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Comment: fixing what I missed a minute ago


titleAbout WGS84 altitude

The WGS84 altitude does not refer to the common altitude (usually MSL : Mean Sea Level) of a location but take in takes into account others other parameters like the Geoid separation:

Altitude (WGS84) = Height (MSL) + Geoid Separation

 Altitude (MSL) can be found using GoogleEarth or other map tools and Geoid separation can be obtained here

If you only know your altitude without the Geoid separation values, just enter Altitude. This should not be an issue and sufficient for sensor calibration.