I’ll report this to the devs, hopefully they can confirm. visser (visser) October 19, 2014, 5:46pm 3. Started having this issue today, updated to AC3.2-RC12. Bad Compass Health notice on HUD. I’m using a APM 1.6 clone board with the internal compass trace cut and a NEO-6M GPS/compass, had calibrated compass without issue on AC3.1.5.
For example, you are in ALTHOLD in Copter, hovering at 30m and out of the RangeFinder’s range. The Target ALT has been set to the current Estimated ALT and will try to hold it. Now you descend using the throttle stick to 10m and are now within the RF’s range. When you release the stick, the Target ALT will be set to the RF reported altitude. Large or heavy vehicles are impractical to rotate on all axis. This feature allows a fairly accurate calibration if GPS lock is active on the autopilot and the vehicles actual heading is known, either using a landmark reference on the Mission Planner map, or using another compass (eg cell phone) and entering the vehicles heading.