Studies of electron and ion temperatures at 500km altitude during sunrise using Indian SROSS C2 satellite

Variation of ionospheric electron and ion temperatures during periods of minimum to maximum solar activity by the SROSS-C2 satellite over Indian low and equatorial latitudes

“…Present study is different from that of the study of other researcher (Bhuyan et al, 2002(Bhuyan et al, , 2004(Bhuyan et al, , 2006Aggarwal et al, 2009) in various aspects using the same satellite data set. Aggarwal et al (2009) chose the data only for sunrise period for the equatorial region from 10°S to 20°N.…”

“…They found that the pre-sunrise enhancement in the ion temperature in between 4:00 and 6:00 LT and also found that an afternoon enhancement of lower amplitude is also observed in summer season. Aggarwal et al (2009) have studies of electron and ion temperatures at 500 km altitude during the sunrise using the same satellite data set as that in the present study. They found that in winter the morning overshoot in electron temperature enhances to 4000 K is observed around 6:00 LT during low solar activity and it was slightly lower during higher solar activity.…”

“…Aggarwal et al (2009) chose the data only for sunrise period for the equatorial region from 10°S to 20°N. However, in the present study we have chosen the satellite data for whole Indian region (from 5°S to 20°N geomagnetic latitude and from 137°E to 168°E geomagnetic longitude) to study the variation of ionospheric electron and ion temperatures during minimum to maximum solar activity.…”

“…Another advantage of SROSS-C2 mission is that the orbit is just above the F-region electron density peak and the orbital ellipticity is much less. Many researchers (Bhuyan et al, 2002(Bhuyan et al, , 2004(Bhuyan et al, , 2006Aggarwal et al, 2009) have also used the SROSS-C2 satellite data to study the behavior of ionospheric parameters. Bhuyan et al (2004) studied the diurnal, seasonal and latitudinal variations of the ion temperature using the SROSS-C2 satellite data in the Indian zone equatorial and low latitude ionosphere at an average altitude 500 km.…”

“…This region was chosen on the basis of maximum passes of SROSS-C2 over India. Bhuyan et al (2004Bhuyan et al ( , 2006 have chosen the same study region as that by Aggarwal et al (2009) to study the diurnal, seasonal and latitudinal variations of electron and ion temperatures. Bhuyan et al (2004) have also studied the latitudinal variation during day time for the year from 1994 to 1998.…”