The Geometry Module is in charge of simulating the spacecraft orbit and attitude, as well as the generation of the observation geometry of each instrument. The following Blocks have been identified for the Active Microwaves:

• Orbit – generic to all instrument types
• Attitude – generic to all instrument types
• AOCS/Instrument Coupling – generic to all instrument types
• Scene Interaction: performs several processes specific to the Active Microwaves: SAR2GEO, GEO2SAR, Shadowing mask, Range ambiguities

The architecture is shown in the following figure.