A Determination of the Ellipticity of the Earth's Equator from the Motion of Two Satellites

Details A Determination of the Ellipticity of the Earth's Equator from the Motion of Two Satellites A Determination of the Ellipticity of the Earth's Equator from the Motion of Two Satellites

Jan 1961

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1961saosr..56...11i&link_type=abstract

SAO Special Report #56, part 2 (1961)

Physics

Scientific paper

The effect of the most important longitude-dependent term of the geopotential on the motion of artificial satellites is expressed by simple formulas. Its numerical coefficient β can be interpreted as the ellipticity of the earth's equator; the phase constant λX gives the geographical longitude of the semimajor axis. Based on photoreduced Baker-Nunn observations of the Satellites 1959 a1 and 1959 Eta, the values of these constants were determined to be β = (3.21 +/- 0.29) X 10-5 and λX = -33°.15 +/- 0°.53.

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