在高分辨率SAR成像处理中，去斜率技术得到了广泛的应用，但是对SAR数据进行去斜率处理后会产生系统误差。文中详细介绍了重叠子孔径算法(OSA)的基本原理，并给出了具体的实现方法，该算法在很大程度上降低了SAR去斜率处理后出现的系统误差项的影响。通过计算机仿真，验证了此算法的可行性和有效性。

Deramp technique is widely used in high resolution SAR imaging processing, but deramp-processing of SAR data can result in system errors. In this paper, the principle and implementation method of Overlapped Sub-aperture Algorithm (OSA) is described in detail. Using OSA, the system errors resulting from deramp-processing of SAR data are significantly reduced. Computer simulation indicates that the algorithm is feasible and effective.

TN958