基于GF-3精细条带数据生产DEM的精度分析  

Accuracy analysis of DEM producing from GF-3 Fine Stripmap data

作　　者：席梦丹 张永洪 XI Mengdan;ZHANG Yonghong(Beijing PIESAT Intelligent Mapping Co.,Ltd.,Xi'an Mapping Institute,Xi'an,Shaanxi 710054,China;The First Institute of Photogrammetry and Remote Sensing,MNR,Xi'an,Shaanxi 710054,China)

机构地区：[1]北京航天宏图智能测绘有限公司西安测绘院,陕西西安710054 [2]自然资源部第一航测遥感院,陕西西安710054

出　　处：《测绘标准化》2024年第2期101-106,共6页Standardization of Surveying and Mapping

摘　　要：针对因受云、雾、雨等天气影响,无法采用光学卫星影像立体像对制作数字高程模型(DEM)的问题,本文利用国产高分三号(GF-3)卫星精细条带数据,采用合成孔径雷达干涉测量(InSAR)技术提取DEM,并与冰、云和陆地高程二号卫星(ICESat-2)激光测高数据进行比对验证精度。结果表明,采用GF-3卫星精细条带1(FSⅠ)模式的影像,相干性强,精度可靠,提取的DEM精度较高,整体中误差为8.89 m。在耕地、人造地表等区域,中误差优于6.50 m。因此,相对于其他数据,GF-3 FSⅠ数据适合在耕地、人造地表等区域进行干涉测量,该技术方法可为后续DEM的生产提供技术参考。As to the problem that the optical stereo pairs of staellite images cannot be used to create Digital 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 domestically-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 altimetry data.The results show that the images using the CF-3 satellite Fine Stripmap 1 mode have strong coherence,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.

关 键 词：高分三号 合成孔径雷达干涉测量 数字高程模型 冰、云和陆地高程二号卫星 精度评价 

分 类 号：P231.2[天文地球—摄影测量与遥感]