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

Claim 25:
26. The method of claim 22, wherein if the first maximum estimated reference-level pressure and the first minimum estimated reference-level pressure are not within the predefined amount of pressure:
determining if a second isobar from the set of isobars passes through the coverage area of the network; and
if the second isobar from the set of isobars passes through the coverage area of the network:
at each location of a plurality of different locations on the second isobar inside the coverage area of the network, determining an estimated reference-level pressure at that location on the second isobar using second reference-level pressures that are generated based on one or more of the reference-level pressures determined for the reference pressure sensors of the network of reference pressure sensors;
identifying a second maximum estimated reference-level pressure and a second minimum estimated reference-level pressure from the estimated reference-level pressures at the locations on the second isobar;
determining if the second maximum estimated reference-level pressure and the second minimum estimated reference-level pressure are within the predefined amount of pressure; and
if the second maximum estimated reference-level pressure and the second minimum estimated reference-level pressure are within the predefined amount of pressure, determining a second mean reference-level pressure value using the estimated reference-level pressures that are at the plurality of different locations on the second isobar, and using the second mean reference-level pressure value as the reference-level pressure value for the estimated position of the mobile device.