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A squint dual-antenna interferometric SAR (AT-InSAR) ocean current measurement method based on the traditional cross-track InSAR is studied in this paper. In the imaging geometry of cross-track InSAR, we can get an along-track baseline component in the presence of squint, which can be used for ocean current measurement. This additional working mode can extend the application efficiency of DEM acquisition InSAR satellites when flying over the ocean. The imaging geometry of dual-antenna squint interferometric SAR is established, and ocean current velocity measurement principle is given. Mainly, the ocean current velocity measurement performance of this novel working mode is analyzed.

Based on dual frequencies-dual apertures spaceborne SAR (synthetic aperture radar), a new SAR operation mode with four receiving channels is presented in this paper. High resolution imaging and moving target indication (MTI) are studied with this new mode. The coherent accumulation (CA) method, which combines dual channels data, is used to enhance the range resolution. With the data from all channels, the two aperture interferometric processing is executed to implement clutter cancellation. A pair of the clutter suppressed data are employed to implement double carrier frequency conjugated processing (DCFCP), then MTI processing is completed, followed by moving target imaging. The simulation results show the validity of the signal processing method and the feasibility of this new SAR mode.