Patent ID: 11874384
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 4:
5. A locator comprising:
a processor to execute a program;
a memory to store the program which, when executed by the processor, performs processes of:
obtaining GNSS data from a G\SS receiver, the GNSS data being data received by the GNSS receiver from a GNSS satellite;
obtaining autonomous sensor data that is data output by an autonomous sensor;
calculating an interpolated value for the autonomous sensor data when the autonomous sensor data is obtained after the GNSS data is obtained, the interpolated value corresponding to a time of latest GNSS data;
performing complex positioning using the latest GNSS data and the interpolated value for the autonomous sensor data;
performing first autonomous navigation positioning using the interpolated value for the autonomous sensor data, and performing second autonomous navigation positioning using latest autonomous sensor data;
calculating a modified amount of autonomous navigation positioning, based on a difference between a first complex positioning fix that is a result of the complex positioning and a first autonomous navigation positioning fix that is a result of the first autonomous navigation positioning; and
modifying using the modified amount, a second autonomous navigation positioning fix that is a result of the second autonomous navigation positioning to calculate a second complex positioning fix, and outputting the second complex positioning fix as a measurement result of a current position; and

an accuracy evaluation system configured to:
obtain data on an accurate positioning fix that is a positioning result, from a survey instrument that performs positioning using data received from the GNSS satellite, and
evaluate accuracy of the first complex positioning fix by comparing the first complex positioning fix with the accurate positioning fix identical in time to the first complex positioning fix.