Abstract
As part of the preparatory work for the RADARSAT-2 moving object detection experiment (MODEX special operating mode), an airborne experiment was conducted at Canadian Forces Base Petawawa in July 1999 to study synthetic aperture radar (SAR) along-track interferometry (ATI) and SAR displaced phase centre antenna (DPCA) as candidate measurement techniques. The CV 580 SAR system operated by Environment Canada was configured as a two-aperture temporal interferometer, and data were collected over an experiment site that contained coordinated, global positioning system (GPS) monitored, moving targets. A robust ATI phase probability density function was identified and used in conjunction with a moving-target matched filter to extract and measure target motion. Corner reflector and vehicle velocities were measured for target speeds between 9 and 100 km/h to within 5% accuracy. SAR ATI and SAR DPCA performed equally well over this range of velocities, but ATI appears to be the more robust processing algorithm.
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