Rotation angles to quaternion
q = CL_rot_angles2quat(naxes,angles)
Computes the quaternion q that defines the rotation resulting from the combination of successive elementary rotations, each elementary rotation being described by an axis number (1=x-axis, 2=y-axis, 3=z-axis) and an angle.
Axis numbers: 1=x-axis, 2=y-axis or 3=z-axis (1xP or Px1)
Rotation angles around respective axes [rad] (PxN)
quaternion (that defines the rotation) (4xN).
CNES - DCT/SB