航线上重力基准构建的单点延拓方法  

Single point continuation method for constructing gravity datum on the flight course

作　　者：王云鹏 刘晓刚 宋颖[1,2] 庞振兴 WANG YunPeng;LIU XiaoGang;SONG Ying;PANG ZhenXing(State Key Laboratory of GeoInformation Engineering,Xi\an 710054,China;Xi\an Research Institute of Surveying and Mapping,Xi\an 710054,China)

机构地区：[1]地理信息工程国家重点实验室,西安710054 [2]西安测绘研究所,西安710054

出　　处：《地球物理学进展》2021年第4期1464-1469,共6页Progress in Geophysics

基　　金：国家重点研发计划(2018YFC1503806);国家自然科学基金(42174001,41774018);地理信息工程国家重点实验室开放研究基金(SKLGIE2021-ZZ-4)联合资助。

摘　　要：本文利用联合低阶重力位模型和地形数据的单点延拓方法将地面重力观测数据延拓到空中,构建了航线上重力基准,实现了两套航空重力观测数据的质量评价,实验结果表明:(1)单点延拓方法完全可以应用于航空重力观测数据的外部精度检核,效果良好,性价比高;(2)相比仅采用重力位模型或地形数据进行单点延拓计算,联合重力位模型和地形数据的延拓计算对航空重力观测数据的评估结果更加可靠;(3)联合低阶重力位模型和地形数据的单点延拓方法计算速度快、效率高.本文研究方法,也可适用于新研航空重力仪的标度因数、零偏等参数的在线标定.In this paper, the ground gravimetry data are continued to the height of flight course by using a single point continuation method based on low-order gravity potential model and the terrain data, and the gravity datum on the flight course is constructed, then the quality evaluation of two sets of airborne gravimetry data are realized. Experimental results show that the single point continuation method can be fully applied to the external precision evaluation of airborne gravimetry data, with good effect and high cost effectiveness. Compared with the single point continuation calculation using the gravity potential model or the terrain data only, the airborne gravimetry data evaluation results of the combination of gravity potential model and the terrain data are more reliable. The single point continuation method based on low-order gravity potential model and the terrain data is fast and efficient. Method studied in this paper can also be used for online calibration of scale factor, zero deviation and other parameters of newly developed airborne gravimetry instruments.

关 键 词：航空重力测量 向上延拓 单点延拓方法 重力位模型 局部地形改正 

分 类 号：P223[天文地球—大地测量学与测量工程]