Computer Science – Sound
Scientific paper
Apr 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982georl...9..250l&link_type=abstract
Geophysical Research Letters, vol. 9, Apr. 1982, p. 250-253.
Computer Science
Sound
140
Geomagnetism, Magsat Satellites, Satellite Sounding, Spherical Harmonics, Power Spectra, Scalars, Vector Analysis
Scientific paper
A spherical harmonic model of the earth's internal magnetic field of degree and order 23 is derived from selected Magsat data, and its power spectrum, computed with terms developed by Mauersberger (1956) and Lowes (1974), is found to exhibit a change of a slope at n = 14 which is interpreted as an indication that the core field dominates at values lower than 13 while the crust field dominates above a value of 15. The representations of the two portions of the spectrum obtained can be used to establish order-of-magnitude inaccuracies due to both crustal fields and the inability to observe core field wavelengths beyond n = 13, at which point they are obscured by the crustal field, in core field models.
Estes Ronald H.
Langel Robert A.
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