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BurningFrog
586 days ago
GPS already gives you altitude in addition to longitude and latitude, so I don't understand what the air pressure adds.
1 comments
tqi
586 days ago
Vertical error for GPS is about 2X to 3X more than horizontal error[1], so the barometer helps correct that.
[1]
https://www.nstb.tc.faa.gov/reports/2020_Q4_SPS_PAN_v2.0.pdf...
link
[1] https://www.nstb.tc.faa.gov/reports/2020_Q4_SPS_PAN_v2.0.pdf...