US 11,674,798 B2
Systems and methods for determining calibration values for atmospheric sensors that provide measured pressures used for estimating altitudes of mobile devices
Michael Dormody, San Jose, CA (US); Guiyuan Han, San Jose, CA (US); and Badrinath Nagarajan, South San Francisco, CA (US)
Assigned to NextNav, LLC, Sunnyvale, CA (US)
Filed by NextNav, LLC, Sunnyvale, CA (US)
Filed on Feb. 12, 2021, as Appl. No. 17/248,913.
Application 17/248,913 is a continuation of application No. 16/380,107, filed on Apr. 10, 2019, granted, now 10,921,121.
Claims priority of provisional application 62/679,937, filed on Jun. 3, 2018.
Prior Publication US 2021/0164779 A1, Jun. 3, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G01C 5/00 (2006.01); G01C 5/06 (2006.01); H04W 4/029 (2018.01); G01L 27/00 (2006.01)
CPC G01C 5/06 (2013.01) [G01L 27/005 (2013.01); H04W 4/029 (2018.02)] 15 Claims
OG exemplary drawing
 
1. A method, comprising:
determining a plurality of uncalibrated reference-level pressure estimates associated with an unstable pressure sensor, each uncalibrated reference-level pressure estimate corresponding to a respective time period of a plurality of time periods;
determining if the plurality of uncalibrated reference-level pressure estimates include an uncalibrated reference-level pressure estimate that should not be used when calibrating the unstable pressure sensor;
identifying the uncalibrated reference-level pressure estimate of the plurality of uncalibrated reference-level pressure estimates that should not be used when calibrating the unstable pressure sensor; and
determining a calibration value for the unstable pressure sensor using the plurality of uncalibrated reference-level pressure estimates except for the identified uncalibrated reference-level pressure estimate that should not be used when calibrating the unstable pressure sensor.