Conflict when several apps use the accelerometers?

Gunnar Aastrand Grimnes gunnar.grimnes at
Mon Jan 26 15:00:40 CET 2009

This page does:

Noise is around 3cm/s^2, i.e:

It can fill in _short_ - 3-5s gaps in GPS coverage, if the orientation
of the phone is known.

Helge Hafting wrote:
> Hendrik Siedelmann wrote:
>> Get higher gps accuracy using accelerometer data (or use it when driving
>> through a tunnel) would be a nice example.
> That'd be interesting. Do anyone know the precision of the 
> accelerometers? Assuming, of course, that one has a car mount so the 
> phone has a known orientation relative to the car. How long tunnels 
> would be feasible? Where I live, there are some 4km tunnels that curve 
> slightly, and a shorter one with a roundabout inside. :-/
> Usually, one also uses the car speedometer for this. I have a box that 
> converts this to serial - perhaps a serial to usb converter could be 
> used to connect the phone.
> Helge Hafting
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