利用观测资料对CG-5型与LCR-G型相对重力仪精度初步评定

PRIMARY EVALUATION OF MEASURING ACCURACY OF LCR-G AND CG-5 RELATIVE GRAVIMETER USING OBSERVATION DATA

利用新疆测区2005～2011年流动重力资料对CG-5和LCR-G两种型号相对重力仪的精度进行了初步评定,首先对选择区域的流动重力资料进行了整体统一平差计算,通过精度评定,计算出不同时间各仪器的自差、互差、单位权中误差和点值平均精度。初步分析表明:两种型号仪器所获得观测资料质量均可靠,但CG-5型相对重力仪各项精度指标均优于LCR-G型相对重力仪,且CG-5型相对重力仪在野外观测环境中较稳定,性能较好,可信度较强。

Using mobile gravity data recorded by CG-5 and LCR-G in Xinjiang from 2005 to 2011,this paper made a primary evaluation of measuring accuracy.Through accuracy evaluation,they calculated deviation、mutual difference、mean square error of unit weight and mean accuracy of different instruments at different times by united adjusting mobile gravity data in selected region.The analysis shows that observation data of both instruments were reliable,but CG-5 was significantly better than LCR-G in several aspects such as： more stable,more reliable and better performance.