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The Scene Interaction Geometry Block projects the pixel array onto the Digital Elevation Model (DEM). It is catered for Earth observing missions only. Atmospheric and calibration scenes are not taken into account in this Block . The inputs to this Block are the line-of-sight (LOS) in Instrument frame, the rotation matrix from Instrument to ECEF frame, calculated in the Instrument Projection algorithm , the Satellite orbit and the DEM. The output of this Block is the observation area in latitude and longitude. This Block additionally computes, based on the Satellite orbit and attitude, the additional scene data needed for scene generation like Solar Zenith Angle (SZA), Observation Zenith Angle (OZA) and the Relative Azimuth Angle (RAA). These angles are inputs to the Scene Generator Module.