The Ocean Current Measurement Signal Processing Method Based on Squinted Dual-antenna Interferometric SAR

The signal processing method of ocean current measurement based on squinted dual-antenna interferometric SAR (InSAR) is studied in this paper. There is an along-track baseline component in the imaging geometry of squinted cross-track InSAR, which can be used for ocean current measurement and this mode can extend the application efficiency of DEM acquisition InSAR. In this context, the principle of ocean current velocity measurement method based on squinted cross-track InSAR is introduced. The signal processing method and procedure are studied. BP (Back Projection) algorithm is adopted in SAR imaging, and the flat ground interferometric phase expression is derived. The effectiveness of the proposed method is verified by echo simulation and data processing.