L&R航空重力仪摆杆尺度因子的确定与分析  

Determination and Analysis of the Beam Scale Factor for the LaCoste&Romberg Airborne Gravimeter

作　　者：孙中苗[1] 夏哲仁[1] 李迎春[1] 

机构地区：[1]西安测绘研究所,西安市雁塔路中段1号710054

出　　处：《武汉大学学报（信息科学版）》2002年第4期367-371,共5页Geomatics and Information Science of Wuhan University

基　　金：国家攀登计划资助项目 (970 2 3 10 0 3 )

摘　　要：讨论了K因子的实验确定方法 ,基于重力仪检测平台的检测数据和航空重力测量实测数据 。The beam scale factor (called K _factor) is one of the important parameters for the AIR_SEA gravimeter.Usually in all classical processing of marine or airborne gravity data,the K _factor is postulated to be a constant.Presumably,this is not true for the large angular deviations of the beam caused by the own movement of the boat or the aircraft.Therefore we propose an experimental procedure to determine the relation K=K (B) where B is the beam angular position.Based on this relation,the effects on the results due to different K _factor (a constant or a variable) are analyzed in detail by using the data from the test platform for gravimeter and the actual data for airborne gravimetry.Some initial conclusions can be made:① For the data from the test platform,the effects on the results due to different K _factor (a constant or a variable) are completely similar after using digital filter.The reason of this is that the changes of the beam positions are very regular.② For the actual flight data,the difference of the effects on the results due to different K _factor (a constant or a variable) is relatively large,and the standard derivation of the difference can reach 10 mGal after using digital filter,Thus it is very important to consider this difference in the real data processing.③ We use the polynomial fit to determine the relation K= K (B) . There are no significant effects due to the different orders for the polynomial,and a second orders polynomial can be chosen actually.

关 键 词：L&R航空重力仪 航空重力测量 摆杆尺度因子 FIR滤波器 K因子 

分 类 号：P223.4[天文地球—大地测量学与测量工程]