Patent ID: 11914053
Assignee: HONEYWELL INTERNATIONAL INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 16:
17. A method of enhancing an accuracy of a vehicle location determining system, the method comprising:
generating a profiled terrain with a digital active phased array that includes altitude information;
monitoring altitude solutions in the profiled terrain for terrain profile variations;
comparing the profiled terrain with the terrain altitude information in the terrain database when the profile variations in the profiled terrain provides enough altitude information to distinguish a current vehicle location when matching the profiled terrain with terrain altitude information in the terrain database;
determining a profiled location solution when a match is found between the profiled terrain and the terrain altitude information in the terrain database;
comparing the profiled location solution with at least a sensor location solution from a global navigation satellite system (GNSS) receiver;
determining if location errors are present in the sensor location solution from the GNSS receiver based on the comparison of the profiled location solution with the sensor location solution from the GNSS receiver;
broadcasting determined location errors; and
generating alternative waypoints for vehicle travel when altitude information in the profiled terrain does not provide enough profile variations to distinguish a current vehicle location when matching the profiled terrain with terrain altitude information in a terrain database.