atmospheric electricity, GPS, and terrestrial and Space Weather Hazards such as Tropical Cyclones, Earthquakes, Geomagnetic storms , Solar flares. 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, Asian Office of Aerospace Research and Development, Japan, etc and through the university Strategic Research Theme funding of USP. The technical, scientific & instrumental support has been provided by collaborators.
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.
The teaching interest includes mainly; Electromagnetism, Electronics, Radio Wave Propagation & Applications, Signals and Systems, Electronic Communication Systems along with other wider Physics areas . 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.
Current areas of research interest are;
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.
The Space Weather (http://www.spaceweather.com) 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.
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.
The main aim of this project is to investigate ionospheric disturbances resulting in ionospheric irregularities which are detrimental to HF and satellite communications and satellite based navigations systems such as GPS, GLONASS etc. To successfully achieve the aim of the KEIO project, we are working to install and operate a long-range HF research radar on Kiritimati, Kiribati, which has an ideal location less than 2 degrees from the exact magnetic equator. This research facility is supposed to operate for three years with possible extension of 3 years.
Organizational Experience: Selected Recent
Conveners (Primary Convener-Prof. Xing Meng, Conveners – Prof. Sushil Kumar, Dr. Lucie Rolland, Prof. Steven A Cummer).
Chairs (Xing Meng , Jet Propulsion Laboratory, California Institute of Technology , Sushil Kumar ,The University of the South Pacific).
01 PhD, 11 Masters by Research, and Several PG and UG research projects.
Journals (78), Book chapter (01), Tech. Pub (01), Edited/Refereed Proceedings (10), Conference Presentations (65).
Attended several international and national conferences, symposia, summer schools, and presented more than 60 research papers in conferences.
Recent and Some Sleeted Presentations
Phone: +679-323 2247