Small-scale features in the earth's magnetic field observed by Magsat

Details Small-scale features in the earth's magnetic field observed by Magsat Small-scale features in the earth's magnetic field observed by Magsat

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984jgr....89.1070c&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 89, Feb. 10, 1984, p. 1070-1076.

Physics

59

Geomagnetism, Magnetic Anomalies, Magnetic Field Configurations, Satellite Observation, Magsat Satellites, Polar Regions, Spherical Harmonics, Tropical Regions

Scientific paper

A spherical harmonic expansion to degree and order 29 is derived using a selected magnetically quiet sample of Magsat data. Global maps representing the contribution due to terms of the expansion above n = 13 at 400 km altitude are compared with previously published residual anomaly maps and shown to be similar, even in polar regions. An expansion with such a high degree and order displays all but the sharpest features seen by the satellite and gives a more consistent picture of the high-order field structure at a constant altitude than do component maps derived independently.

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