Theoretical simulation of O+ and H+ concentrations obtained by the indian SROSS C2 satellite in the topside F-region and comparison with the IRI

Diurnal and seasonal variation of topside ionospheric ion density over Indian region at solar minimum and solar maximum

“…They attributed this fact to different E Â B vertical drifts which were observed over the Communication/Navigation Outage Forecast System (C/NOFS) mission during extreme solar minimum. Bhuyan and Kakoty (2002) discussed the theoretical simulation of O + and H + ion density in the Indian low latitude topside ionosphere and also compared the results with the values determined by Indian SROSS C2 satellite and the values predicted by IRI. Equatorial topside ionosphere ion composition during solar minimum has been discussed by González et al (1992), using the observations made from Bennett ion mass spectrometer and retarding potential analyzer on board the Atmosphere Explorer E satellite.…”

Evaluation of the ion-density measurements by the Indian satellite SROSS-C2

“…Several scientific investigations, such as latitudinal distribution, diurnal and seasonal behavior, solar activity dependence and also special features like evening enhancement in temperatures, geomagnetic storm associated variations etc., have been carried out by various workers utilizing the electron and ion temperatures, ion density and ion composition parameters derived from the SROSS‐C2 observations [ Bhuyan and Kakoty , 2002; Bhuyan et al , 2002, 2003, 2004; Paul et al , 2002; Niranjan et al , 2003, 2006; Sharma et al , 2004, 2006; Prabhakaran Nayar et al , 2004; Subrahmanyam et al , 2005]. From the results, it has been noticed that some discrepancies are observed when the absolute ion density values, derived by the ion RPA measurements onboard SROSS‐C2, are compared with those derived from the ground‐based ionosonde observations.…”