摘要:
PROBLEM TO BE SOLVED: To provide an improved method and an apparatus for securing the flexibility of the positioning of a positioning server. SOLUTION: A plurality of digital processing systems are coupled to a communication network to receive satellite ephemeris data which are transmitted through the communication network. A digital processing system receives pseudorange data from a SPS mobile receiver and calculates the position information of the SPS mobile receiver from the representation of the pseudorange data and from satellite ephemeris data received from the communication network. The digital processing system may also receive pseudorange correction data from the communication network and use these correction data to correct the pseudorange data to provide the representation of the pseudorange data. COPYRIGHT: (C)2010,JPO&INPIT
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