From what I understand, it’d be advisable to do a compass calibration if you jumped in the car and drove quite some distance away from home, for example 100km, to do flying/driving/floating/sinking with Ardupilot. I was wondering how “auto” the autodeclination really is…
I have the auto declination option set and there seems to be no issue since I’ve not experienced any directional issues. I’ve looked over the copter docs and everything else I could find on auto declination but I’m left with a couple of questions.
is the auto declination table baked into the firmware, and therefore fixed until the next firmware update? Could be an issue if you’re running 2 year old firmware!
is the table updated dynamically from an external source either during operation, or just during compass calibration? (which leads to the next question)
if updated dynamically, does that mean the ground station used for calibration needs an internet connection, or is it somehow like the GPS almanac and is updated as if by magic?
Back to my scenario - Driving away from home some distance where I dont normally operate, will I be able to leave Ardupilot (arducopter in my case) sit powered up for a few minutes to sort its self out in regards to the compass and declination?
Or do I need to have a groundstation, internet connection and perform a compass calibration.
The alternative is: do nothing, power up and fly as per normal, the auto declination sorts out everything.