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一、概述北京地磁台自1957年正式观测以来,一直使用经典型磁法仪器测量地磁场水平强度(H)的绝对值。1957—1975年间用马丁(Mating)标准地磁经纬仪,1976年至今则用舒米特(Schmidt)标准地磁经纬仪。1978年12月,国家地震局地球物理所九室、中国科学院地球物理所五室和北京地磁台,在北京白家疃台进行了一次多种仪器对水平强度(H)的联合比测,采用舒米特磁经纬仪、CHD—5型国产小核旋分量仪和QHYC—75型大
I. Overview Beijing Geomagnetic Observatory has been using the classical magnetic method to measure the absolute value of the horizontal magnetic field intensity (H) since its formal observation in 1957. Geomagnetic theodolite was used by Mating between 1957 and 1975, and the Schmidt geodetic standard was used since 1976. December 1978, the State Seismological Bureau, Institute of Geophysics, nine rooms, Institute of Geophysics, Chinese Academy of Sciences Room 5 and Beijing Geomagnetic Taiwan, Baijiatuan in Beijing conducted a variety of instruments on the level of intensity (H) joint ratio measured using Schmidt magnetic theodolite, CHD-5-made small-core spin-QMI-75 type and large