Accuracy analysis of DEM producing from GF-3 Fine Stripmap data
As to the problem that the optical stereo pairs of staellite images cannot be used to create Digit-al Elevation Model(DEM)due to weather conditions such as clouds,fog,and rain,this paper uses the Synthetic Aperture Radar Interferometry(InSAR)technology and Fine Stripmap data from the domesti-cally-developed High-Resolution Imaging Satellite Gaofen-3(GF-3)to extract DEM.The accuracy of DEM is verified by combining with Ice,Cloud,and land Elevation Satellite-2(ICESat-2)laser altime-try data.The results show that the images using the GF-3 satellite Fine Stripmap 1 mode have strong co-herence,reliable accuracy and high accuracy in DEM extraction.The overall mean squared error is 8.89 m,and it is better than 6.50 m in areas such as cultivated land and artificial surface.Compared with other data types,the GF-3 satellite FS I data is particularly suitable for interferometric measurements in areas such as cultivated land and artificial surfaces.This methodological approach can provide technical reference for future DEM production.
万方数据
维普
