Patent ID: 11960010
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. A positioning terminal, comprising:
a receiver that receives positioning signals transmitted from a plurality of satellites; and
a processor that determines coordinates of a moving body by performing a positioning calculation based on information included in the positioning signals, wherein the processor:
calculates an elevation angle of each of the plurality of satellites;
measures a received strength of a signal transmitted from each of the plurality of satellites;
compares the received strength with a first threshold for each of the plurality of satellites, the first threshold increasing as the elevation angle becomes lower;
compares the received strength with a switching threshold for the plurality of satellites in descending order of the elevation angle of each of the plurality of satellites;
determines a determination reference satellite for which the received strength is less than the switching threshold;
performs a first comparison that compares the received strength with the first threshold for the determination reference satellite and every satellite of which the elevation angle is lower than the elevation angle of the determination reference satellite;
performs a second comparison that compares the received strength with a second threshold for every satellite of which the elevation angle is higher than the elevation angle of the determination reference satellite;
selects a first satellite for which the received strength is less than the first threshold in the first comparison or less than the second threshold in the second comparison, as an exclusion target; and
performs the positioning calculation based on information transmitted from a second satellite other than the first satellite selected as the exclusion target.