静海地磁台天文方位角测量及其质量评估

MEASUREMENT OF ASTRONOMIC AZIMUTH ANGLE IN JINGHAI STATION AND ITS QUALITY EVALUATION

摘要:

为适应高精度新型地磁仪器对观测磁偏角和磁倾角条件的需要,应用经典的天文测量方法,精密测定了天津静海地磁台改造后的7个观测墩至4个方位标志的方位角,共取得了38个方位角参数,平均标准偏差达到±1.2".使该台在磁偏角测量或仪器验收中可供7套仪器同时观测,并可以做到全天候观测.

Abstract:

In order to adapt to the observational condition of magnetic declination and inclination with the high resolution and precision magnetograph, the azimuths among 7 measurement platform sand 4 azimuth marks in reconstructed Jinghai station, Seismological Bereau of Tianjing, are precisely measured by using classical astro-geodetic method, and 38 parameters with average error ±1.2″ are gained. After the measurements, 7 sets of instrument can be used at same time in all-weather.