Bell System Technical Journal

1963

DOI: 10.1002/j.1538-7305.1963.tb04036.x

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The Precision Tracker

E. F. Higgins²,

et al.

Abstract: The precision tracker, a simultaneous lobing, amplitude‐comparison, passive, continuous‐wave tracker based in principle and design upon a monopulse tracking radar, is employed at the Andover, Maine, and. Pleumeur‐Bodou, France, stations to find the satellite and direct the horn‐reflector antennas when required and, at regular intervals during subsequent passes, to provide the precise tracking data required for prediction of future orbital parameters.

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Phase-Lock Loop Design for Coherent Angle-Error Detection in the Telstar Satellite Tracking System

1963

Bell System Technical Journal

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The function of the angle‐error detector is to provide pointing‐error signals to the ground antenna control system, which allows operation in the autotrack mode once the satellite beacon has been acquired. The limitations on the accuracy of this system imposed by noise, phase jitter and Doppler effects are evaluated, and the optimum design in terms of minimum mean‐square error is developed. Design examples are given for both the horn‐reflector antenna autotrack system and the precision tracker antenna system.

Phase-Lock Loop Design for Coherent Angle-Error Detection in the Telstar Satellite Tracking System

1963

Bell System Technical Journal

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The function of the angle‐error detector is to provide pointing‐error signals to the ground antenna control system, which allows operation in the autotrack mode once the satellite beacon has been acquired. The limitations on the accuracy of this system imposed by noise, phase jitter and Doppler effects are evaluated, and the optimum design in terms of minimum mean‐square error is developed. Design examples are given for both the horn‐reflector antenna autotrack system and the precision tracker antenna system.

The Spacecraft Communications Repeater

¹

,

et al. 1963

Bell System Technical Journal

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Antenna Pointing System: Organization and Performance

et al. 1963

Bell System Technical Journal

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This paper is a description of the antenna pointing system used in the satellite ground station at Andover, Maine. It is an introduction to the following five papers in this issue, which describe and discuss in some detail the various major parts and features of the antenna pointing system. In order that the antenna have sufficient gain for the Telstar experiment, it was necessary that it have a “pencil” beam of about 1/5 degree in diameter. This requires an antenna pointing system of high accuracy. The equipment and methods required to achieve this accuracy are outlined.

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