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。
This paper investigates the method of high-precision digital elevation model generation in gravity intermediate area topograph- ic 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.
出处
《物探与化探》
CAS
CSCD
2013年第5期822-826,共5页
Geophysical and Geochemical Exploration
基金
国家重点基础研究发展计划(973计划)(2013CB733202
2012CB719902)
