Two-way ranging system

Details Two-way ranging system Two-way ranging system

1985-01-22

1987-06-30

Tubbesing, T. H.

Communications: directive radio wave systems and devices (e.g.,

Testing or calibrating of radar system

By monitoring

342 51, 342125, G01S 1380, G01S 740

Patent

active

046774416

ABSTRACT:
A two-way ranging system in which deviations of transmit times of interrogation signals from a nominal transit time are determined at a transponder. These deviations are dependent upon the propagation conditions for interrogation and reply signals in the medium of propagation. A normally fixed delay is developed in the transponder. This fixed delay occurs between the reception of an interrogation signal and the transmission of a reply signal. This fixed delay is so shortened as to compensate for transit time deviations of the interrogation and reply signals.

REFERENCES:
patent: 3124799 (1964-03-01), Hagedorn et al.
patent: 3237192 (1966-02-01), Stansell, Jr. et al.
patent: 3728728 (1973-04-01), Vogel
patent: 4126859 (1978-11-01), Bohm
Lassiter et al, "NAVSTAR/GPS: Operational Stans", Journal of Navigation, vol. 30, No. 1, Jan./77.
D. R. Prunty, "Automatic Transponder Calibration in PME Ranging Systems", IBM Technical Disclosure Bulletin, vol. 21, #2, Jul. 1978.

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