digital compass modules

Frans Grotepass fmgrotepass at
Wed Jan 23 15:46:39 CET 2008

On Wednesday 23 January 2008, Schmidt András wrote:
> François TOURDE wrote:
> Right! That was an other possible solution I was thinking about. Though
> I think that algorithm should be very carefully implemented (a very
> sensitive regulator filter) not to accumulate the measurment error of
> the accelerometer, and corrigate with the GPS signal when possible. I am
> not even sure it is possible. Precision would get worse when you are
> moving slow and shake the device (the case on foot). The regulator code
> would also consume much energy. Direct measurment of direction seems to
> be much better for me.
> These are only speculations with little information and no experience
> with such devices (accelerometer and magnetic sensor in fact).

GPS combined with INS? I think the accelerometers aren't accurate enough for 
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