Improvements in navigation resulting from the use of dual spacecraft radiometric data

Details Improvements in navigation resulting from the use of dual spacecraft radiometric data Improvements in navigation resulting from the use of dual spacecraft radiometric data

Aug 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976aaas.confq....c&link_type=abstract

American Institute of Aeronautics and Astronautics and American Astronautical Society, Astrodynamics Conference, San Diego, Cali

Astronomy and Astrophysics

Astronomy

Interplanetary Trajectories, Polystation Doppler Tracking System, Radiometers, Satellite-To-Satellite Tracking, Space Navigation, Spacecraft Tracking, Computerized Simulation, Data Processing, Mariner Jupiter-Saturn Flyby, Spacecraft Guidance, Tracking Radar, Tracking Stations, Trajectory Analysis, Viking Orbiter Spacecraft

Scientific paper

If two spacecraft lying along similar geocentric lines-of-sight are simultaneously tracked by two nearby ground stations (dual spacecraft two-station tracking), navigational capabilities may be substantially improved. A thorough accuracy analysis study of dual spacecraft tracking using simulated tracking data based on the trajectories of Viking and Mariner Jupiter-Saturn '77(MJS '77) missions has been carried out. Results of the study reveal the following advantages: (1) cancellation of platform parameter and transmission media modelling errors in short arc solutions, (2) accurate encounter guidance for the trailing spacecraft, (3) reduction of total tracking time requirements, and (4) rapid determination of the orbit following a maneuver on either spacecraft. It is shown that dual spacecraft data types can improve navigational capabilities by a factor of 5 to 10, under the conditions of small angular separation (not exceeding 3 degrees) of the two spacecraft and well determined trajectory of the reference spacecraft. The research to carry out and the data to obtain before the new technique can be used in interplanetary navigation are pointed out.

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