I'm working on doing some parameter identification for a small UAV model, but unfortunately due to the size of the aircraft, we are unable to measure alpha and beta directly. What we do have are X/Y/Z position and acceleration, velocity, roll/pitch/yaw angles, and roll/pitch/yaw rates. Is there an easy way to estimate the AoA and sideslip angle from these parameters? In my searches, I'm under the impression that since I don't have any measurement of the wind relative to the inertial frame, then I can't use any of my inertial frame or body frame measurements relative to each other to determine these angles. Is my thinking correct?