US 11,733,037 B2
Systems and methods for providing a barometric altitude monitor
Richard Darrell Ridenour, Peoria, AZ (US); and Charles Castel Manberg, Phoenix, AZ (US)
Assigned to Aviation Communication & Surveillance Systems, LLL, Phoenix, AZ (US)
Filed by AVIATION COMMUNICATION & SURVEILLANCE SYSTEMS, LLC, Phoenix, AZ (US)
Filed on Oct. 2, 2019, as Appl. No. 16/591,495.
Claims priority of provisional application 62/740,278, filed on Oct. 2, 2018.
Prior Publication US 2020/0103228 A1, Apr. 2, 2020
Int. Cl. G01C 5/06 (2006.01); B64D 45/04 (2006.01); G01C 5/00 (2006.01); G01S 1/18 (2006.01); G01S 19/20 (2010.01); G01W 1/02 (2006.01); G08G 5/00 (2006.01)
CPC G01C 5/06 (2013.01) [B64D 45/04 (2013.01); G01C 5/005 (2013.01); G01S 1/18 (2013.01); G01S 19/20 (2013.01); G01W 1/02 (2013.01); G08G 5/0008 (2013.01); G08G 5/0021 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method comprising:
determining that a barometric altimeter in an ownship aircraft is configured in a mode other than standard (STD) mode;
comparing a corrected altitude measurement from the barometric altimeter to a second source of altitude information, the second source of altitude information comprising one of an average and a weighted average of:
a GPS-determined altitude of the ownship aircraft; and
a sum of a radio altitude of the ownship aircraft and a terrain elevation proximate to the ownship aircraft; and
generating an alert in response to determining that the corrected altitude measurement deviates from the second source of altitude information by more than the variable altitude error threshold.