Patent ID: 11913809
Assignee: NEXTNAV, LLC
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method comprising:
determining that an estimated position of a mobile device resides outside a coverage area of a network of reference pressure sensors;
for each reference pressure sensor of the network of reference pressure sensors, determining a reference-level pressure for a reference-level altitude using a measurement of pressure from that reference pressure sensor and the altitude of that reference pressure sensor;
using a first set of reference-level pressures that were not determined using the network of reference pressure sensors to determine a pressure pattern for a region that includes the estimated position, at least a portion of the coverage area of the network of reference pressure sensors, and an area not included in the coverage area of the network of reference pressure sensors;
determining a reference-level pressure value for the estimated position of the mobile device using the reference-level pressures determined for the reference pressure sensors of the network of reference pressure sensors by extending the coverage area of the network of reference pressure sensors based on the reference-level pressures determined for the reference pressure sensors of the network and the pressure pattern determined for the region; and
calibrating a pressure sensor of the mobile device using the determined reference-level pressure value for the estimated position of the mobile device.