Onboard clock correction by means of drift prediction

Details Onboard clock correction by means of drift prediction Onboard clock correction by means of drift prediction

1982-06-11

1986-07-22

Safourek, Benedict V.

Pulse or digital communications

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370104, 364723, H04B 7185

Patent

active

046023755

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.

REFERENCES:
patent: 3654395 (1972-04-01), Schmidt
patent: 3781706 (1973-12-01), Osborne et al.
patent: 3992580 (1976-11-01), Bittel et al.
patent: 4048563 (1977-09-01), Osborne
patent: 4144414 (1979-03-01), Nicholas

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