There are three codes available on this site. UCLCHEM is a gas-grain time-dependent chemical code. 3D-PDR is the first fully 3D code for PDR regions and a 1D version - UCL_PDR - will also be available on this site. Links for each code are above and the individual pages for each code have full descriptions and links to the code repositories and manuals.
Support or Contact
Any site or UCLCHEM related questions can be directed to jrh at star.ucl.ac.uk