国家重力基准点建设及精度评定

Construction of the National Gravity Datum Points and Accuracy Assessment

基于我国现有重力基准现状,提出加密我国重力基准的建设思路。利用国家GNSS连续运行基准站内布设的重力基准点,在我国大陆加密布测50个绝对重力点,提高我国重力基准点的分布密度。分别利用FG5和A10两台高精度绝对重力仪设备进行观测比对,获得100点次的高精度绝对重力成果;分析比较了两台设备观测的重力成果的精度统计,验证了A10观测的重力成果可基本满足高精度绝对重力观测。本工程建设的绝对重力成果可满足石油、天然气物探、地质勘探等对国家高精度重力基准点的使用需求。

Based on the present situation of gravity datum in our country, this paper puts forward the construction idea of encrypting the gravity datum in China continent. The gravity monuments used the existing infrastructure in the national GNSS continuously operating reference station, which nearly 50 absolute gravity points were chosen to improve the distribution density of gravity datum. Respectively, two high-precision absolute gravimeter of FG5 and A10 devices were used to observe and compare to obtain 100 times of high-precision absolute gravitation results. The accuracy of statistics of the gravity results observed by the two devices were analyzed and compared. It is verified that the gravity results obtained by the A10 can meet the high precision absolute gravity observations. The absolute gravity results of this project can meet the requirements of the national high-precision gravity datum points for petroleum, natural gas exploration and geological exploration.