Performance of three-way data types during Voyager's encounter with NeptuneVoyager's flyby of Neptune in August of 1989 was the most distant planetary encounter ever achieved. Round trip light travel time was more than eight hours, exceeding view periods at two of the three tracking station sites. Consequently, the majority of radiometric tracking was accomplished by transmitting the uplink from one station, and receiving the downlink at a different station. This procedure defines three-way data. Dependence on three-way data for orbit determination is one distinguishing element of Voyager's successful encounter with Neptune. This paper addresses the performance of three-way range and Doppler data supporting pre-encounter orbit determination and post-encounter orbit reconstruction. Also, calibrations which reduce systematic errors inherent to three-way data are described and analyzed.
Document ID
19900065915
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Roth, D. C. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Taylor, T. H. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Jacobson, R. A. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Lewis, G. D. (JPL Pasadena, CA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Subject Category
Space Communications, Spacecraft Communications, Command And Tracking