Boots – shoes – and leggings
Patent
1986-05-01
1989-03-14
Lall, Parshotam S.
Boots, shoes, and leggings
364449, 364444, 342356, 342357, G01S 502
Patent
active
048129917
ABSTRACT:
A method and apparatus for rapidly and accurately determining the position coordinates of a remote, movable receiver relative to a fixed reference receiver. The technique utilizes successive code measurements and carrier phase measurements of both the L.sub.1 and L.sub.2 carrier signals broadcast from four or more orbiting GPS satellites. Code measurements based on a weighted average of the individual L.sub.1 and L.sub.2 code measurements in each satellite/receiver link are adjusted in accordance with the corresponding carrier phase measurement for an L.sub.1 -L.sub.2 carrier difference signal and are further smoothed over time. This yields a rapid determination of the remote receiver's position coordinates, with progressively increasing accuracy. After merely about two to three minutes of processing, a wide laning carrier phase procedure can be implemented to yield a position determination that is accurate to within about one centimeter.
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Yakos et al., "Time Dissemination Using Navstar Global Positioning System (GPS) Phase IIB User Equipment", Proc. 35th Am. Freq. Control Symposium, USAERADCOM, Ft. Monmouth, N.J., May 1981, pp. 537-545.
Lall Parshotam S.
Magnavox Govt. and Industrial Electronics Company
Seeger Richard T.
Trans V. N.
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