Comment by InitialLastName
3 years ago
Not really?
A 10cm change in elevation at sea level results in a 0.0001% change in atmospheric pressure [0]. On the other hand, weather-relevant pressure changes operate on scales of ~0.1% [1]. By my math, a small weather-relevant pressure change would be equivalent of someone changing their elevation by 100 meters.
Additionally, on a modern phone the barometric data can be adjusted against the accelerometer and GPS to mitigate changes in elevation (especially relative to, as you say, a slow-moving measurement).
[0] https://www.mide.com/air-pressure-at-altitude-calculator [1] https://barometricpressure.app/content/understanding-high-lo...
Why say "not really" when you can simply test this yourself with a sensor dumping app. Planes have been using this technology for about a hundred years with accuracy down to the foot.
It isn't the GPS or position of the device you need to correlate, its trustworthy data. Is the device on an elevator, or did the pressure actually drop?