Application of adaptive joint time-frequency processing to ISAR image formation

Two applications of the adaptive joint time-frequency (AJTF) algorithm for ISAR image formation are presented. First, AJTF is utilized for ISAR motion estimation and compensation. Focused images from measured radar data are presented to illustrate the effectiveness of the algorithm when applied to in-flight aircraft data. Second, the AJTF algorithm is extended to detect the presence of chaotic, three-dimensional motions in an articulating target. Preliminary test results on measured data show that the algorithm can correctly detect those imaging intervals where significant three-dimensional motions exist