Physics – Geophysics
Scientific paper
Dec 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974sao..rept......&link_type=abstract
Semiannual Progress Report, 1 Jul. - 31 Dec. 1974 Smithsonian Astrophysical Observatory, Cambridge, MA.
Physics
Geophysics
Geodetic Satellites, Nasa Programs, Satellite Ground Tracks, Satellite Orbits, Satellite Tracking, Algorithms, Astronomical Observatories, Atmospheric Models, Baker-Nunn Camera, Computer Techniques, Data Processing, Earth & Ocean Physics Applications Program, Geodesy, Geophysics, Laser Ranger/Tracker, Orbit Calculation, Tectonics
Scientific paper
Observations and research progress of the Smithsonian Astrophysical Observatory are reported. Satellite tracking networks (ground stations) are discussed and equipment (Baker-Nunn cameras) used to observe the satellites is described. The improvement of the accuracy of a laser ranging system of the ground stations is discussed. Also, research efforts in satellite geodesy (tides, gravity anomalies, plate tectonics) is discussed. The use of data processing for geophysical data is examined, and a data base for the Earth and Ocean Physics Applications Program is proposed. Analytical models of the earth's motion (computerized simulation) are described and the computation (numerical integration and algorithms) of satellite orbits affected by the earth's albedo, using computer techniques, is also considered. Research efforts in the study of the atmosphere are examined (the effect of drag on satellite motion), and models of the atmosphere based on satellite data are described.
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