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Geologic analysis of averaged magnetic satellite anomaliesTo investigate relative advantages and limitations for quantitative geologic analysis of magnetic satellite scalar anomalies derived from arithmetic averaging of orbital profiles within equal-angle or equal-area parallelograms, the anomaly averaging process was simulated by orbital profiles computed from spherical-earth crustal magnetic anomaly modeling experiments using Gauss-Legendre quadrature integration. The results indicate that averaging can provide reasonable values at satellite elevations, where contributing error factors within a given parallelogram include the elevation distribution of the data, and orbital noise and geomagnetic field attributes. Various inversion schemes including the use of equivalent point dipoles are also investigated as an alternative to arithmetic averaging. Although inversion can provide improved spherical grid anomaly estimates, these procedures are problematic in practice where computer scaling difficulties frequently arise due to a combination of factors including large source-to-observation distances ( 400 km), high geographic latitudes, and low geomagnetic field inclinations.
Document ID
19850023275
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Goyal, H. K.
(Ohio State Univ. Columbus, OH, United States)
Vonfrese, R. R. B.
(Ohio State Univ. Columbus, OH, United States)
Ridgway, J. R.
(Purdue Univ. Lafayette, Ind., United States)
Hinze, W. J.
(Purdue Univ. Lafayette, Ind., United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1985
Publication Information
Publication: Purdue Univ. Improving the Geol. Interpretation of Magnetic and Gravity Satellite Anomalies
Subject Category
Earth Resources And Remote Sensing
Accession Number
85N31588
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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