Method of enhancing receiver autonomous GPS navigation integrity monitoring and GPS receiver implementing the same
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United States of America Patent
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Mar 20, 2001
Grant Date -
N/A
app pub date -
Feb 26, 1999
filing date -
Feb 26, 1999
priority date (Note) -
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Abstract
A global positioning system (GPS) receiver or navigation apparatus for use on an aircraft is disclosed. The receiver implements improved methods of performing both navigation and fault detection and exclusion (FDE) functions. The GPS receiver includes an antenna adapted to receive GPS satellite signals from each of a multiple GPS satellites. Navigation solution determining circuitry coupled to the antenna receives the GPS satellite signals and performs navigation and FDE functions. The navigation solution determining circuitry is adapted to determine both a horizontal position of a least squares navigation solution for the receiver and a horizontal position of a first navigation solution for the receiver as functions of the received GPS satellite signals. The horizontal position of the first navigation solution for the receiver is offset from the horizontal position of the least squares navigation solution for the receiver. The first navigation solution can be either of a maximal accuracy or a maximal integrity navigation solution.
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