Licenses

pycraf itself is published under GPL v3, an open-source license. The package is based on the Astropy-affiliated package template, which is under BSD 3-clause license.

For some of the functionality provided in pycraf, data files provided by the ITU are necessary. For example, the atmospheric model in the pycraf.atm subpackage implements the algorithm described in ITU-R Recommendation P.676. Annex 1 of this Recommendation makes use of spectroscopic information of the oxygen and water vapour lines given in Tables 1 and 2 of P.676.

ITU kindly gave us permission to include data files into pycraf that are distributed with the Recommendations on the ITU servers. This makes it possible to just use pycraf without the need to manually download necessary data files. However, these data files are not free for commercial use. For details, please see the LICENSE.ITU file.

We are very grateful for the kind support from ITU study groups and ITU’s legal department.