Hierarchy classification:

1. top of the aat hierarchies
2. Activities Facet
3. Processes and Techniques (hierarchy name)
4. [processes and techniques by specific type]
5. [exploring and investigating techniques]
6. radar

Anotations

Scope note:

A radar system that uses the motion of the vehicle (such as a spacecraft) carrying it to simulate a system having a much larger antenna area and that is used to obtain high-resolution images of a surface (as of a planet). It requires that the radar be moving in a straight line, either on an airplane or orbiting in space.