Studies of electron and ion temperatures at 500 km altitude during sunrise using Indian SROSS C2 satellite |
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Authors: | Malini Aggarwal H.P. Joshi K.N. Iyer M.N. Jivani |
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Affiliation: | 1. Department of Physics, Saurashtra University, Rajkot 360 005, India;2. Department of Electronics, Saurashtra University, Rajkot 360 005, India |
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Abstract: | Solar dependence of electron and ion temperatures (Te and Ti) in the ionosphere is studied using RPA data onboard SROSS C2 at an altitude of ∼500 km and 77°E longitude during early morning hours (04:00–07:00 LT) for three solar activities: solar minimum, moderate and maximum during winter, summer and equinox months in 10°S–20°N geomagnetic latitude. In winter the morning overshoot phenomenon is observed around 06:00 LT (Te enhances to ∼4000 K) during low-solar activity and to Te ∼ 3800 K, during higher solar activity. In summer, it is observed around 05:30 LT, but the rate of Te enhancement is higher during moderate solar activity (∼2700 K/hr) than the low-solar activity (∼1700 K/hr). During equinox, this phenomenon is delayed and is observed around 06:00 LT (∼4200 K) during all three activities. |
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Keywords: | SROSS C2 Electron temperature Ion temperature Morning overshoot Solar activity |
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