To read TROPOMI data block files in NetCDF format, users can make use of the netCDF library which is built into most of the common data analysis packages (MATLAB, python, IDL, etc). A large amount of free software as well as commercial or licensed packages is available at the UniData website.
The atmospheric toolbox has been extended to provide support to the Sentinel-5 Precursor users. The toolbox supports extraction, visualisation and analysis of Sentinel-5 Precursor products.
The AUX_CTMANA auxiliary files are produced daily by the TM5-MP chemistry transport model and contains a-priori profile shapes for the NO2, HCHO and SO2 vertical column retrievals. This python tool can be used to extract those profiles. Details on how to use the tool are available in the TM5 Product User Manual.