Twin probes for space geodesy

Details Twin probes for space geodesy Twin probes for space geodesy

Apr 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978esasp.137..169b&link_type=abstract

In ESA Space Oceanog., Navigation, and Geodyn. p 169-170 (SEE N79-12482 03-42)

Physics

Aerodynamic Drag, Geodesy, Remote Sensors, Spaceborne Experiments, Twinning, Earth (Planet), Gravitational Fields, Neodymium Lasers, Satellite-To-Satellite Tracking, Spacelab, Yag Lasers

Scientific paper

The application of the twin probe method to eliminate the atmospheric drag is described. Two equal pairs of probes - each pair consisting of two passive, small and dense spheres of equal surfaces and different masses - are flown on a circular orbit at an altitude of about 300 km. Each pair determines the motion of an ideal point which feels only the gravitational forces. They are separated by a distance of 100 to 200 km and are tracked from, say, the Spacelab, flying at the same altitude, leading to a measurement of the fine scale structure of the gravity field.

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