Patent ID: 11899117
Assignee: NEC SOLUTION INNOVATORS, LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A moving body positioning system comprising:
a GNSS receiver that is included in a moving body and that receives a GNSS signal transmitted from each of one or more satellites and acquires observation data corresponding to each of the satellites;
an external data acquisition unit that acquires external data that is predetermined data other than the observation data;
a multipath detection unit that detects multipath with respect to an observation data group that is a set of pieces of observation data used for positioning calculation to identify a position of the moving body and that is a set of pieces of observation data respectively acquired from the GNSS signals of the one or more satellites; and
a positioning calculation unit that performs the positioning calculation after selection of a satellite to be used and a satellite to be excluded on the basis of a result of the multipath detection, wherein
the multipath detection unit detects the multipath by determining whether the observation data is the multipath on the basis of a blocked range with respect to the GNSS signals in the moving body or an observation status of the GNSS signals in a different station that is a receiver station other than the moving body, the blocked range or the observation status being acquired from an analysis of the external data, and
wherein
the multipath detection unit includes
an invalidity determination condition assignment unit that assigns, to at least observation data included in the observation data group and determined to be the multipath, a predetermined index to be a determination condition for invalidity of the observation data.