Publication Date:
1979-01-01
Description:
Preliminary models of the annual variations of He, N, O, N2, and Ar were derived from the neutra1/ion mass spectrometer (NIMS) data of AEROS-A and AEROS-B in the altitude range 220-550 km. The period covered by AEROS-A extends from December 26, 1972 to August 9, 1973 at the local times 3 and 15 hr, while AEROS-B represents very quiet solar conditions (〈F10.7〉=81) during July 23, 1974 to September 24, 1975 at 4 and 16 hr local time. Using the analytical framework of the OGO-6 model, the number densities of the constituents were expanded into spherical harmonics with the exospheric temperature inferred from N2 observations under the assumption of diffusive equilibrium. © 1979, Society of Geomagnetism and Earth, Planetary and Space Sciences. All rights reserved.
Print ISSN:
0022-1392
Topics:
Geosciences
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