Doppler navigation method for determining the distance travelled

Details Doppler navigation method for determining the distance travelled Doppler navigation method for determining the distance travelled

1976-05-19

1977-12-27

Farley, Richard A.

Communications: electrical

Selective

Monitoring in addition to control

G01S 966

Patent

active

040657442

ABSTRACT:
Method and apparatus for determining the distance travelled by a vehicle with respect to a reference surface from the frequency shift between the frequency of signals transmitted from the vehicle and the frequency of echo-signals reflected on said surface in which the transmitted signals consist of a series of pulses of variable recurrence period whose duration is shorter than the propagation time interval of said signals from the transmission point to the reception point of the echo-signal and in which the frequency of the signals constituting said pulses is variable during the period of each pulse.

REFERENCES:
patent: 3617995 (1971-11-01), Goulet
patent: 3742437 (1973-06-01), Thiele
patent: 3745520 (1973-07-01), Barret et al.
patent: 3863198 (1975-01-01), Lerner

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