干涉合成孔径雷达成像技术的研究

Research on Interferometric SAR Imaging

通过对干涉合成孔径雷达（ Ｉｎｔｅｒｆｅｒｏｍ ｅｔｉｃ Ｓ Ａ Ｒ）成像处理中解相位模糊和地形转换问题的研究，给出了一种有效的相位解模糊的方法，该方法具有良好的稳定性和较小的误差，且无误差传递。另外，提出了一种如何将干涉相位转换成地形高度的方法，该方法提高了干涉相位与地形高度之间的转换精度。利用美国 Ｎ Ａ Ｓ Ａ 提供的三峡地区的 Ｌ 波段的 Ｓ Ｉ Ｒ Ｃ的并行轨道数据，结合所提的方法，得到了局部区域的相对高度图。

This paper discribes InSAR image processing methods and presents a new approach for phase unwrapping of InSAR.The method has advantages of stability and less error.By using the method there is not error propagation and there will be no global errors.In addition,the method to estimate terrain height for InSAR is also put forwards.The method improves the accuracy of relation between phase difference and terrain height.At last,by using the L band data of SIR\|C of Three\|Gorge area of China,the relative digital elevation model of local area is obtained.