Boots – shoes – and leggings
Patent
1992-05-29
1994-05-31
Black, Thomas G.
Boots, shoes, and leggings
364450, 342357, 342450, B06G 778
Patent
active
053175140
ABSTRACT:
Navigation system errors, which result from a bias or error in a transmitter's data or timing, are detected and isolated. The transmitters may be ground based or they may be in a satellite. The least square error residual is calculated using the information received from the transmitter and the last estimate of the aircraft's position. Using Baye's Rule, the residual is used to calculate the a posteriori conditional probability of each transmitter being in error. The a posteriori conditional probabilities, and an estimate of each transmitter's error or bias are used to estimate the system loss associated with the elimination of a particular transmitter's information from the calculation of the aircraft's position. The faulty transmitter is identified by determining which transmitter's elimination will result in minimal system loss. In some instances, the system loss is minimized by eliminating no transmitters. Once the configuration that produces minimal loss is determined, the aircraft's position is calculated using the information from the transmitters that compose the minimal loss configuration.
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The Effect of Geometry on Integrity Monitoring Performance, A. Brown and M. Sturza; pp. 121-129; Institute of Navigation (ION) Annual Meeting; Jun. 1990.
Autonomous GPS Integrity Monitoring Using the Pseudorange Residual; B. Parkinson and P. Axelrad; pp. 255-274; Navigation, Journal of the ION, vol. 35, No. 2; Summer 1988, USA.
Bancroft Stephen
Chen Susan S.
Allied-Signal Inc.
Black Thomas G.
Louis-Jacques Jacques H.
Massung Howard G.
Paschburg Donald B.
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