Interferometric radar imaging using the AN/APG-76 radar

This paper describes recent performance-enhancing modifications made to the AN/APG-76 radar. An interferometric radar equipped with a four-channel receiver and a seven-channel interferometric antenna, the AN/APG-76 has been used to demonstrate novel interferometric imaging concepts. Originally built as a tactical radar with air-to- air modes, SAR, and three-channel DPCA-like MTI modes, the modified radar's capabilities include: real-time autofocused imaging at 3- and 1-foot resolutions, elevation interferometric SAR (both single and repeat pass), polarimetric imaging, precision tracking by means of a tightly-coupled GPS-aided INS system, and moving target imaging using the inherent clutter-cancellation capabilities of the radar. The re-programmability of the on-board processor allows new real-time modes to be implemented, and high-speed data recording allows off-line analysis of data.

[1]  D. N. Held,et al.  Norden Systems' 2-dimensional Interferometric Synthetic Aperture Radar Flying Testbed , 1992, [Proceedings] IGARSS '92 International Geoscience and Remote Sensing Symposium.

[2]  D. Collier,et al.  RF propagation from a flatplate array antenna with polarizing lenses , 1995, Proceedings International Radar Conference.

[3]  Edward F. Stockburger,et al.  Autofocusing of ground moving target imagery , 1995, Defense, Security, and Sensing.

[4]  R. Guarino,et al.  Integrated GPS/lNS/SAR/GMTI Radar Precision Targeting Flight Test Results , 1995 .

[5]  James D. O'Brien.  Atmospheric effects on repeat-pass SAR interferometry , 1995, Defense, Security, and Sensing.

[6]  Paul M. Ibsen,et al.  Wide-area terrain surveying with interferometric SAR , 1995 .