Precision orbit computations for Starlette
- 24 Downloads
The Starlette satellite, launched in February 1975 by the French Centre National d’Etudes Spatiales, was designed to minimize the effects of non-gravitational forces and to obtain the highest possible accuracy for laser range measurements. Analyses of the first four months of laser tracking data from nine stations. have confirmed the stability of the orbit and the precision to which the satellite’s position can be established.
Initial orbit computations using the GSFC GEM-7 gravity model produced rms fits of about 8 to 10 meters for arc lengths of 5 days. After tailoring a gravity model specifically to Starlette, the rms fits for the 5 day arcs were reduced significantly to the 1 to 2 meter level. An rms fit of 4.3 meters was obtained for a 90 day arc. Five day arcs overlapped by 2.5 days showed rms satellite position differences generally less than 2 meters. Prediction errors at the end of two months were less than 30 milliseconds.
KeywordsGravity Model Solar Radiation Pressure Range Bias Laser Data Goddard Space Flight Center
Unable to display preview. Download preview PDF.
- 1.L.C. CARPENTER: “Laser Tracking Data Processing”, EOS Transactions of the American Geophysical Union, Volume 57, No. 4, p. 235, 1976.Google Scholar
- 2.Centre National d’Etudes Spatiales, Groupe de Recherches de Géodésie Spatiale, “Starlette”, Toulouse, France, February 1975.Google Scholar
- 3.LG. JACCHIA: “Static Diffusion Models of the Upper Atmosphere with Empirical Temperature Profiles”, SAO Spec. Rep. 170, Smithson. Inst. Astrophys. Observ., Cambridge, Mass., 1965.Google Scholar
- 4.L.G. JACCHIA: “New Static Models of the Thermosphere end Exosphera with Empirical Temperature Profiles”, SAO Spec. Rep. 313, Smithson. Inst. Astrophys. Observ., Cambridge, Mass., 1970.Google Scholar
- 5.LG. JACCHIA: “Revised Static Models of the Thermosphere and Exosphere with Empirical Temperature Profiles”, SAO Spec. Rap. 332, Smithson. Inst. Astrophys. Observ., Cambridge, Mass., 1971.Google Scholar
- 6.LG. JACCHIA, I.G. CAMPBELL, and J.W. SLOWLEY: “Semi-Annual Density Variations in the Upper Atmosphere”, 1958 to 1966, SAO Spec. Rep. 265, Smithson. Inst, Astrophys. Observ., Cambridga, Mass., 1968.Google Scholar
- 7.W.M. KAULA: “Theory of Satellite Geodesy”, Blaisdell Publishing Company, Waltham, Mass., 1966.Google Scholar
- 8.J.G. MARSH, B.C. DOUGLAS, and S.M. KLOSKO: “A Global Station Coordinate Solution Based Upon Camera and Laser Data — GSFC-1973”, Proceedings of the International Symposium on the Use of Artificial Satellites for Geodesy and Geodynamics, National Technical University, Athens, pp. 749–799, 1973.Google Scholar
- 9.J.G. MARSH, B.C. DOUGLAS, D.M. WALLS: “A Catalog of Station Coordinates for GEOS-C Orbit Determination”, Bulletin Geodesique, No. 117, September 1975.Google Scholar
- 10.T.V. MARTIN: “GEOOYN Systems Operations Description”, Final Report on Contract NAS 5-11736-129, WOLF Research and Development Corp., Riverdale, Md., February 1972.Google Scholar
- 11.C.A. WAGNER, B.C. DOUGLAS, R.G. WILLIAMSON: “The ROAD Program”, GSFC Document X-921-74-144, 1974.Google Scholar