一种干涉SAR复图像数据的快速仿真方法

为了给干涉测高算法提供具有先验知识的干涉数据,进行算法的定量可控误差分析,以完成算法性能的定量评估,针对干涉SAR(合成孔径雷达)数据仿真进行了深入的研究.考虑多种因素,推导出用于干涉SAR仿真的一种仿真模型,能快速完成干涉SAR面目标复图像的仿真;并提出迭代插值算法反推雷达斜距,既很好地去除了干涉SAR仿真中的奇异点效应,又提高了仿真速度.能够为图像配准、相位解缠产生数据源,也可进行基线估计.计算机仿真结果表明,新仿真模型具有快捷、灵活、多功能性,迭代插值算法也具有快速准确性.

Fast simulation of complex image for interferometric SAR

To validate the capability of interferometric algorithm and give useful complex INSAR data for INSAR study, a new method of INSAR (interferometric SAR) simulation was carried out. As the backscattering coefficient and thermal noise and other factors were concerned, a model of simulation of INSAR based on complex image was deduced; also a new method used to determine the slant distance accurately was analyzed and given. With this method, complex image data for interferometric SAR can be generated fast and effectively, and high-quality phase interferograms without break points can be obtained conveniently. This model can produce data for registration and phase unwrapping, and baseline estimate method can also be validated with the data. The results of simulation on computer show that the new model is capable and accurate; the new method to determine the slant distance is fast and effective.