Other
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agusmsa31b..02t&link_type=abstract
American Geophysical Union, Spring Meeting 2009, abstract #SA31B-02
Other
2415 Equatorial Ionosphere, 2423 Ionization Processes (7823), 2479 Solar Radiation And Cosmic Ray Effects, 2481 Topside Ionosphere
Scientific paper
Topside ionospheric profile is constructed using simple Chapman-alpha function to connect the ROCSAT observed density at the 600-km altitude to the bottomside ionosphere measured by the ionosonde at Jicamarca. We found that the constructed topside density profiles are almost identical to the Jicamarca ISR measurements in several examples and are all superior to other approaches such as the Huang-Reinisch method and the IRI 2007 model. The local time variation of the effective topside scale height in the Chapman- alpha function for the December solstice in 2003 indicates a low ion temperature in the morning hours that is quite different from the ion temperature measured by ROCSAT at the 600-km altitude where the temperature rises rapidly at sunrise. The discrepancy between the two temperatures can be explained by the vertical variation in the topside ionospheric temperature during the morning hour and is confirmed from a result in the SAM2 model.
Liu Chan Chiang
Su Shangguo
Tulasi Ram S.
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