After a great summer I would like to share with you what I worked on. 😊 But before that I would like to thank everyone who made that possible. Thank you Shane that you was my mentor this summer and guided me through every problem. I definitely learnt a lot and it was fun. 😃 Thanks for the SunPy community taking me in, and for their every help and I also want to thank ESA and Maxime Perrotin who organized this great program! And now, we can check out the results! 😉 You can find the documentation in the project wiki and the theoretical background in my previous posts. Now I want to concentrate on the actual usage of the library in case of an actual problem from A-Z. Lets say that we have a fits file with several RHESSI visibilities and we would like to process it. First we would like to get the xrayvision module (I assuming that SunPy is already installed). To get the module we have to check it out from GitHub: git clone https://github.com/sunpy/xrayvision.git After t