I'm building an autonomous sail boat (ripped out the guts of an RC sail boat and replaced with my own mainboard etc.)
The controller board I have can accommodate both an MPU9150 and an HMC5883. Is there any advantage is using both magnetometers for a tilt-compensated heading? I'm thinking that I could compute the unit vector with soft/hard iron offsets removed for both, and then average the two vectors to get one slightly better one?
Not sure if it would yield a better result though.