Relating the planetary ephemerides and the radio reference frame

Details Relating the planetary ephemerides and the radio reference frame Relating the planetary ephemerides and the radio reference frame

May 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985tdar.nasa....1n&link_type=abstract

In its The Telecommun. Data Acquisition Rept. p 1-8 (SEE N85-27094 16-32)

Physics

1

Celestial Reference Systems, Inertial Reference Systems, Planet Ephemerides, Accuracy, Jupiter (Planet), Jupiter Satellites, Mars (Planet), Position (Location), Radio Interferometers, Space Probes, Venus (Planet), Very Long Base Interferometry

Scientific paper

The positions of Venus, Mars, and Jupiter were obtained in the VLBI radio reference frame by measuring the position of a satellite (natural or artificial) of each planet relative to an extragalactic source in the radio catalogue. From the results for Mars and Venus it is concluded that the offset in right ascension of the radio frame from the dynamical equinox defined in DE200 is 0.00 sec +/- 0.04 sec. The observations for Jupiter imply a correction to its position from DE200 of -0.18 sec +/- 0.04 sec in right ascension and -0.06 +/- 0.05 sec in declination on 1983 April 29. The right ascension of Jupiter relative to the inner planets has been measured independently using Doppler tracking data near Jupiter encounter from Pioneers 10 and 11 and from Voyagers 1 and 2 by tying the tracking station positions, through previous spacecraft missions, to the DE200 ephemerides of the inner planets. This technique yielded a correction to Jupiter's right ascension of -0.22 +/- 0.05 sec, in good agreement with the results from the direct radio measurements.

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