GalSim Roman module diagrams - GalSim-developers/GalSim GitHub Wiki

The following diagram illustrates the various coordinate systems used to describe Roman Space Telescope and the wide-field imager for Cycle 6, which is relevant for GalSim v1.5 and later:

The following diagram was provided by Jeffrey Kruk to illustrate the various coordinate systems used to describe Roman Space Telescope (then WFIRST) and the wide-field imager for Cycle 5, which is relevant for GalSim v1.4: