Boots – shoes – and leggings
Patent
1992-03-05
1994-06-21
Black, Thomas G.
Boots, shoes, and leggings
364459, 342357, 342358, G01S 502
Patent
active
053233220
ABSTRACT:
An embodiment of the present invention relates to a worldwide network of differential GPS reference stations (NDGPS) that continually track the entire GPS satellite constellation and provide interpolations of reference station corrections tailored for particular user locations between the reference stations Each reference station takes real-time ionospheric measurements with codeless cross-correlating dual-frequency carrier GPS receivers and computes real-time orbit ephemerides independently. An absolute pseudorange correction (PRC) is defined for each satellite as a function of a particular user's location. A map of the function is constructed, with "iso-PRC" contours. The network measures the PRCs at a few points, so-called reference stations and constructs an iso-PRC map for each satellite. Corrections are interpolated for each user's site on a subscription basis. The data bandwidths are kept to a minimum by transmitting information that cannot be obtained directly by the user and by updating information by classes and according to how quickly each class of data goes stale given the realities of the GPS system. Sub-decimeter-level kinematic accuracy over a given area is accomplished by establishing a mini-fiducial network.
REFERENCES:
patent: 4646096 (1987-02-01), Brown
patent: 4751512 (1988-06-01), Longaker
patent: 4797677 (1989-01-01), MacDoran et al.
patent: 5155490 (1992-10-01), Spradley, Jr. et al.
patent: 5202829 (1993-04-01), Geier
patent: 5225842 (1993-07-01), Brown et al.
Alison Brown, "Extended Differential GPS," published by Navigation: Journal of the Institute of Navigation, in vol. 36, No. 3, Fall 1989, pp. 265-285.
Kalafus Rudolph M.
Loomis Peter V. W.
Mueller K. Tysen
Sheynblat Leonid
Black Thomas G.
Schatzel Thomas E.
Trimble Navigation Limited
Zanelli Michael
LandOfFree
Networked differential GPS system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Networked differential GPS system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Networked differential GPS system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2225138