长距离跨海高程基准传递方法研究及广西北部湾工程验证  

Long-distance cross-sea height datum transfer method and verification in the Beibu Gulf engineering in Northern Guangxi

作　　者：钟昌海 林自乐 黄昕 孔建[3] ZHONG Changhai;LIN Zile;HUANG Xin;KONG Jian(Guangxi Institute of Natural Resources Survey and Monitoring,Nanning 530023,China;Technology Innovation Center for Natural Resources Monitoring and Evaluation of Beibu Gulf Economic Zone Ministry of Natural Resources,Nanning 530023,China;Chinese Antarctic Center of Surveying and Mapping,Wuhan University,Wuhan 430079,China)

机构地区：[1]广西壮族自治区自然资源调查监测院,广西南宁530023 [2]自然资源部北部湾经济区自然资源监测评价工程技术创新中心,广西南宁530023 [3]武汉大学中国南极测绘研究中心,湖北武汉430079

出　　处：《测绘通报》2024年第2期161-164,182,共5页Bulletin of Surveying and Mapping

基　　金：广西重点研发计划(桂科AB22080077);广西科技基地和人才专项(桂科AD20238044)。

摘　　要：针对陆海基准高程传递过程中传统方法的测量精度受海岛与陆地距离、陆海环境等因素的影响,对海域内的多个不连续岛屿进行测量时过程较为复杂的问题,本文提出了利用高精度似大地水准面进行高程传递的方法,研究了误差积累因素,给出了高程传递的理论模型及具体的技术流程。在北部湾海域,利用该方法将1985国家高程基准由陆地传递到距离北海市40 km的涠洲岛和斜阳岛上,传递后GNSS水准点间的高程差与涠洲岛二等水准测量成果的独立高程差均优于±4.1 cm,为全国范围离岛高程传递工程提供了实践参考。The traditional methods for transferring height between land and sea benchmarking points are affected by factors such as the distance between islands and mainland,and the land-sea environment,leading to measurement inaccuracies.In this article,we propose a method using high-precision quasi-geoid surfaces for height transfer.We investigate error accumulation factors,provide a theoretical model for height transfer,and describe the specific technical process.In the Beibu Gulf area,this method is used to transfer the 1985 national height datum from the mainland to Weizhou Island and Xieyang Island,which are located 40 kilometers away from Beihai city.The elevation differences between GNSS leveling points after the transfer and the independent elevation differences from the second-order leveling measurement on Weizhou Island are all better than±4.1 cm.This study provides practical reference for height transfer projects in offshore areas nationwide.

关 键 词：长距离跨海高程传递 误差传播 似大地水准面 GNSS 水准测量 

分 类 号：P22[天文地球—大地测量学与测量工程]