摘要
精度评估和检核是似大地水准面模型构建和应用的前提.针对湖南省似大地水准面(HNGG2017)模型,引入大量全球卫星导航系统(GNSS)/水准观测成果以及历史模型,提出了内、外部精度以及特征地区综合检核方法.检核结果表明,模型的内、外符合精度优于2.2cm,与历史模型相比,新模型在北部常德汉寿、西南部永州江永等地区,精度得到显著改善.同时,湖南北部的壶瓶山地区的原水准数据可能存在系统性误差,有待采用更多数据验证.
Precision evaluation and verification is the precondition for the construction and application of GNSS quasi-geoid model.In view of the HNGG2017 model in Hunan Province,a large number of GNSS/leveling observations and historical models are introduced,and a comprehensive checking method for internal and external accuracy and characteristic areas is proposed.The checking results show that the internal and external coincidence accuracy of the model is better than 2.2 cm.Compared with the historical model,the accuracy of the new model has been significantly improved in the northern Changde Hanshou and the southwestern Yongzhou Jiangyong areas.At the same time,the raw level data of Hupingshan area in northern Hunan may have systematic errors,which needs to be verified by more data.
作者
曾翔强
敖敏思
陈春花
黎晨曦
ZENG Xiangqiang;AO Minsi;CHENG Chunhua;LI Chenxi(Hunan Institute of Geomatics Science and Technology,Changsha 410007,China;Hunan Natural Resources Monitoring Engineering Technology,Changsha 410007,China)
出处
《全球定位系统》
CSCD
2019年第1期54-61,共8页
Gnss World of China
基金
湖南省国土资源厅基础测绘专项项目
湖南省重点研发计划(2016SK2002)
长沙市科技计划(KQ1701171)
湖南省科技创新平台与人才计划(2018TP2040)
关键词
似大地水准面
高程异常
精度检测
内符合精度
外符合精度
quasi-geoid
height anomaly
accuracy detection
internal coincidence accura-cy
external coincidence accuracy
