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Very-long-baseline-interferometry measurements of planetary orbiters at Mars and VenusThe first attempts to use radio interferometric techniques to measure the positions of planetary orbiters were made in 1980 with the Viking Mars orbiter and again in 1993 using the Pioneer Venus orbiter. The angular accuracy of these early measurements was on the order of 200 nrad. This work describes more recent very-long baseline interferometry (VLBI) measurements made in 1989 of the Soviet Martian orbiter, Phobos 2, and several measurements made since September of 1990 of the Magellan spacecraft orbiting Venus. Both the Phobos and Magellan measurements recorded data with the Mark 3 VLBI systems located at antennas of NASA's Deep Space Network (DSN). The much wider bandwidth of this recording system and the availability of ionospheric calibrations should allow angular accuracy approaching 5 nrad to be achieved with these measurements.
Document ID
19950049808
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kroger, Peter M.
(Jet Propulsion Laab., California Inst. of Tech., Pasadena, CA US, United States)
Folkner, William M.
(Jet Propulsion Laab., California Inst. of Tech., Pasadena, CA US, United States)
Iijima, Byron A.
(Jet Propulsion Laab., California Inst. of Tech., Pasadena, CA US, United States)
Hildebrand, Claude E.
(Jet Propulsion Laab., California Inst. of Tech., Pasadena, CA US, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Publication Information
Publication: In: Spaceflight mechanics, 1993; AAS(AIAA Spaceflight Mechanics Meeting, 3rd, Pasadena, CA, Feb. 22-24, 1993, Parts 1 & 2 . A95-81344
Publisher: American Astronautical Society (Advances in the Astronautical Sciences, Vol. 82, Pts. 1 & 2)
ISSN: 0065-3438
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking
Accession Number
95A81407
Distribution Limits
Public
Copyright
Other

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