||To get two images from different vantage points, a main antenna was installed in Space Shuttle Endeavour's cargo bay. The main antenna both transmitted and received radar signals.
Once the shuttle was in space, a mast was deployed from a canister that was attached to the main antenna truss. The mast extended out 60 meters (200 feet).
At the end of the mast, an outboard antenna acted as the second vantage point and received radar signals.