I have some questions about MAG calibration:
I am using Version 5.0 to do MAG calibration. We installed the compass module on our system and our system will be installed on top od vehicle. Before we install the system on top of vehicle, we can calibrate it by 3-axis movement and get 10 point resolved and 5% error fit. It works fine.
After the system is installed on top of vehicle, we can only move elevation(pitch) in 90 degrees, and Azimuth(YAW) in 360 degrees.
1) We move elevation up to certain angle and make the compass module leveled, then we read heading.
2) Can I move elevation up to certain angle and move azimuth(YAW) in full range(0~~360 degrees) to do the MAG calibration? a) If so, can I use 4-point, 7-point or 10-point and error fit rate to decide if it is OK or not? b) How long do I need to move in YAW?
3) If I know NORTH, EAST, SOUTH, and WEST when I do MAG calibration, is there a simple way to calibrate MAG?