AHRS

Earth's magnetic field, also known as the geomagnetic field, is the magnetic field that extends from the Earth's interior out into space, where it meets the solar wind, a stream of charged particles emanating from the Sun. Its magnitude at the Earth's surface ranges from 25 to 65 microteslas (0.25 to 0.65 gauss). wikipedia



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from __future__ import division

Magnometers

Most magnometers have a selectable range from +/- 1.3 gauss to +/- 8 gauss, let's look at those ranges in mili-gauss and compare to the above spec of 250-650 mili-gauss.



In [6]:

    
2*8/2**12*1000









    Out[6]:





3.90625



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2*1.3/2**12*1000









    Out[7]:





0.634765625



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2**12









    Out[8]:





4096



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