Onboard clock correction by means of drift prediction
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United States of America Patent
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Jul 22, 1986
Grant Date -
N/A
app pub date -
Jun 11, 1982
filing date -
Jun 11, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
In an on-board satellite clock correction system of the type wherein phase errors between the satellite clock and a ground-based clock are determined and a clock correction value sent to the satellite, the clock correction value is determined by curve-fitting the determined phase errors in accordance with a polynomial function, updating the polynomial function coefficients so as to minimize discrepancy between the determined phase errors and those according to the polynomial function, predicting a clock drift in accordance with the polynomial function and calculating an error correction value in accordance with the predicted clock drift.
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