一种基于干涉成像几何的水体类地表干涉处理方法

An Approach for the Earth's Surface of Water Interferometric ProcessingBased on Imaging Geometry

干涉合成孔径雷达在地形高程测绘方面有其独特的优点。工程应用中,场景中的水体类地表由于后向散射系数极小,相干性差,导致相位信息的噪声大,最终严重影响反演DEM的质量,以及由此得到的雷达正射影像的质量。提出了一种基于干涉成像几何的水体类地表在相位域进行干涉处理的方法,恢复场景中水体区真实相位,以得到高质量的DEM。通过对实测的机载干涉SAR数据进行处理,取得了很好的效果,验证了算法的有效性。

Interferometric Synthetic Aperture Radar （InSAR） has many inimitable advantages in the field of digital terrain modeling. In application, the phase of the earth＇s surface of water in the scene derived is not reliable, because the backscattering coefficient of these areas is very small and the coherence is of low quality. These areas have a bad effect on the quality of DEM, so as the quality of radar orthophoto map. In this paper, we present an approach in the field of phase for the earth＇s surface of water based on radar- terrain imaging geometry. Experiment result of DEM generated by data obtained from the air-borne InSAR platform shows the quality of DEM has been improved much, this demonstrates effectiveness of the algorhhm.