摘要
针对航空磁测数据处理中存在的飞机在飞行高度上起伏变化的问题,传统的Taylor多项式模型在构建局域地磁场模型时,通常只选择平面经纬度方向坐标作为变量,而忽略了飞行高度的变化对建模结果的影响。这里引入顾及飞行高度变化影响的Taylor多项式方法构建地磁场模型,分别利用模拟和实测的航空磁测数据,研究了忽略和顾及飞行高度影响的Taylor多项式法;并分析了截断阶数与中误差的关系。从而得出顾及飞行高度影响的方法可以明显地提高建模的精度和改善模型的边界效应的结论。
According to the problems that aeromagnetic data processing in flying height direction changes, when constructing the local geomagnetic field model with traditional Taylor polynomial model, only plane longitude and latitude coordinates are chosen as variables conventionally, ignoring the influence of variation of flight altitude direction on the modeling results. Here introduces the geomagnetic model constructed by Taylor polynomial method considering the ranges of flight altitude. It is used that simulated and measuredaeromagnetic data, and research the influence of Taylor polynomial method which ignoring and consideringflight altitude, and then analyzes the relationship between the truncation order and RMS. Finally, it is concluded that the method consideringflight altitude effect can significantly increase the accuracy and weaken boundary effects of the model.
出处
《测绘科学技术学报》
CSCD
北大核心
2016年第3期241-246,共6页
Journal of Geomatics Science and Technology
基金
国家自然科学基金项目(41574010
41274045
41476087)
地理信息工程国家重点实验室开放基金项目(SKLGIE2014-M-1-1)
关键词
航空磁力测量
飞行高度
建模
泰勒多项式
边界效应
aeromagnetic survey
flight altitude
modeling
Taylor polynomial
boundary effect
