Study on the simulation of simultaneous full AT‐POLINSAR

Abstract

With the maturity of the instantaneous full-polarisation measurement, the instantaneous full-polarimetric system is becoming an important development direction of the polarimetric synthetic aperture radar (POLSAR); however, as an important research branch of the synthetic aperture radar (SAR), the along-track interferometry (ATI) technology for the ground moving target indication (GMTI) is still largely confined to be single polarimetric. In order to facilitate the study of GMTI using a full-polarimetric along-track interferometric SAR (AT-POLINSAR), this study first models the transmitting and receiving signals of AT-POLINSAR and points out its realisability in the existing technical condition of POLSAR. Then, the 6D vector interferometric model for the full-polarimetric echoes is established, where the differences of data processing with the single-polarimetric ATI are analysed. Finally, two simulation methods of the AT-POLINSAR images are given for the generation of signal-level and image-level data, where the results have shown that both the data quality of the interferometric system and its detection performance for moving targets can be improved by the introduction of full polarisation.