Ball Aerospace & Technologies Corp. has an extensive history in modeling and simulation. Ball Aerospace has developed integrated system models for the Very Large Telescope (VLT) for European Southern Observatory (ESO), for the James Webb Space Telescope (JWST), for several NPOESS instruments including the Visible/Infrared/Radiometer Suite (VIIRS), the Conical Scanning Microwave Imager/Sounder (CMIS), and the Ozone Mapping Profiling Suite (OMPS), and many others. As a result, Ball Aerospace has developed a proprietary modeling and simulation tool, TRADES, that is used to analyze space-based systems. TRADES (Toolkit for Remote-Sensing Analysis, Design, Evaluation and Simulation) is a set of software tools in Matlab, designed and developed for simulating, analyzing, evaluating, and conducting design trade studies of remote sensing imagers. It supports simulations and analysis in any spectral regime, most scene sampling designs, and many sensor types. TRADES will provide a physically accurate simulation of a space-based system. This allows for trade studies to analyze the performance of different configurations, definition of subsystem specifications and error budgets for system performance, sensitivity analysis, and the optimization of instrument design to viewing. Explanations of TRADES’ major components will be presented along with examples of its use on several programs.