The observational basis for JPL's DE 200, the planetary ephemerides of the Astronomical Almanac

Details The observational basis for JPL's DE 200, the planetary ephemerides of the Astronomical Almanac The observational basis for JPL's DE 200, the planetary ephemerides of the Astronomical Almanac

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...233..252s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 233, no. 1, July 1990, p. 252-271.

Astronomy and Astrophysics

Astronomy

172

Astronomical Catalogs, Celestial Mechanics, Planet Ephemerides, Orbital Elements, Sky Surveys (Astronomy), Solar System

Scientific paper

This paper documents the planetary observational data used in a series of ephemerides produced at JPL over six years preceding the creation of DE118/LE62, the set which transformed directly into the JD2000-based set, DE200/LE200. Details of the data reduction procedures are presented, and techniques to overcome the uncertainties due to planetary topography are described. For the spacecraft data, the basic reductions are augmented by formulations for locating the transponder, whether in orbit or landed on the surface of a planet.

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