Contour maps of lunar remanent magnetic fields

Details Contour maps of lunar remanent magnetic fields Contour maps of lunar remanent magnetic fields

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.1055h&link_type=abstract

Journal of Geophysical Research, vol. 86, Feb. 10, 1981, p. 1055-1069.

Physics

29

Lunar Crust, Lunar Magnetic Fields, Magnetic Anomalies, Remanence, Selenology, Thematic Mapping, Apollo 15 Flight, Apollo 16 Flight, Magnetometers, Satellite-Borne Instruments, Moon, Maps, Magnetic Fields, Remanent Magnetization, Anomalies, Data, Reiner Gamma, Van De Graaff, Gerasimovich, Data Reduction, Procedure, Apollo 15 Subsatellite, Apollo 16 Subsatellite, Analysis, Magnetometer, Mapping

Scientific paper

The 2605 usable orbits of Apollo 15 and 16 subsatellite magnetometer data have been reexamined for intervals suitable for analysis of crustal magnetic anomalies. To minimize plasma-related disturbances, segments from 274 of these orbits were selected from times when the moon was either in a lobe of the geomagnetic tail or in the solar wind with the subsatellites in the lunar wake. External field contributions which remained in the selected intervals were minimized by (1) quadratic detrending of individual orbit segments with lengths much greater than anomaly wavelengths and (2) two-dimensional filtering with minimum passed wavelengths less than or equal to anomaly wavelengths. Improvements in coverage, accuracy, and resolution of previously published anomaly maps produced from these data are obtained. In addition to improved maps of the Reiner Gamma and Van de Graaff-Aitken anomalies studied previously, a third region of relatively high-amplitude anomalies centered near the crater Gerasimovich on the southeastern far side has been mapped. Both the Van de Graaff-Aitken region and the Gerasimovich region are marked by the general occurrence of extensive groups of Reiner Gamma-type swirls.

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