| 摘要 |
PROBLEM TO BE SOLVED: To calculate a correction value to a navigation solution based on differential GPS data. SOLUTION: In a processor 100 for a navigation system, a GPS distance measuring system 116 receives GPS astronomical ephemeris from at least three GPS satellites, and a DGPS data receiver 130 receives the differential GPS data. At least one Kalman filter 126 operating singly or by combination, based on the GPS astronomical ephemeris received from the GPS distance measuring system, calculates the navigation solution including an average error radius, and calculates corrective navigation solution based on the differential GPS data. A mode logic 124 determines which is to be selected of the navigation solution based on the GPS astronomical ephemeris and the corrected navigation solution. The corrected navigation solution is compared with a zone of an average error range. When it is not within the zone, the corrected navigation solution is not selected, and the navigation solution before the correction is selected. COPYRIGHT: (C)2010,JPO&INPIT |
