Magnetospheric electron temperatures inferred from whistler observations at low latitudes

Abstract

Whistler observations during night times made at low latitude Indian ground stations Jammu (geomag.lat.22° 26'N; L= 1.17), Nainital(geomag.lat., 19° 1' N; L= 1.16) and Varanasi (geomag.lat., 14°55'N; L = 1.11) are used to deduced electron temperatures in the vicinity of the magnetospheric equator. The accurate curve fitting and parameter estimation technique are used to compute nose frequency and equatorial electron densities from the dispersion measurements of short whistlers recorded at Jammu, Nainital and Varanasi. These computed parameters are further used to estimate the magnetospheric electron temperatures from the dispersion analysis of short whistlers observed at low latitudes which are in good agreement with the results reported by other workers. © 2008 IACS.