Purpose: To understand in what cases the barometer should be turned ON and what cases it should be OFF.

Last Updated: June 2020

Case 1: In completely GPS-Denied environment, the pressure sensor should be set to primary altitude sensor as shown below.

Case 2: In general, if there is frequent GPS availability, the pressure sensor should be used as a secondary altitude sensor.

Case 3: If the pressure of environment does not reflect altitude of the carrier object (i.e. the INS is inside a submarine underwater), then the pressure sensor should be disabled.