Subrahmanyam, P. and Jain, A. R. and Maini, H. K. and Bahl, M. and Das, Rupesh M. and Garg, S. C. and Niranjan, K. (2010) Evaluation of the ion‐density measurements by the Indian satellite SROSS‐C2. Radio Science, 45. RS6009-1. ISSN 0048–6604

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Abstract

The ion and electron F region plasma measurements made by the ion and electron Retarding Potential Analyzers (RPAs) onboard the Indian satellite SROSS‐C2, have yielded excellent data set over the Indian region for more than half a solar cycle, after the SROSS‐C2 launch in May 1994. The absolute ion density, ion temperature, and ion composition parameters are derived from these in situ measurements and used by many workers. In this paper the absolute values of ion density derived from the ion RPA measurements are compared and evaluated with the measurements made by ground‐based ionosondes located in the Indian region and close to the SROSS‐C2 orbital path. It is shown that a slight adjustment in efficiency factor of the ion RPA sensor brings the in situ measurements much closer to those obtained from the ground‐based ionosonde measurements taking into account the model calculations. It may be mentioned that this is a correction to the ion density measurement by SROSS‐C2 by a fixed proportion (14–11.4%). The effect of change in efficiency factor on the ion current, which is used to deduce the ion number density, is demonstrated and discussed.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s American Geophysical Union.
Subjects:	Geochemistry/ Geophysics Meteorology & Atmospheric Sciences Remote Sensing Telecommunications Astronomy & Astrophysics
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	17 Apr 2012 08:44
Last Modified:	17 Apr 2012 08:44
URI:	http://npl.csircentral.net/id/eprint/144

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