I am an ionospheric physicist who uses radio techniques to study the Earth's and Planetary ionospheric & atmospheric system. My research interest involves :
• Use of Radio Occultation (RO) technique to study Planetary and the Earth's Ionosphere & atmosphere
• Use of Radio signals from GSAT and GNSS radio signals to study the Earth's ionospheric system and its response to the space weather events
• Development of ionospheric model (both the first-principle, and data based semi-empirical models) for Indian low latitude region.
• Use of coherent backscatter VHF/ HF radar to study the Earth's electrodynamics
• Study of atmospheric dynamical processes including QBO, ENSO, gravity waves, convection processes to study coupling between the Earth's different atmospheric regions.
Head, Radio Science and Ionospheric Modelling (RSIM) Section, SPL, VSSC
Scientist/Engineer SG, SPL, VSSC: January 2020 – Present
Scientist/Engineer SF, SPL, VSSC: January 2014 – December 2019
Scientist/Engineer SE, SPL, VSSC: December 2007 – December 2013
Professional Research Associate, ISAS, University of Saskatchewan, Canada: August 2004 – November 2007
Postdoctoral Fellow, University of Western Ontario, Canada: January 2002 – July 2004
Research Associate, NPL, New Delhi: December 1999 – December 2001
Extended SRF (CSIR), NPL, New Delhi: December 1998 – November 1999
Project Associate, NPL, New Delhi: November 1997 – November 1998
Senior Research Fellow (CSIR), NPL, New Delhi: November 1994 – October 1997
Junior Research Fellow (CSIR-NET), NPL, New Delhi: November 1992 – October 1994
Scientific Referee for journals including:
Journal of Atmospheric Solar Terrestrial Physics (JASTP)
The Astrophysical Journal (ApJ)
Geophysical Research Letters (GRL)
Space Weather
Monthly Notices of the Royal Astronomical Society (MNRAS)
Journal of Geophysical Research (JGR)
Advances in Space Research (ASR)
Collaborator and Lead Scientist, ISRO-JAXA Akatsuki Mission Radio Science Program
Chair, Indian National URSI Commission E: 2014–2018
Convener, Inter-Center Experts' Committee for VHF Radar at SPL
Member, Technical and Scientific Committees:
SPL – Internal Review and Academic Committees
GPS-ROS (ROSA) and GROS for Megha-Tropiques
Operationalization of GPS Radiosonde for GSLV-PSLV
Algorithm Working Group for GAGAN
National Merit Scholarship, Govt. of Bihar: 1981
CSIR/UGC NET Qualified, CSIR India: 1991
Postdoctoral Fellowship, NSERC, Canada: 2002
CV_Raj_Jul2025.pdf