The resolution of a magnetic anomaly map expected from GRM data

Details The resolution of a magnetic anomaly map expected from GRM data The resolution of a magnetic anomaly map expected from GRM data

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985grm..nasa...52s&link_type=abstract

In NASA, Washington Geopotential Res. Mission (GRM) p 52-53 (SEE N86-12852 03-46)

Mathematics

Logic

Geomagnetism, Geopotential, Lithosphere, Magnetic Anomalies, Maps, Satellite Observation, Bandpass Filters, Diurnal Variations, Earth Planetary Structure, Electromagnetic Wave Filters, Magsat Satellites

Scientific paper

Data from the MAGSAT mission were used to derive a global scalar magnetic anomaly map at an average altitude of about 400 km. It was possible to work with 2 data sets corresponding to dawn and dusk. The anomalies which were repeatable at dawn and at dusk was identified and the error limits of these anomalies were estimated. The repeatable anomalies were downward continued to about 10 km altitude. The anomalies over Canada were correlated quantitatively with bandpass filtered magnetic anomalies derived from aeromagnetic surveys. The close correlation indicates that the repeatable anomalies detected from orbit are due to geological causes. This correlation supports the geological significance of the global anomaly map.

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