Reply To: Compass Reading near North Pole
This is a very interesting question I have had similar thoughts about using the sensor at the equator, but thats another story.
To be safe I think you should calibrate your unit in the local magnetic surroundings, and the sensor should operate as specified.
Are you able to perform Calibration on site, or are these being deployed from a test platform, and delivered to the area you mentioned?
However the UM7’s only limitation is the sensor itself, its sensitivity is ±4800 uT at full scale range.
so this gives the sensor about (9600 uT/ 2^14 bits) = apx 585.98 nT resolution.
However the figures you have posted look within these values, so I don’t think this would be an issue.