航空重力地形改正技术研究及应用  

Research and application of terrain correction calculation in airborne gravity

作　　者：刘波[1,2,3] 彭莉红 王志宏[1,2,3] 孙栋华 杨波[1,2,3] 石岩 LIU Bo;PENG LiHong;WANG ZhiHong;SUN DongHua;YANG Bo;SHI Yan(Airborne Survey and Remote Sensing Center of Nuclear Industry,Shijiazhuang 050002,China;CNNC Key Laboratory of Uranium Resources Geophysical Exploration Technology,Shijiazhuang 050002,China;Hebei Key Laboratory of Airborne Survey and Remote Sensing Technology,Shijiazhuang 050002,China)

机构地区：[1]核工业航测遥感中心,石家庄050002 [2]中核集团铀资源地球物理勘查技术(重点实验室),石家庄050002 [3]河北省航空探测与遥感技术重点实验室,石家庄050002

出　　处：《地球物理学进展》2023年第2期578-587,共10页Progress in Geophysics

摘　　要：采用近、中区质量柱与远区质量线地改模型相结合的方法研究了最大地改半径及不同网格间距高程数据对地形改正效果的影响.研究中采用不同的高程数据间距和合理地改半径配对进行计算,选择最佳的网格间距,以提高地形改正效率和整体精度.在满足地改精度的前提下研究区160 km外的地形质量对测点的重力影响可以忽略不计.研究结果为今后同类型航空重力测量地形改正提供方法及参量选取参考.The influence of the terrain correction radius and elevation data with different grid spacing on the effect of terrain correction is studied by using the flat topped square prism approach of Nagy for the near and intermediate zone, and using the rod formula for the far zone. In the study, DEM datas with different grid apacing and reasonable radius matching are used for calculation, and the best grid spacing is selected to improve the efficiency and overall accuracy of terrain correction.On the premise of meeting the accuracy of geological reform, the influence of terrain quality 160 km away from the study area on the gravity of the survey point can be ignored. The research results provide a reference for the terrain correction method and parameter selection of the same type of airborne gravimetry in the future.

关 键 词：航空重力测量 地形改正 最大地改半径 高程数据网格间距 

分 类 号：P312[天文地球—固体地球物理学] P631[天文地球—地球物理学]