Climatology of ionospheric high transition height derived from COSMIC satellites during the solar minimum of 2008

Details Climatology of ionospheric high transition height derived from COSMIC satellites during the solar minimum of 2008 Climatology of ionospheric high transition height derived from COSMIC satellites during the solar minimum of 2008

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsa31b1427y&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SA31B-1427

Physics

[2419] Ionosphere / Ion Chemistry And Composition, [2437] Ionosphere / Ionospheric Dynamics, [2481] Ionosphere / Topside Ionosphere, [6994] Radio Science / Instruments And Techniques

Scientific paper

: Recently C/NOFS satellite observations showed that the ionospheric high transition height(where the density of O+ is equal to that of H+) was very low (Heelis et al., Geophys. Res. Lett., 36, L00C03, doi:10.1029/2009GL038652) during the current solar minimum of 2008 when the solar activity was extreme low. The C/NOFS satellite only provides observations at equatorial region because of its low inclination angle (13 degree). In this study, ionospheric electron density profiles from six COSMIC satellites are used to derive the ionospheric high transition height, and then the temporal and spatial variations of the high transition height at the middle and low latitudes are investigated. Our results show that the transition height from COSMIC is in good agreement with Heelis et al's results for the same period. The transition height exhibits significant seasonal, local time, and latitude variations. Finally, a comparison of the COSMIC results with empirical models is also carried out. Our results would be useful for improving the ionospheric topside modeling.

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