2010-01-18-26日,在武汉、郑州、北京、沈阳4个高精度绝对重力点长基线上对8台LCR重力仪和4台CG-5重力仪进行了混合标定,标定结果表明:5台重力仪(其中4台为CG-5重力仪)显示出二次项的存在,但精度偏低.对于存在二次项的5台重力仪,一次项参数的单独标定结果均好于联合标定,其他重力仪的标定结果则基本保持不变.%The mixed calibration of 8 LCR and 4 CG-5 gravimeters carried out on the long baseline including 4 high precision absolute station of Wuhan, Zhengzhou, Beijing and Shenyang from May Sth to May 20th,2010 and from Jan 18th to Jan 26th,2010 is introduced. The results show that the quadratic terms exists in five gravimeters including all the 4 CG-5 gravimeter, but the precision of them is relatively low. If we only calibrate the first order term, the precision of the first order term of the five gravimeters is better than the joint calibration and for the other gravimeters it is basicallly invariant.
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