Satellite-tracking and Earth dynamics research programs

Details Satellite-tracking and Earth dynamics research programs Satellite-tracking and Earth dynamics research programs

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982sao..reptr.....&link_type=abstract

Semiannual Progress Report, 1 Jul. - 31 Dec. 1981 Smithsonian Astrophysical Observatory, Cambridge, MA.

Physics

Geophysics

Earth Movements, Earth Rotation, Geodynamics, Geophysical Observatories, Geophysical Satellites, Satellite Tracking, Accuracy, Data Acquisition, Earth Crust, Geophysics, Instrument Errors, Lageos (Satellite), Laser Range Finders, Maintenance, Minicomputers, Polar Wandering (Geology), Upgrading

Scientific paper

The activities carried out by the Smithsonian Astrophysical Observatory (SAO) are described. The SAO network continued to track LAGEOS at highest priority for polar motion and Earth rotation studies, and for other geophysical investigations, including crustal dynamics, Earth and ocean tides, and the general development of precision orbit determination. The network performed regular tracking of several other retroreflector satellites including GEOS-1, GEOS-3, BE-C, and Starlette for refined determinations of station coordinates and the Earth's gravity field and for studies of solid Earth dynamics. A major program in laser upgrading continued to improve ranging accuracy and data yield. This program includes an increase in pulse repetition rate from 8 ppm to 30 ppm, a reduction in laser pulse width from 6 nsec to 2 to 3 nsec, improvements in the photoreceiver and the electronics to improve daylight ranging, and an analog pulse detection system to improve range noise and accuracy. Data processing hardware and software are discussed.

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