A sub-look alignment method for SAR Altimeter

The synthetic aperture Altimeter (SARA) introduces synthetic aperture processing into the conventional radar altimeter (CRA) in the along-track dimension, so both the spatial resolution and precision of SARA are improved. The sub-looks alignment is a key technique in the SARA data processing. In this paper, a method for sub-looks alignment is proposed to correct the varieties of the satellite orbit height and the reference height, and a simulation is given to demonstrate the effectiveness of the method.