NEMP三站时差法定位理论误差分析

Theoretic Location-Error Analysis of the Method of Three Stations Time of Arrival by NEMP

通过核电磁脉冲(NEMP)进行核爆探测具有探测距离远、速度快、受天侯影响小等优点。但由于电磁脉冲传播速度快,定位精度一直是核电磁脉冲探测面临的主要问题。通过对定位误差的计算和分析,不仅可以给出电磁脉冲核爆探测的定位精度,而且对电磁脉冲核爆探测时的测站布局、电路设计、数据处理方法等有一定的参考价值。该文推导了NEMP三站时差法定位理论误差计算公式。根据公式,对不同的基线夹角、不同的时差精度、不同的基线长所对应的定位误差进行了计算,并绘出了定位误差分布图。

The advantages of the nuclear explosion detection by electromagnetic pulse are the quick speed, the far distance, and the less influence by weather, etc. However, because of the quick transportation speed of electromagnetic pulse, the accuracy of location is always one of the main problems facing the electromagnetic pulse detection. The calculation and analysis not only offer the location error, but also are useful to the stations layout, the electrocircuit design and the method of data disposal. In this paper, the basic formula of location error are deduced, and the location errors corresponding to different angles of base-line, different length of base-line and different accuracy of time measurement are computed. Distributing diagrams of errors are also drawn.