Hi, I'm wondering if there's a way to obtain AoA and sideslip angle information from GPS speed data? There is vertical speed and 3d speed so this would probably be able to give me an estimate of the angle of attack, but for sideslip, I would have to have the y-component of the speed. Is there a way to get this from GPS or the IMU unit?

I have also tried it for one whole day but am at a loss of how to get the information to be passed from ArduIMU V2+ to ArduPilot so that I can use XBee to transmit it wirelessly to my GCS. Any clues from any good samaritans out there?

Otherwise, I think I am left with integrating acceleration information from the IMU which will probably be susceptible to a lot of errors, and also since it depends on the 'initial conditions' the errors will accumulate continuously.. :( Any ideas on whether this is a feasible option at all?