Patent ID: 11927680
Assignee: POLARIS WIRELESS, INC.
Field: Measurement (Instruments)
Classification: CPC G  H  Y | IPC G  H

Claim 11:
12. The method of claim 8, further comprising:
receiving, by the data processing system, a second estimate of a second elevation made by the wireless terminal, wherein the second estimate of the second elevation has a third uncertainty;
receiving, by the data processing system, a second measurement of barometric pressure made by the wireless terminal, wherein the second measurement of barometric pressure has a fourth uncertainty; and
generating, by the data processing system, a second estimate of bias of barometric pressure measured by the wireless terminal based on a difference between (i) the second measurement of barometric pressure made by the wireless terminal and (ii) a second reference pressure value that corresponds to the second estimate of the second elevation made by the wireless terminal;
wherein the previous state of the Kalman filter is based on (i) the second estimate of bias of barometric pressure, (ii) the third uncertainty, and (iii) the fourth uncertainty.