Determination of resonant geopotential terms using optical observations of geostationary satellites

Details Determination of resonant geopotential terms using optical observations of geostationary satellites Determination of resonant geopotential terms using optical observations of geostationary satellites

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999adspr..23..767h&link_type=abstract

Advances in Space Research, Volume 23, Issue 4, p. 767-770.

Astronomy and Astrophysics

Astronomy

Scientific paper

The ellipticity of the Earth's equator causes a resonant librational motion of geostationary satellites. Combining astrometric observations of Meteosat satellites from Zimmerwald (Switzerland) and Graz-Lustbühel (Austria), the resonant geopotential terms C22 and S22 were determined. The accuracy of the parameters provided by the limited campaign is close to that achieved in JGM-3. The comparatively simple observation and reduction technique offers a useful alternative method to monitor the values of the resonant geopotential terms C22 and S22 in order to determine possible time variations or to assess upper limits for variations.

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