A comparison of geomagnetic activity models using Seasat laser range data

Details A comparison of geomagnetic activity models using Seasat laser range data A comparison of geomagnetic activity models using Seasat laser range data

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989p%26ss...37..685m&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 37, June 1989, p. 685-691. Research supported by SERC.

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Atmospheric Models, Geomagnetism, Laser Range Finders, Seasat Satellites, Aerodynamic Drag, Atmospheric Density, Magnetic Storms, Orbital Position Estimation, Solar Radiation, Thermosphere

Scientific paper

The changes in air density linked with geomagnetic disturbance, as predicted by various thermospheric models at heights near 800 km, are compared by analysis of laser range data acquired during the operational lifespan of Seasat. Computations incorporate the satellite-drag-based model J71, its variants proposed by Slowey (1983) Hedin's (1983) MSIS model. Comparisons establish a preference for the simpler J71 model for geomagnetic activity. The introduction of persistence of a geomagnetic event by a weighted average of the preceding geomagnetic activity leads to improvements in J71 for large well-defined storms.

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