Nowadays the side-looking SAR echo data can be obtained easily from the com-mercial channel, while that of other SAR imaging modes Such as squint, spotlight are difficult tobe acquired. This paper presents a new scheme to transform the side-looking returns to squintones, in a direct and an indirect approach respectively. Direct transformation uses the data witha wide azimuth beam angle. The maximum of the required squint angle is limited under several Nowadays the side-looking SAR echo data can be obtained easily from the com-mer channel, while that of other SAR imaging modes such as squint, spotlight are difficult to be acquired. This paper presents a new scheme to transform the side-looking returns to squintones, in a direct and an indirect approach respectively respectively. Direct transformation uses the data witha wide azimuth beam angle. The maximum of the required squint angle is limited under several