CG-5相对重力仪野外实验精度分析  

Precision analysis on CG-5 relative gravimeter through field experiments

作　　者：于红娟[1] 郭金运[1] 刘扬[2] 沈毅[1] 孔巧丽[1] 

机构地区：[1]山东科技大学测绘科学与工程学院,山东青岛266590 [2]安徽理工大学测绘学院,安徽淮南232001

出　　处：《测绘科学》2017年第3期155-160,共6页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41374009);国家科技基础性工作专项(2015FY310200);山东省自然科学基金项目(ZR2013DM009);山东科技大学科研创新团队支持计划项目(2014TDJH101)

摘　　要：针对CG-5相对重力仪零点漂移规律对测量精度的影响及仪器系统阐述欠缺等问题,通过静态、动态和布设相对重力网实验对CG-5相对重力仪进行测试,研究CG-5型相对重力仪的漂移规律、性能及精度。结果表明,仪器的静态零点漂移线性度很好,6d的零漂率变化不大,总体呈下降的趋势。经过零点漂移改正后的动态零漂率很小,仅为5μGal/h,动态实验的动态误差为2.207μGal,在限差10μGal之内。相对重力网平差精度较高,均在限差5μGal之内。CG-5相对重力仪在测试中表现出了较稳定的状态,测得数据精度较高,符合厂商提供的标称精度。Aiming at the problem that there is the influence of zero drift on measurement accuracy and a lack of instrument system description of CG-5relative gravimeter,the static,dynamic and relative gravity network experiments were carried out to study the zero drift,performance and accuracy of the CG-5relative gravimeter.The results indicate that the static zero drift shows a good linearity,and there is a little change and an overall decrease trend about the six days of zero drifts.The dynamic zero drift is very small,only about 5μGal/h.The dynamic error is 2.207μGal in dynamic experiment after the static zero drift correction,within the tolerance of 10μGal.The root mean square errors by relative gravity network adjustment are all within the tolerance 5μGal.CG-5relative gravimeter shows a relatively stable state and high accuracy performance to acquire data,which can meet the nominal accuracy provided by the vendors.

关 键 词：CG-5相对重力仪 静态零点漂移 动态零点漂移 动态误差 相对重力网 

分 类 号：P223.3[天文地球—大地测量学与测量工程]