澳门国际机场磁偏角测量数据处理及精度分析

Data processing and precision analysis of magnetic declination measurement at Macao International Airport

本文简要介绍了磁偏角测量的基本概念及测量原理,阐述了数据处理的过程及影响测量精度的因素。对澳门国际机场实测数据进行分析,结果表明:机场MN和MN2测点存在环境干扰,磁偏角偏离平均值最大7′56.7″;本次测量数据稳定可信,各测点磁偏角测值能真实反映机场地磁场空间分布基本特征;机场平均磁偏角标准差为2′14.0″,满足相关技术指标小于10′的要求;机场磁偏角测量结果与肇庆国际地磁基准台连续观测结果一致。

In this paper,the basic concept and principle of magnetic declination measurement are briefly introduced,and the process of data processing and the factors affecting the measurement accuracy are expounded.By analyzing the measured data of Macao International Airport,the results show that there are environmental disturbances at MN and MN2 measurement points in the airport,and the maximum deviation of magnetic declination from the mean value is 7′56.7″;The measured data are stable and reliable,and the measured values of magnetic declination at each measuring point can truly reflect the basic characteristics of the spatial distribution of the geomagnetic field in the airport;The standard deviation of the average magnetic declination of the airport is 2′14.0″,which meets the requirements of relevant technical indicators which is less than 10′;The measurement results of magnetic declination at the airfield are in good agreement with the continuous observation results at the Zhaoqing International Geomagnetic Datum Station.