GT-3A航空重力仪稳定性测试及精度分析  

Stability test and accuracy analysis of GT-3A airborne gravimeter

作　　者：孙文亮 刘胜震 陈景涛 郑文科 张伟琪 SUN Wenliang;LIU Shengzhen;CHEN Jingtao;ZHENG Wenke;ZHANG Weiqi(The First Geodetic Surveying Brigade,MNR,Xi'an,Shaanxi 710054,China)

机构地区：[1]自然资源部第一大地测量队,陕西西安710054

出　　处：《测绘标准化》2024年第3期158-164,共7页Standardization of Surveying and Mapping

基　　金：陕西测绘地理信息局科技创新项目(SCK20230-01)。

摘　　要：航空重力测量是快速获取重力加速度的重要技术手段,GT-3A航空重力仪是在GT-2A航空重力仪基础上改进的最新型号,其稳定性对重力测量结果的精确性有直接影响,因此,对GT-3A航空重力仪开展静态和动态测试十分必要。为更好地测试GT-3A航空重力仪稳定性,本文在动态测试中,同机搭载同型号航空重力仪共飞测线,并与已有的GT-2A测线数据结果进行比对。测试结果表明,本文测试的GT-3A航空重力仪静态观测数据标准差为0.22 mGal,满足其标称精度要求;动态测试其东西及南北向重复测线调平后精度分别为0.728 mGal和0.692 mGal,与同机共飞的同型航空重力仪测线数据调平后的结果符合程度高,与GT-2A测线结果的一致性较好,综合验证了GT-3A航空重力仪的稳定性。Airborne gravity measurement is an important technical means to quickly obtain gravity accel‐eration,GT-3A airborne gravimeter is the improved model of GT-2A airborne gravimeter,and its stabil‐ity can direct impact on the accuracy of the gravity measurements.Therefore,it is very necessary to carry out static and dynamic tests on GT-3A airborne gravimeter.In order to accurately test the stability of the GT-3A,this paper uses the same type of airborne gravimeter in the same aircraft during the dynamic tests and compares with the existing lines of GT-2A airborne gravimeter measurements.The results show that the standard deviation of the static observation data from the GT-3A airborne gravimeter tested in this pa‐per is 0.22 mGal,it meets the nominal accuracy requirements.The accuracy after leveling the East-West and North-South repeated measurement lines in the dynamic test is 0.728 mGal and 0.692 mGal,respec‐tively.The results after leveling with the measurements of the same type of airborne gravimeter flying to‐gether with the same aircraft are highly consistent,and the consistency with the GT-2A measurements is good,which comprehensively verifies the stability of the GT-3A airborne gravimeter.

关 键 词：GT-3A航空重力仪 航空重力测量 静态测试 动态测试 重复测线 

分 类 号：P223[天文地球—大地测量学与测量工程]