Code to compare approximated PolSpice like Cl determination with full case
Overleaf note here https://www.overleaf.com/9569494rjqprmydqzxb#/34739281/
Download wigner.mat from here https://drive.google.com/file/d/0B-HWfdNbgzSGaUtzLWtLMHA4aE0/view?usp=sharing