【摘要】 针对我国资源三号卫星立体影像数据,利用GPS控制点,结合前视、下视、后视区域网平差精化有理函数模型,探讨了资源三号卫星立体影像数据用于重力中区地形改正的高精度DEM生成方法。通过1∶1万高精度DEM数据进行地改实验验证表明:资源三号卫星立体影像数据提取的DEM可以满足1∶20万区域重力测量中区地改精度要求,为我国重力测量中区地形改正提供了一条有效途径,拓展了资源三号数据在区域重力测量中的应用。更多还原

【Abstract】 This paper investigates the method of high-precision digital elevation model generation in gravity intermediate area topographic correction with ZY-3 stereo surveying satellite data.The rational function model has been refined with the GPS points and forward,nadir,backward image data.The experimental verification of topographic correction with 1 ∶ 10 000 high-precision digital elevation model data shows that the digital elevation model produced by ZY-3 stereo data can meet the precision requirement for 1 ∶ 200 000 gravity intermediate area topographic correction.The result obtained by the authors provides an effective means for gravity intermediate area topographic correction and expands the application of ZY-3 in regional gravity survey.更多还原