First Viking results - Magnetic field measurements

Details First Viking results - Magnetic field measurements First Viking results - Magnetic field measurements

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988phys...37..479p&link_type=abstract

Physica Scripta (ISSN 0031-8949), vol. 37, no. 3, March 1988, p. 479-481. Navy-supported research.

Physics

1

Earth Magnetosphere, Geomagnetism, Magnetic Measurement, Satellite Attitude Control, Swedish Space Program, Birkeland Currents, Magnetic Field Configurations, Magnetometers, Magnetosphere-Ionosphere Coupling, Polar Cusps

Scientific paper

The magnetic field experiment on the Swedish Viking satellite consists of a triaxial fluxgate magnetometer system with the sensors mounted on a 2-m boom. Transverse magnetic field perturbations are readily observed which identify the large-scale auroral and cusp-region Birkeland current (BC) systems. A sharp gradient was observed in the dayside region near apogee and 08:40 MLT during a pass on March 25, 1986 which has been interpreted as an earthward-flowing BC of 8 micro-A/sq m. When projected to ionospheric altitudes it is estimated that the current density is 200 micro-A/sq m.

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