All the drones that display or monitor their altitude are using an internal barometric sensor. They keep a record of the barometric pressure at take-off to mark their zero point altitude and, based on the change in the pressure, they compute the altitude. No maps or GPS or 3g are needed to accomplish the task.
If you use follow me function and your smartphone also has a barometric sensor, the drone can follow your change in altitude.
During my last follow me flight while driving, my car climbed around 100 meters and the drone kept a constant 40 meters altitude above my car during the whole track, using the data from both barometric sensors.
Στάλθηκε από το MI 5s Plus μου χρησιμοποιώντας Tapatalk
