肇庆地磁台磁通门磁力仪对比分析

对2003年肇庆地磁台GM3和Flare-plus磁通门磁力仪的H、D、Z分量观测数据.进行了趋势变化、均值、方差一致性检验以及基线值分析,认为两台磁力仪的观测数据具有同等观测精度和一致的变化趋势,仅均值存在较小的差别,已达到了国内高精度地磁观测的水平.与英国产的Flare-plus磁力仪相比,国产GM3磁力仪的观测精度和稳定性部分性能已达到世界上高精度数字地磁观测仪器的水平,但仪器的总体稳定性,传感器探头受温度影响的程度、仪器零漂等指标还需进一步提高.

Data comparative analysis for the fluxgate magnetometers in Zhaoqing Geomagnetic Observatory

In this paper, we comparatively analyzed the H, D and Z component data obtained by GM3 and Flare-plus fluxgate magnetometers in Zhaoqing Geomagnetic Observatory. According to the results of variation tendency, the inspection of mean value and variance and the analysis of baseline value, we think that two instruments are equal in precision and variation tendency but exist a little bit of difference in mean value. In comparison with Flare-plus magnetometer made in U.K., the observation precision and stability of GM3 magnetometer made in China have partially reached the advanced level possessed by the high precision geo-magnetometers in the world. But it should be improved to reduce the influence of the temperature on the sensor and zero drift.