Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986asdy.conf..965s&link_type=abstract
IN: Astrodynamics 1985; Proceedings of the Conference, Vail, CO, August 12-15, 1985. Part 2 (A86-43201 20-12). San Diego, CA, Un
Astronomy and Astrophysics
Astronomy
Orbit Calculation, Orbital Position Estimation, Satellite Tracking, Elliptical Orbits, Remote Sensors, Stationary Orbits
Scientific paper
Fundamental singularities, ambiguities, and indeterminancies in the determination of satellite initial orbits from angles-only tracking data are investigated by means of numerical experiments on both simulated data (for ground-based and space-based sensors) and real Baker-Nunn camera data. Results for LEO, GEO, and highly elliptical orbits are presented in tables and graphs and discussed. It is found that two distinct orbits may fit tracking data obtained from space-borne sensors, requiring extensive additional tracking time to resolve the ambiguity. Singularities in the orbit determination when sensor and satellite are in parallel or coplanar orbits are shown to be problem-inherent and solution-method-inherent, respectively. Recommendations for improving the orbit-determination process are included.
Layne J. D.
Schinnerer R. G.
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