FHD数字核旋仪标定必要性分析

Analysis on the Necessity of Calibration of FHD Unclear Precession Magnetometer

通过斜率法、差值法分析了中国部分FHD-2B核旋仪Z分量相对夜均值,发现未经过绝对观测基线值校正的相对观测数据存在不同程度的数据漂移情况,其原因主要包括季节变化带来的温度影响、各种原因造成的台阶影响、仪器墩倾斜等。鉴于此,日常工作应定期标定FHD仪,消除因各种漂移产生的测量误差。

In this paper,the relative night average value of the Z component of FHD-2B unclear precession was analyzed using the slope method and the differential technique.It is showed that all the relative night average value of Z component,that haven＇t been revised according to observation bases,wandered to some extent.The influences include temperature,steps caused by all kind of factors and the pier skew of instrument.So it is necessary to calibrate the instrument to eliminate the measurement error.