Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsa72b0527z&link_type=abstract
American Geophysical Union, Fall Meeting 2002, abstract #SA72B-0527
Physics
2427 Ionosphere/Atmosphere Interactions (0335), 2443 Midlatitude Ionosphere, 2467 Plasma Temperature And Density, 6952 Radar Atmospheric Physics
Scientific paper
In order to develop ionospheric empirical models of electron density Ne, plasma temperatures (Te and Ti) and ion drifts based on Millstone Hill incoherent scatter radar observations, we investigate an important issue of ionospheric responses to the solar flux changes that have to be quantitatively represented. The representation is associated with selecting a mathematical function where a suitable solar flux index at a proper time ahead the observing time has to be determined. Traditionally, the solar 10.7 cm flux F107 for the previous day is applied, and a linear function is used. However, the non-linear feature of Ne responses to the solar flux was discovered previously. This paper shows the development of the non-linear feature with altitude, season and local time, and also indicates the non-linear feature for the Te and Ti responses. A mathematical function is proposed. We also discuss the use of other solar flux indices, in addition to F107.
Holt John M.
Zhang Sheng
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