Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985stoc.iafcz....h&link_type=abstract
IAF, International Astronautical Congress, 36th, Stockholm, Sweden, Oct. 7-12, 1985. 12 p.
Astronomy and Astrophysics
Astronomy
Ampte (Satellites), Infrared Astronomy Satellite, Satellite Tracking, Tracking Stations, Cassegrain Antennas, Computer Programs, Directional Antennas, Hardware, Monopulse Antennas, United Kingdom
Scientific paper
The U.K. Science and Engineering Research Council operates a spacecraft Operations Control Centre at its Rutherford Appleton Laboratory at Chilton in Oxfordshire. This paper describes tracking aspects of the Control Centre during operations of the IRAS and AMPTE missions. Tracking is carried out using a 12 meter antenna with electric drive and S-band monopulse feed. A static pointing error of less than 3 arcminutes is achieved. The antenna is controlled by software on a minicomputer which has access to error and AGC signals from the receivers as well as encoder and status outputs from the antenna. The software is included in the control servo loop, and outputs velocity requests to the motor drive system. Descriptions are given of the tracking system hardware, position control, tracking modes (program and autotrack), orbit predictions, operator interface, and an analysis of accuracies for the two missions.
Ely R.
Holdaway Richard
McPherson P.
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