Mathematics
Scientific paper
Sep 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979p%26ss...27.1137f&link_type=abstract
Planetary and Space Science, vol. 27, Sept. 1979, p. 1137-1149.
Mathematics
12
Long Term Effects, Magnetopause, Solar Wind, Wind Pressure, Data Acquisition, Geomagnetism, Heos Satellites, Imp, Interplanetary Magnetic Fields, Ogo-5, Proton Density (Concentration), Satellite-Borne Instruments, Solar Protons
Scientific paper
The paper provides, for the first time, a three-dimensional representation of the average position and shape of the dayside and the near-earth tail magnetopause on the basis of a large number of observations. This is achieved by combining HEOS-2 data obtained mainly at high latitudes (1972-1974) with low-latitude magnetopause crossing from different spacecraft such as HEOS-1 (1968-1969), OGO-5 (1969) and several IMP spacecraft. The data used are described, and the corresponding mathematical fit is discussed. Calculated magnetopause surfaces providing the best fit to the observations in the geocentric-solar-ecliptic and the solar magnetic coordinate systems are presented. In each case, fits to the total data set and to the data after normalizing them to the same solar wind dynamical pressure are given and the results discussed. Major results are presented for the best fit magnetopause, the tilt of the axis of symmetry of the magnetopause surface, a comparison of the fitted magnetopause in solar magnetic coordinates with the model of Choe et al. (1973), and changes in the average shape of the magnetopause.
Domingo Vicente
Formisano Vittorio
Wenzel Klaus-Peter
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