Observations of the diurnal dependence of the high-latitude F region ion density by DMSP satellites

Details Observations of the diurnal dependence of the high-latitude F region ion density by DMSP satellites Observations of the diurnal dependence of the high-latitude F region ion density by DMSP satellites

Mar 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.1711s&link_type=abstract

Journal of Geophysical Research, vol. 87, Mar. 1, 1982, p. 1711-1718.

Mathematics

Logic

11

Defense Program, Diurnal Variations, F Region, Ionospheric Ion Density, Meteorological Satellites, Polar Regions, Atmospheric Models, Geomagnetism, Northern Hemisphere, Plasma Density, Southern Hemisphere

Scientific paper

Data from the DMSP F2 and F4 satellites for the period December 5-10, 1979, have been used to study the diurnal dependence of the high-latitude ion density at 800-km altitude. A 24-hour periodicity in the minimum orbital density (MOD) during a crossing of the high-latitude region is observed in both the winter and summer hemispheres. The phase of the variation in MOD is such that it has a minimum during the 24-hour period between 0700 and 0900 UT. Both the long-term variation of the high-latitude ion density on a time scale of days, and the orbit-by-orbit variations at the same geomagnetic location in the northern (winter) hemisphere for the magnetically quiet time period chosen, show good qualitative agreement with the diurnal dependence predicted by a theoretical model of the ionospheric density at high latitudes under conditions of low convection speeds (Sojka et al., 1981).

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