| 基于DTU重力数据检查海洋重力测量成果的质量 |
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| 引用本文： | 董庆亮,陈洁,潘乐,王韶玉,沈康.基于DTU重力数据检查海洋重力测量成果的质量[J].海洋测绘,2020,40(2):33-35. |
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| 作者姓名： | 董庆亮 陈洁 潘乐 王韶玉 沈康 |
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| 作者单位： | 91650部队,广东广州510320;广州海洋地质调查局,广东广州510760 |
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| 基金项目： | 国家科技研发专项(2016YFC0303000) |
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| 摘 要： | 在海上复杂的环境下进行重力测量,重力仪及技术人员的操作难免会出现各种各样的问题,导致测量的成果精度降低,甚至不符合规范要求。目前检查海洋重力测量成果质量的主要方法是内符合法,主要采用主测线、检测线交叉点的差值,或重复测线相邻点的差值来评估测量成果的质量。介绍了内符合法存在的弊端,比较了DTU重力数据与重力仪实测数据的精度,叙述了基于DTU重力数据检查海洋重力测量成果较大系统差的可行性,以模型数据为外符合数据源来检查实测成果的质量,作为内符合法的补充,是十分必要的。
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| 关 键 词： | 海洋重力测量 DTU重力数据 成果质量 内符合精度 外符合精度 |
Assessment of the Quality of Marine Gravity Measurements Based on the DTU Model Data |
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| DONG Qingliang,CHEN Jie,PAN Le,WANG Shaoyu,SHEN Kang.Assessment of the Quality of Marine Gravity Measurements Based on the DTU Model Data[J].Hydrographic Surveying and Charting,2020,40(2):33-35. |
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| Authors: | DONG Qingliang CHEN Jie PAN Le WANG Shaoyu SHEN Kang |
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| Institution: | 91650 Troops,Guangzhou 510320 ,China;Guangzhou Marine Geological Survey,Guangzhou 510760 ,China |
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| Abstract: | The conducting of gravity survey and the operation of gravimeter under the complicate marine environment can cause various problems, lead to the decrease of quality of gravity measurements and even not meet the requirement of specifications. The main assessment method of marine gravity measurements is the inner-comparison at the crossover points between the main survey line and the check survey line, or the comparison between the repeat survey lines. In this paper, the disadvantages of the inner-comparison method is introduced, the comparison between the DTU model data and the true in situ gravity measurements is carried out. The probability of assessment of the bigger systematic errors of marine gravity measurements based on the DTU model data is studied. It is a necessary supplement to the innercomparison method by using model data as an external calibration. |
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