Open Source AHRS project: giving away hardware
Pascal Gosselin
pascal at aeroteknic.com
Sun May 11 15:25:37 CEST 2014
Indeed. When you taxi an airplane on the ground in a straight live or drive a car in a straight line, GPS TRACK (adjusted for magnetic declination) = Magnetic Heading.
The other complementary magnetometer calibration techniques involve driving around in a full circle in about 60 to 75 seconds or doing a 360 degree turn and stopping every 30 degrees.
-Pascal
Sent from my iPhone
> On May 11, 2014, at 4:47 AM, "Jake" <jake42 at rommel.stw.uni-erlangen.de> wrote:
>
>> On 05/11/2014 07:08 AM, joerg Reisenweber wrote:
>>> On Sat 10 May 2014 11:57:30 Pascal Gosselin wrote:
>>> calibrate the compass via GPS track by an easy calibration or
>>> self-calibration method
>>
>> GPS doesn't offer any data to calibrate magnetometer from.
>> magnetometer aka compass is about orientation of device, GPS is
>> about position and movement vector. They are 100% unrelated.
>
> In a static situation this is correct, but while moving it is possible
> to get the current heading from GPS.
>
> Jake
>
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