Patent ID: 11892295
Assignee: NEXTNAV, LLC
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 11:
12. A method, comprising:
determining a first estimated altitude of a mobile device without using any measurement from a pressure sensor of the mobile device;
generating a second estimated altitude of the mobile device using a measurement from the pressure sensor;
estimating a pressure sensor error of the pressure sensor using the first estimated altitude and the second estimated altitude; and
using the pressure sensor error to determine a calibration value for adjusting one or more measurements from the pressure sensor, comprising:
retrieving one or more previously estimated sensor errors of the pressure sensor from storage;
computing an average sensor error by averaging the estimated sensor error and the one or more previously estimated sensor errors; and
using the average sensor error as the calibration value;

wherein the pressure sensor error is estimated by:
determining a difference in distance between the first estimated altitude and the second estimated altitude;
determining an estimated difference in pressure between the first estimated altitude and the second estimated altitude based on the difference in distance; and
setting the pressure sensor error to the estimated difference in pressure.