OARIS21 — sensor_orientation_type is missing a rotation angle

The sensor orientation message reports the orientation of the sensor with two angles: azimuth and elevation. But to completely describe orientation, three angles are required. The missing angle is a rotation about the normal from the array. It can becalled a clocking angle. Using azimuth and elevation correspond to Cardan angles, which describe orientation as heading, elevation, and bank. The missing angle in this system is the bank angle. See https://en.wikipedia.org/wiki/Euler_angles