摘要
数字高程模型DEM重建是星载寄生式干涉合成孔径雷达InSAR信号处理的重要一步,是利用干涉图和卫星参数等来求解地面高程及位置。针对星载寄生式InSAR构成为双站的特点,在重建方法上进行了相应改进。通过分析重建方程组可知,重建高程精度对系统基线误差很敏感,对此提出了利用控制点来减小基线误差对重建高程精度的影响,并进行了定量分析。
DEM reconstruction is an important step of signal processing of spaceborne parasitic InSAR. It uses interferograms and satellite parameters to solve elevation and position of the Earth surface. According to the bistatic character istics of spaeeborne parasitic InSAR, the DEM reconstruction method is correspondingly mproved. The analysis of DEM reconstruction formulas shows that reconstruction precision is sensitive to baseine error. In order to overcome this shortcoming, a ground control point is used to reduce the influence of baseine error on reconstruction precision. This method is analyzed quantitatively.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2007年第2期182-185,共4页
Systems Engineering and Electronics
