POSITIONING DEVICE, POSITIONING METHOD, AND POSITIONING PROGRAM

摘要

PROBLEM TO BE SOLVED: To perform highly accurate positioning by using a GLONASS (Global Navigation Satellite System).SOLUTION: A positioning signal reception device 21 outputs a carrier wave phase &phgr;k and a pseudo distance Pk for each positioning satellite. A reference positioning signal IF 23 outputs a carrier wave phase &phgr;m and a pseudo distance Pm for each positioning satellite. An environment detection module 5 calculates an error estimation quality index value for the pseudo distance Pk of each positioning satellite on the basis of the pseudo distance Pk of each positioning satellite. A geometric distance estimation value composition module 4 calculates a geometric distance estimation value of each positioning satellite on the basis of the error estimation quality index value of the pseudo distance Pk of each positioning satellite. A single difference ambiguity estimation module 3 calculates single difference ambiguity for each positioning satellite on the basis of the corresponding values of each positioning satellite. A positioning analysis module 2 calculates double difference ambiguity on the basis of the single difference ambiguity of each positioning satellite, and measures a position of the positioning signal reception device 21 on the basis of the double difference ambiguity.