【摘要】 作者用 SIR-C/X-SAR的 X波段 SAR的原始数据 ,实现了真实数据 SAR的成像。本文给出了成像实现的完整过程、具体步骤以及各步骤间的关系 ,包括成像算法选择、距离向线性调频脉冲压缩、多普勒中心估计、多普勒频率变化率估计、方位向压缩处理、降低相干斑的多视处理以及改善图像层次的后处理等 ,对各步骤进行了扼要叙述 ,并以框图的形式明确表示了成像几何参数、雷达系统参数、多普勒参数等与各步骤间的关系。此外还给出了部分主要中间结果与参数 ,以及最后的成像结果。更多还原

【Abstract】 The formation of SAR image is success fully fulfilled by using the X-band raw data from SIR-C/X-SAR. First, a flow diagram that ca n clearly illustrate the whole process, detailed steps and relation between thes e steps of SAR imaging is given. It is also helpful in clearly explaining the role of geographic parameters, radar system parameters and Doppler parameters in these steps. Secondly, brief description is given to all detailed steps includi n g imaging algorithm selection, compression in range, estimation of Doppler centr oid and Doppler frequency rate, compression in azimuth, multi-look processing f or reducing speckle and post-processing of image for improving gradation, etc. Finally, some important intermediate results and parameters are given, and fina l imaging results are shown.更多还原