====== About IPRT ====== The **International working group on Polarized Radiative Transfer** (IPRT) has been initiated in June 2011. Its objectives include: * compare and improve polarized radiative transfer models * provide benchmark results * develop publically available codes * provide information about free codes * provide input data (scattering matrices, BPDFs) * bring community together (workshops, ...) === News === **Phase III of the Model Intercomparison Project Has Begun** We are excited to announce the launch of Phase III of the model intercomparison project. This phase focuses on polarized radiative transfer modeling in fully one-dimensional geometry. A comprehensive set of test cases has been defined and is available [[intercomparisons:intercomparisons|here]]. We encourage you to contribute your model results! As with previous phases, we will compile and publish benchmark results to support the broader research community.