基于CORS基准站建立二等重力网

Establishment of Second-class Gravity Network Based on CORS Reference Stations

青海省连续运行参考站(QHCORS)作为二等重力点,选点符合国家现行规范的要求。以2000国家重力基本网、国家重力基本网补测与加密重力测量项目、1606工程重力基准网为起算点,利用两台CG-5型相对重力仪在QHCORS基准站上进行了二等重力测量,建立了青海省二等重力网。平差后点位重力成果精度平均中误差为18.00×10-8ms-2,满足规范要求。

Qinghai Province continuously operating reference station(QHCORS)as second-class gravity point,the selected point conforms to the requirements of the current national standards.Taking 2000 national gravity basic network,national gravity basic network supplementary and encrypted gravity measurement project,and 1606 engineering gravity basic network as the starting points,we used two CG-5 relative gravimeters to carry out second-class gravimetry at the QHCORS,and established a second-class gravity network in Qinghai.The average error of the accuracy of point gravity results after adjustment is 18.00×10-8 ms-2,which can meet specification requirements.