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The observational basis for JPL's DE 200, the planetary ephemerides of the Astronomical AlmanacThis 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.
Document ID
19900065398
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Standish, E. M., Jr.
(JPL Pasadena, CA, United States)
Date Acquired
August 14, 2013
Publication Date
July 1, 1990
Publication Information
Publication: Astronomy and Astrophysics
Volume: 233
Issue: 1, Ju
ISSN: 0004-6361
Subject Category
Astronomy
Accession Number
90A52453
Distribution Limits
Public
Copyright
Other

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