GPS heading

Projects Networking, Protocols, and Devices
1

Hi everyone, sorry for my bad english, it is not my native language.

I can find the current azimuth position from compass module. But there are a few problems with that;

  1. with HMC6352 magnetometer, we can calibrate for only hard-iron, so that i couldnt find a solution soft-iron.
  2. with LSM303DLM magnetometer, I couldnt calibrate for neither hard-iron or soft-iron.
  3. with HMC5883L magnetometer has same problem with HMC6352.
  4. When I decided to calibrate for only hard-iron, i realized that i should calibrate it everyday. Maybe earth magnetic area is different everyday.

Anyway, my question is;

You know that GPS modules(3DR GPS MTK V2.0) are showing a "heading" which looks in course field. " course=measured heading (165.48)" . please see attached image.

Is that compass heading degree or something else? if it is azimuth degree then I can run motors according to encoders.

Best Regards.

gpsheading.JPG

2

Is that compass heading degree

No. It shows actual heading without regard to magnetic north.

3

Thanks for replying,

Is there any way to calculate the heading by using GPS or any other technic? (Kalman filter or Complementary filter is diffucult to understand.)

4

Is there any way to calculate the heading by using GPS or any other technic?

Relative to what? What is your goal?

5

my aim is finding the azimuth degree by filtering compass from magnetic area, iron, metal......