deleted - unproductive thread
The typical GPS precision in the z axis is 3 times worse than the precision in the XY axis. The baro altitude also can drift a lot. My guess is that you will need to carry a 10m long rope to be on the safe side.
deleted - unproductive thread
The typical GPS precision in the z axis is 3 times worse than the precision in the XY axis. The baro altitude also can drift a lot. My guess is that you will need to carry a 10m long rope to be on the safe side.