Communications: directive radio wave systems and devices (e.g. – Directive – Position indicating
Patent
1984-08-02
1987-07-14
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Position indicating
342396, 364449, G01S 510
Patent
active
046805907
ABSTRACT:
Three fixed reference stations having known positions comprise Omega receivers. Phase measurements made at all three stations are assembled at a master station, utilizing landlines or radio links and, using the known positions of the stations, a central processing unit calculates not merely the offset of the master station as measured from the true position but also the errors in the azimuths of the propagation directions of the received signals. The position measurement of a vehicle with an Omega receiver is corrected on the basis of the offset and also the errors in the said azimuths. Sufficient accuracy is achieved for finding the position of land based vehicles whose position may be calculated subject to the corrections in the master station on the basis of raw data transmitted to the master station over a link. Alternatively the azimuth corrections may be transmitted to the vehicle over the link. Two fixed stations suffice if they can measure absolute phase.
REFERENCES:
patent: 2838753 (1958-06-01), O'Brian et al.
patent: 2844816 (1958-07-01), O'Brian et al.
patent: 3242494 (1966-03-01), Gicca
patent: 3419865 (1968-12-01), Chisholm
patent: 3715758 (1973-02-01), Sender
patent: 3774211 (1973-11-01), Nard et al.
patent: 3774215 (1973-11-01), Reed
patent: 4232317 (1980-11-01), Freeny, Jr.
patent: 4492963 (1985-01-01), Scarlet et al.
"Automatic Differential Omega Receiver M6"; Sercel, Inc. (Washington, D.C.).
Lowe Eric
Poppe Martin C.
Stratton Andrew
Blum Theodore M.
Gregory Bernarr Earl
O'Connell Robert F.
Terrafix Limited
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