摘要
针对海洋磁力测量数据处理没有考虑拖鱼位置上下起伏对磁力测量精度的影响,仿真了起伏曲面的球体磁场效应。通过计算分析发现,测点垂直位置的变化对磁力测量精度有较大影响,为此提出了海洋磁力测量垂直空间改正的概念,并采用调和级数法对仿真数据进行垂直空间改正计算。计算结果表明,改正后的交叉点不符值中误差较改正前减小约101nT量级。
The new concept of spatial correction of sensor has been brought out. The spherical magnetic field is simulated on the undulating observation surface, vertical free-air correction is computed from harmonic series. The mean square error of crossing-point discrepancy is also computed. It is concluded that the mean square error of crossing-point is improved about 10 nT after the vertical free-air correction.
出处
《大地测量与地球动力学》
CSCD
北大核心
2008年第1期123-126,共4页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(40671161)
关键词
海洋磁力测量
垂直空间改正
交叉点不符值
中误差
测量精度
marine magnetic survey
vertical free-air correction
crossing-point discrepancy
mean square error
surveying accuracy
