The drift rate on internal gyros has been reduced since the first generation Pixhawk, and the extended Kalman filter has been improved. How has this effected the ability of a plane to follow routes? How often does it need GPS in order to keep flying in the general direction? If a plane thinks it has passed through several waypoints, and then GPS kicks in, does it just null out the systematic error and then proceed to the next waypoint? I am designing a long range flight with companion computer to turn off GPS at various intervals long the flight route so as to better understand these issues. If anyone has already done this, please post the results. If not, please post your predictions.

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –


  • Hi Jesse .. I am forwarding the GNSS data to a companion computer and calculating the difference between actual and perceived position along the way .. As I think you are suggesting, the performance of the EKF without GNSS depends on the quality of tuning of magnetic and airspeed sensors, and PID tuning of the FC.
  • Hi Ronald,
    For your long-range flight, You should consider starting with very brief GPS outages and gradually increasing the duration as you gain confidence in the system's performance.
    Wordle Unlimited
    Wordle Unlimited - Play Wordle Game in unlimited mode: no daily limits, play as many times as you want. Track your stats. Challenge your friends!
This reply was deleted.


Santiago Perez liked Santiago Perez's profile
1 hour ago