地磁整10′位近零观测方法的适用性研究

Study on the applicability of offset method at readings of tens minutes of arc in geomagnetic absolute measurement

针对"十五"地磁台网引进的秒级MINGEO DIM磁通门经纬仪的性能特点,结合台站地磁场背景值及仪器格值精度,对地磁整10′位近零观测方法的注意事项和约束条件进行系统分析,指出将MINGEO DIM磁通门经纬仪格值标定精度控制在不大于2‰的必要性及重要意义。

Base on the characteristics of the MINGEO DIM fluxgate theodolite introduced into the Chinese geomagnetic network during the tenth five year plan and the background value of the geomagnetic observatory, the applicability of offset method at readings of tens minutes of arc in geomagnetic absolute measurement was analyzed in this paper. The constraint on using this method was concluded and the importance to have scale value with precision not greater than 2‰ was pointed out.