CGISim

The roman_preflight_proper package is the CGI diffraction model, provided as IDL, Matlab, and Python versions. It incorporates each optical surface and coronagraphic mask in CGI. Each surface has realistic aberrations (either measured or synthetic, depending on what's available), and polarization-induced wavefront error is also included. It uses the PROPER optical propagation library (http://proper-library.sourceforge.net). It includes a manual and example routines. This is the model used at JPL to create CGI observation scenario time series.

CGISim is a Python wrapper around the diffraction model to create dark hole images. It includes system transmission curves and will estimate fluxes. The user specifies the bandpass and spectral type, and the program will generate a broadband dark hole. It also uses the EMCCD simulator of Nemati & Miller (UAH) to add detector noise, if desired. It has a manual and example programs.