Orbit determination for the Voyager II Uranus encounter

Details Orbit determination for the Voyager II Uranus encounter Orbit determination for the Voyager II Uranus encounter

Aug 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986asdy.conf..178t&link_type=abstract

IN: Astrodynamics Conference, Williamsburg, VA, August 18-20, 1986, Technical Papers (A86-47901 23-13). New York, American Insti

Astronomy and Astrophysics

Astronomy

Flyby Missions, Interplanetary Trajectories, Orbit Calculation, Uranus (Planet), Voyager 2 Spacecraft, Cruising Flight, Interplanetary Navigation, Spacecraft Maneuvers, Very Long Base Interferometry

Scientific paper

The Voyager II flyby of Uranus in January 1986 was the most distant planetary encounter ever attempted, and presented unique challenges to the process of orbit determination. Long light-times and spacecraft receiver difficulties hampered the collection of two-way radiometric data and helped bring about the maturation of a Very Long Baseline Interferometry navigational data type during the long cruise from Saturn. Planet and satellite ephemeris uncertainties necessitated the use of the onboard spacecraft optical system for Uranus-relative navigation. During the close approach phase, these optical data were combined with radiometric data to drive the Uranus system-relative uncertainties down to the level of a few tens of kilometers. This paper contains qualitative and quantitative results and conclusions based on orbit determination experience during Uranus cruise and encounter. Topics include an overview of the navigation-related mission events and requirements, and a review of the salient orbit determination results.

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