青海省2000重力基本网的构建

The Construction of Qinghai 2000 Gravity Network

为填补我省重力基本网空白区,解决在探矿找矿、地球物理科学研究领域缺少重力基准的问题,青海省自然资源厅确立了“北斗卫星空间定位基准站网”项目。项目以省内现有重力基准资源为基础,新建了15座重力基本点,并采用高精度的CG-5/CG-6相对重力仪进行了联测,联测精度优于10×10^(-8)ms^(-2),平差后的重力成果精度优于10×10^(-8)ms^(-2),技术指标均优于《国家重力控制测量规范》要求,项目建设方法对其他地区开展类似工作具有一定的借鉴意义。

In order to fill the blank area of gravity in Qinghai province and solve the problem of lack of gravity datum in the field of prospecting and geophysical science research,Qinghai Provincial Department of Natural Resources established the project of"Beidou Satellite Spatial Positioning Datum Station Network".Based on the existing gravity reference resources in Qinghai province,the project built 15 gravity basic points and used high-precision CG-5/CG-6 relative gravimeter to carry out joint measurement.The joint measurement accuracy is better than 10×10^(-8)ms^(-2),and the gravity results after adjustment are better than 10×10^(-8)ms^(-2).The technical indicators are better than the requirements of"Specifications for the gravimetry control".The project construction method has certain reference significance for other areas to carry out similar work.