For the rigid model, there is no motion so the rotation matrix is simply the identity matrix
|R = .||(16.2)|
The frame order matrix is
|Daeg(n) = R⊗n,||(16.3)|
where surface normalisation factor is 1.
The 1 degree frame order matrix with tensor rank-2 is the identity matrix
The 2 degree frame order matrix with tensor rank-4 is the identity matrix