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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Anders et al. (1963) studied this question.
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