2 things. What is the compass calibration and what does it do? What is the IMU and what does it do?

There is a solid state compass in the aircraft, which it uses for navigation. But the flight control system needs to be able to differentiate between the earth's magnetic field and any residual magnetic fields from the components used to the contruction of the aircraft, therefore there is a compass calibration procedure to perform that function. It is not a procedure you need to perform very often, just once, if done properly, will suffice.

The IMU is the Intertial Measurement Unit, which senses changes in movement of the aircraft in 6 axis. It contains gyros and accelerometers to measure the minute movements. Again, it needs to be calibrated, but also, like the compass, this calibration only needs to be done once in a while.

Both devices, the compass and the IMU, plus other sensors such as the barometer, the GPS receiver and the VPS (Visual Positioning Sensor) feed data into the flight controller section of the aircraft's control system to aid in flying the aircraft smoothly.

Geebax Posted at 2-16 13:50
There is a solid state compass in the aircraft, which it uses for navigation. But the flight control system needs to be able to differentiate between the earth's magnetic field and any residual magnetic fields from the components used to the contruction of the aircraft, therefore there is a compass calibration procedure to perform that function. It is not a procedure you need to perform very often, just once, if done properly, will suffice.

The IMU is the Intertial Measurement Unit, which senses changes in movement of the aircraft in 6 axis. It contains gyros and accelerometers to measure the minute movements. Again, it needs to be calibrated, but also, like the compass, this calibration only needs to be done once in a while.

Thank you!

Hello and good day Cryptic. Thank you for reaching out and for the inquiry. A good compass calibration is important to ensure a safe, controlled flight for your DJI drones. In addition, calibrating the compass of the said DJI Drone is done to align the drones' flight system with the Earth's magnetic north. With regards to the IMU or "Inertial Measurement Unit". The Inertial Measurement Unit ( IMU ) includes the following components: Gyroscope: Keeps the aircraft steady; Accelerometer: Measures acceleration; Barometer : Measures Alititude; and the Thermometer : Measures temperature. You need to calibrate the IMU of your drone to drift and attitude issues as the flight controller fights to hold the drone in what it thinks is the correct attitude. Thank you.

Geebax Posted at 2-16 13:50
There is a solid state compass in the aircraft, which it uses for navigation. But the flight control system needs to be able to differentiate between the earth's magnetic field and any residual magnetic fields from the components used to the contruction of the aircraft, therefore there is a compass calibration procedure to perform that function. It is not a procedure you need to perform very often, just once, if done properly, will suffice.

The IMU is the Intertial Measurement Unit, which senses changes in movement of the aircraft in 6 axis. It contains gyros and accelerometers to measure the minute movements. Again, it needs to be calibrated, but also, like the compass, this calibration only needs to be done once in a while.

Good info....thanks....