The third Rasulid sultan, al-Malik al-Ashrāf ‘Umar, wrote a major astronomical text called al-Tabṣira fī ‘ilm al-nujūm. The German historian of science Petra Schmidl is editing the Arabic and translating this into English. You can follow her work as it appears online, as well as download several articles she has written about the manuscript by clicking here.
Note: The urls for items in red are available at the website.