The DIRSIG model has baseline support for sensor modeling to help complement more exotic instrument models that are employed by imaging instrument engineers. The important aspect of this end-to-end modeling process that is critical for the DIRSIG model to incorporate during the data generation phase is the geometric aspects of the sensor focal plane and scanning mechanism (if there is one). If the geometric projection of the virtual instrument focal plane into the scene is not performed, then the correct geometric distortions of these instruments will not be captured. Therefore, the DIRSIG model can simulate basic 2D framing array, 1D pushbroom and line-scanner instruments and incorporate the appropriate geometric distortions into the sensor-reaching radiance fields.