利用航磁重复线测量内符合精度消除航磁梯度测量中的转向差

Elimination of steering difference in aeromagnetic gradient measurement using internal accord accuracy for test repeat line in aeromagnetic survey

为消除吊舱式航磁梯度测量中梯度仪转向差的影响,评价航磁梯度系统的测量精度,笔者尝试了计算重复线内符合精度的方法。通过推导,给出了重复线内符合精度新的计算公式,该公式和地面重力、磁法测量中重复观测、仪器多台一致性总精度计算及航空重力、磁法测量中利用测线与切割线交叉点计算总精度的公式具有形式上的统一。利用改进的水平调整方法显著的消除了航磁梯度测量中的转向差,并客观评价了梯度系统的测量精度。

This paper points out that the previous calculation formula of the accuracy of the airborne gravity and magnetic survey does not conform to the statistical principle. The authors present a new calculating formula,which unifies not only the consistency of multiinstrument precision calculation for gravity and magnetic measurement on ground but also total precision calculation formula for airborne gravity and magnetic measurement using the intersection of survey line and tie line,and can be applied to aeromagnetic gradient measurement to eliminate gradient steering difference and to evaluate the accuracy of the gradient measurement system.