Patent ID: 9354320
Filing Date: 2016-05-31
CPC Classification: G01S

Claim Text:
1. A method for improving accuracy of calculating a position of a receiver device, the method comprising: acquiring, by a receiver device, satellite orbit data of a first satellite; receiving, by the receiver device, a satellite signal and decoding the satellite signal to obtain decoded data assumed to be satellite orbit data by assuming the satellite signal originated from the first satellite; determining the adequacy of acquisition of the satellite signal by determining whether the received satellite signal originated from a second satellite instead of the first satellite using the decoded data assumed to be satellite orbit data and the acquired satellite orbit data of the first satellite that has been acquired, wherein the determining of the adequacy includes determining the adequacy of acquisition of the satellite signal based on a difference between a value assumed to be a satellite orbit parameter that is stored in the decoded data and a value of a satellite orbit parameter that is stored in the acquired satellite orbit data; calculating a position of the receiver device based on the determination of the adequacy of acquisition of the satellite signal; and outputting the calculated position of the receiver device.