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Book Chapter

Sonwalkar, VS. 1995. Chapter 13 of Handbook of Atmospheric Electrodynamics. Handbook of Atmospheric Electrodynamics. II

Sonwalkar, VS. 1990. Lightning, whistlers, and hiss - A possible relationship. Physics of Space Plasmas (1989). :477-482.

Conference Paper

Benson, R F, Webb P A, Green JL, Carpenter DL, Sonwalkar VS, James H G, Reinisch BW. 2006. Active Wave Experiments in Space Plasmas: The Z Mode. Geospace Electromagnetic Waves and Radiation. 687:3.

Journal Article

Masson, A, Santol\'ık O, Carpenter DL, Darrouzet F, Décréau PME, El-Lemdani Mazouz F, Green JL, Grimald S, Moldwin MB, N\v emec F et al.. 2009. Advances in Plasmaspheric Wave Research with CLUSTER and IMAGE Observations. Space Science Reviews. 145:137-191.

Sonwalkar, VS, Inan US, Bell TF, Helliwell RA, Molchanov O A, Green JL. 1994. DE 1 VLF observations during Activny wave injection experiments. Journal of Geophysical Research. 99:6173-6189.

Bell, TF, Inan US, Lauben D S, Sonwalkar VS, Helliwell RA, Sobolev Y P, Chmyrev V M, Gonzalez S. 1994. DE-1 and COSMOS 1809 observations of lower hybrid waves excited by VLF whistler mode waves. Geophysical Research Letters. 21:653-656.

Bell, TF, Inan US, Sonwalkar VS, Helliwell RA. 1991. DE-1 observations of lower hybrid waves excited by VLF whistler mode waves. Geophysical Research Letters. 18:393-396.

Sonwalkar, VS, Carpenter DL, Bell TF, Spasojevic M, Inan US, Li J, Chen X, Venkatasubramanian A, Harikumar J, Benson R F et al.. 2004. Diagnostics of magnetospheric electron density and irregularitiesat altitudes <5000 km using whistler and Z mode echoes from radio sounding on the IMAGE satellite. Journal of Geophysical Research (Space Physics). 109:11212.

Sonwalkar, VS, Bell TF, Helliwell RA, Inan US. 1984. Direct multiple path magnetospheric propagation - A fundamental property of nonducted VLF waves. Journal of Geophysical Research. 89:2823-2830.

Sonwalkar, VS, Inan US, Aggson T L, Farrell W M, Pfaff R. 1995. Focusing of nonducted whistlers by the equatorial anomaly. Journal of Geophysical Research. 100:7783-7790.

Sonwalkar, VS, Inan US, Bell TF. 1995. An interpretation of a mysterious 3.0- to 4.6-kHz emission band observed on Voyager 2 near Neptune. Journal of Geophysical Research. 100:1795-1809.

Sonwalkar, VS, Inan US. 1989. Lightning as an embryonic source of VLF hiss. Journal of Geophysical Research. 94:6986-6994.

Draganov, A B, Inan US, Sonwalkar VS, Bell TF. 1992. Magnetospherically reflected whistlers as a source of plasmaspheric hiss. Geophysical Research Letters. 19:233-236.

Sonwalkar, VS, Carpenter DL. 1995. Notes on the diversity of the properties of radio bursts observed on the nightside of Venus. Journal of Atmospheric and Terrestrial Physics. 57:557-573.

Carpenter, DL, Sonwalkar VS, Helliwell RA, Walt M, Inan US, Ikeda M, Caudle D L. 1997. Probing properties of the magnetospheric hot plasma distribution by whistler mode wave injection at multiple frequencies: Evidence of spatial as well as temporal wave growth. Journal of Geophysical Research. 102:14355-14362.

Sonwalkar, VS, Carpenter DL, Helliwell RA, Walt M, Inan US, Caudle D L, Ikeda M. 1997. Properties of the magnetospheric hot plasma distribution deduced from whistler mode wave injection at 2400 Hz: Ground-based detection of azimuthal structure in magnetospheric hot plasmas. Journal of Geophysical Research. 102:14363-14380.

Carpenter, DL, Galand M, Bell TF, Sonwalkar VS, Inan US, LaBelle J, Smith A J, Clark T D G, Rosenberg TJ. 1997. Quasiperiodic łt}formula\gt\~5-60s fluctuations of VLF signals propagating in the Earth-ionosphere waveguide: A result of pulsating auroral particle precipitation? Journal of Geophysical Research. 102:347-362.

Henderson, T R, Sonwalkar VS, Helliwell RA, Inan US, Fraser-Smith A C. 1993. A search for ELF/VLF emissions induced by earthquakes as observed in the ionosphere by the DE 2 satellite. Journal of Geophysical Research. 98:9503-9514.

Sonwalkar, VS, Inan US, Bell TF, Helliwell RA, Chmyrev V M, Sobolev Y P, Ovcharenko O Y, Selegej V. 1994. Simultaneous observations of VLF ground transmitter signals on the DE 1 and COSMOS 1809 satellites: Detection of a magnetospheric caustic and a duct. Journal of Geophysical Research. 99:17511-17522.

Sonwalkar, VS, Carpenter DL, Strangeway R J. 1991. Testing radio bursts observed on the nightside of Venus for evidence of whistler mode propagation from lightning. Journal of Geophysical Research. 96:17763.

Sonwalkar, VS, Inan US. 1988. Wave normal direction and spectral properties of whistler mode hiss observed on the DE 1 satellite. Journal of Geophysical Research. 93:7493-7514.

Sonwalkar, VS, Chen X, Harikumar J, Carpenter DL, Bell TF. 2001. Whistler-mode wave-injection experiments in the plasmasphere with a radio sounder. Journal of Atmospheric and Solar-Terrestrial Physics. 63:1199-1216.

Draganov, A B, Inan US, Sonwalkar VS, Bell TF. 1993. Whistlers and plasmaspheric hiss - Wave directions and three-dimensional propagation. Journal of Geophysical Research. 98:11401.

Sonwalkar, VS, Helliwell RA, Inan US. 1990. Wideband VLF electromagnetic bursts observed on the DE 1 satellite. Geophysical Research Letters. 17:1861-1864.

Carpenter, DL, Bell TF, Inan US, Benson R F, Sonwalkar VS, Reinisch BW, Gallagher DL. 2003. Z-mode sounding within propagation ``cavities'' and other inner magnetospheric regions by the RPI instrument on the IMAGE satellite. Journal of Geophysical Research (Space Physics). 108:1421.