The International working group on Polarized Radiative Transfer (IPRT) has been initiated in June 2011. Its objectives include:
Phase B (3D test cases) of the model intercomparison has been published:
Emde et al. 2018, JQSRT
The benchmark results can be downloaded here.
Results of phase A of the IPRT intercomparison have been published: Emde et al. 2015, JQSRT