LOCATION METHOD, LOCATION PROGRAM, GNSS RECEIVER APPARATUS, AND MOBILE TERMINAL

摘要

This invention is directed to achievement of highly-precise calculations of locations that are independent of whether multipaths are existent. An observed pseudo range ?m(k) is acquired based on a received location signal (S101). An estimated pseudo range ?mp(k) to be used for determination of this time is calculated based on the previous estimation result (S102). A difference value Delta?m(k) to be used for determination is calculated from the observed pseudo range ?m(k) and the estimated pseudo range ?mp(k) (S103). A threshold value sDelta? to be used for determination is calculated from C/No and PDOP of the received signal (S104). If the difference value Delta?m(k) to be used for determination is less than the threshold value sDelta?, then an approximate expression of C/No is used to calculate an error variance spm(k) (S105(No) to S106). If the difference value Delta?m(k) to be used for determination is equal to or greater than the threshold value sDelta?, then an error variance spm(k) is calculated based on the threshold value sDelta? (S105(Yes) to S107).