Topographic mapping using a Ku-band airborne elevation interferometer

An experimental topographic mapping capability is investigated using data obtained with a multiaperture radar collection system. The authors discuss the signal and image processing aspects that have been implemented in order to produce 3D terrain maps which depict elevation angle and signal strength as functions of range and cross-range. The radar antenna contains both elevation and azimuth multiport interferometers. Horizontal and vertical polarizations can be achieved. The data collection system permits real-time mapping, and data recording for subsequent ground processing. Ground data processing is performed with a mainframe computer. Autofocus and evaluation tracking are implemented, multiple looks are overlaid, and the resulting database is image transformed for interpretation. Topographic maps generated from overland flights are presented.< >