[USER=1927]@Joe_Scot[/USER]: What I call "True Air Speed" is simply "speed" in Parrot's data. But this speed contains elements from all 3 dimensions. If you go vertical you will also have speed there though the ground speed is zero.
Speed (or true air speed) is computed from all 3 components (axis) vx, vy and vz:
tas=squareroot of (vx² + vy² + vz²)
vz is the vertical speed
Groundspeed would be squareroot of (vx² + vy²)
br HE
