Diurnal, seasonal and latitudinal variations of ion temperature measured by the SROSS C2 satellite in the Indian zone equatorial and low latitude ionosphere and comparison with the IRI

Details Diurnal, seasonal and latitudinal variations of ion temperature measured by the SROSS C2 satellite in the Indian zone equatorial and low latitude ionosphere and comparison with the IRI Diurnal, seasonal and latitudinal variations of ion temperature measured by the SROSS C2 satellite in the Indian zone equatorial and low latitude ionosphere and comparison with the IRI

Feb 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004jastp..66..301b&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 66, Issue 3-4, p. 301-312.

Physics

6

Ionosphere, Ion Temperature, Sross C2, Iri

Scientific paper

The diurnal, seasonal and latitudinal variations of ion temperature (Ti) measured by the Indian SROSS C2 satellite at equatorial and low latitudes along 75°E during the solar minimum period of January 1995 to December 1996 are investigated. The satellite covered the latitude belt of 31°S-34°N within the longitude range of 40°-100°E at an average altitude of ~500km. Measured Ti varies between 600 and 700K during nighttime (20:00-04:00 LT) and between 1000 and 1100K around noon. Enhancement in Ti upto ~3000K occurs in the pre-sunrise hours (04:00-06:00 LT). An afternoon increase of about ~200K over the daytime value is observed between 15:00 and 17:00 LT in summer. Latitudinal gradients in Ti have been observed during the period of morning and afternoon enhancements. The ion temperature also exhibits large variability. Comparison of observed and International Reference Ionosphere (IRI) predicted ion temperature reveals that the IRI overestimates Ti at about all local times and latitudes except during the periods of enhanced Ti.

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