Extracting the Euler angles of a given residue within a peptide

Greetings everyone, I'm trying to determine the NMR order parameters of a protein that i'm working on and in order to do this I need the Euler  rotation angles alpha, beta, gamma of a given residue within the peptide. Unfortunately I can't seem to find a  way to extract this data from my MD simulation (I used NAMD to run my  simulations and CHARMM for the analysis and modelling of my protein). Is  there any known solution for this kind of problem within Discovery Studio (I'm using 3.1)?

Thanks in advance for all those repsonding!