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Record Details

Record 17 of 2126
A geomagnetic field spectrum
Author and Affiliation:
Langel, R. A.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Estes, R. H.(Business and Technological Systems, Inc., Seabrook, MD, United States)
Abstract: 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.
Publication Date: Apr 01, 1982
Document ID:
19820047244
(Acquired Nov 30, 1995)
Accession Number: 82A30779
Subject Category: GEOPHYSICS
Document Type: Journal Article
Publication Information: Geophysical Research Letters; 9; Apr. 198
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Business and Technological Systems, Inc.; Seabrook, MD, United States
Description: 4p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: GEOMAGNETISM; MAGSAT SATELLITES; SATELLITE SOUNDING; SPHERICAL HARMONICS; POWER SPECTRA; SCALARS; VECTOR ANALYSIS
Imprint And Other Notes: Geophysical Research Letters, vol. 9, Apr. 1982, p. 250-253.
Miscellaneous Notes: p. 250-253
Availability Source: Other Sources
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