Other
Scientific paper
Jan 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84...31f&link_type=abstract
Journal of Geophysical Research, vol. 84, Jan. 1, 1979, p. 31-35.
Other
Accelerometers, Atmospheric Tides, Diurnal Variations, Electrostatic Probes, Explorer 55 Satellite, Spaceborne Experiments, Thermosphere, Atmospheric Composition, Atmospheric Density, Error Analysis, Tropical Regions
Scientific paper
Total mass density data from the miniature electrostatic accelerometer (Mesa) experiment on Atmospheric Explorer-E are analyzed to determine diurnal and semidiurnal variations in the lower thermosphere at low latitudes. The local time density structure changes from predominantly semidiurnal below 180 plus or minus 5 km to predominantly diurnal above this transition height, with no strong dependence on season. However, diurnal phases in summer occur 6 hours (at low heights) to one-and-one-half hours (at higher heights) earlier than winter, while semidiurnal phases during summer occur from 1 hour (at low heights) to 6 hours (at higher heights) later than winter. Results are compared with analyses of AE-E data by other investigators and with recent empirical and theoretical models of thermospheric composition and density.
Forbes Jeffrey M.
Marcos Frank A.
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