Global distribution of crustal magnetization discovered by the Mars Global Surveyor MAG/ER experiment

Science

Volumn 284, Issue 5415, 1999, Pages 790-793

  Acuna M H ^a   Connerney, J E P ^a   Ness, N F ^b   Lin, R P ^c   Mitchell, D ^c   Carlson, C W ^c   McFadden, J ^c   Anderson, K A ^c   Reme H ^d   Mazelle, C ^d   Vignes, D ^d   Wasilewski, P ^a   Cloutier, P ^e  

^a NASA GODDARD SPACE FLIGHT CENTER   (United States)

^b UNIVERSITY OF DELAWARE   (United States)

^c UNIVERSITY OF CALIFORNIA   (United States)

^d IRAP   (France)

^e RICE UNIVERSITY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

CRUST; MAGNETIZATION; MARS;

ARTICLE; ASTRONOMY; ELECTRON; MAGNETIC FIELD; PRIORITY JOURNAL; REFLECTOMETRY; WIND;

EID: 17744416393     PISSN: 00368075     EISSN: None     Source Type: Journal    
DOI: 10.1126/science.284.5415.790     Document Type: Article

References (23)

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4. The measurement error is determined primarily by incomplete knowledge of spacecraft-generated magnetic fields. These are associated with the electrical power system and uncompensated permanent magnets present in amplifiers mounted behind the spacecraft high gain antenna. During the cruise phase, spacecraft maneuvers in a fixed solar panel orientation were used to determine the instrument offsets to an estimated accuracy of 0.5 nT. In the aerobraking orbits, frequent spacecraft reconfigurations and articulations of the solar panels degrade the accuracy of the error estimate yielding the value quoted in the paper. The twin magnetometer configuration is used to identify spacecraft-generated magnetic fields and distinguish them from ambient field changes.
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23. We thank the Mars Global Surveyor Project Office and the Mission Operations Team at JPL and Lockheed Martin Astronautics for the extraordinary efforts made to collect magnetic field data at periapsis during the second aerobraking phase. The contributions of D. W. Curtis, M. Kaelberer, D. Brain, F. Perin, and P. Lawton to the processing display and analysis of the magnetic field data are gratefully acknowledged. The research at UC Berkeley was supported by NASA grant NAG-5-959. N.F.N. acknowledges support in part by NASA grant NAG-5-3538.