Self calibration of a LORAN-C navigation receiver

Details Self calibration of a LORAN-C navigation receiver Self calibration of a LORAN-C navigation receiver

1979-04-09

1981-05-19

Blum, Theodore M.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

G01S 124

Patent

active

042688302

ABSTRACT:
A method for self calibration of a LORAN-C navigation receiver utilizing a microprocessor is disclosed wherein the time difference of signal arrival of master station pulse trains from a LORAN-C chain selected by group repetition interval (GRI) information input to the receiver becomes a frequency standard to which the output of an oscillator and counter internal to the receiver is compared to determine frequency error. The error is interpolated over each GRI and a correction factor is added or subtracted to each count output of the counter used to make time difference of signal arrival measurements.

REFERENCES:
patent: 3153237 (1964-10-01), Lakatos

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