沿岸多模式GNSS三维水深测量方法研究
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摘要
在沿岸水下地形测量中,高程控制是难点,在远离岸边的区域,不仅布设潮位站困难,而且潮位站水位改正的精度也难以保证,为提高沿岸水域测量的可靠性和灵活性,在河口区域的水深测量项目中进行了RTK、PPK、PPP3种模式的同步作业方式研究。结果表明,基于GNSS多模式三维水深测量的方法能有效提高水位改正的精度和可靠性。无论测区离岸距离多远,可以同步采用RTK、PPK和PPP的方式进行高程控制,这3种模式的高程测量差值均方差接近0.10m,精度能满足沿岸水域一般比例尺地形测量的高程精度要求。
In the work of coastal underwater topographic survey,elevation control is difficult.In areas far from the shore,it is difficult to lay tidal stations and to guarantee the accuracy of the water level correction.In order to improve the reliability and flexibility of coastal underwater topographic survey,research on synchronous operation of RTK,PPK and PPP in the bathymetry project in estuary area is carried out.The results show that the method based on GNSS multi-mode three-dimensional bathymetry can effectively improve the flexibility and reliability of water level correction.No matter how far the survey area is from the shore,the methods of RTK,PPK and PPP can be used simultaneously for elevation control.The mean square deviation of elevation measurement among the three methods is close to 0.10 m,and the accuracy can meet the elevation accuracy requirements of coastal general scale topographic survey.
In the work of coastal underwater topographic survey,elevation control is difficult.In areas far from the shore,it is difficult to lay tidal stations and to guarantee the accuracy of the water level correction.In order to improve the reliability and flexibility of coastal underwater topographic survey,research on synchronous operation of RTK,PPK and PPP in the bathymetry project in estuary area is carried out.The results show that the method based on GNSS multi-mode three-dimensional bathymetry can effectively improve the flexibility and reliability of water level correction.No matter how far the survey area is from the shore,the methods of RTK,PPK and PPP can be used simultaneously for elevation control.The mean square deviation of elevation measurement among the three methods is close to 0.10 m,and the accuracy can meet the elevation accuracy requirements of coastal general scale topographic survey.
引文
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[11] 陈仲怀,廖超明,宋传峰,等.基于PPP的CGCS 2000坐标计算方法研究[J].测绘通报,2014(2):10-12.
[12] 杜向锋,张兴福,李智强.精密单点定位技术在控制测量中的应用[J].工程勘察,2015(2):75-78.
[2] 吴敬文,周儒夫,陈建民,等.RTK三维水深测量的实施与精度控制[J].现代测绘,2016,39 (4):18-20.
[3] 肖帅龙.GPS精密单点定位原理及应用[J].产业与科技论坛,2012,11(2):63- 64.
[4] 陈安京.GPS动态精密单点定位(PPP)研究[D].南京:东南大学,2007.
[5] 闫志闯,楼楠,李婧.对流层参数估计策略对PPP精度影响分析[J].测绘工程,2019,28(1):5-9.
[6] 郑建雷,黄张裕,刘国超.单频精密单点定位中电离层延迟改正方法[J].测绘与空间地理信息,2015,38(2):144-146.
[7] 魏小辉.基于实时精密单点定位的长距离航道潮位控制方案[J].中国水运,2018(6):44- 45.
[8] 许家琨.沿岸当地平均海面的高程求取与应用[J].海洋测绘,2002,22(5):16-19.
[9] 崔杨,暴景阳,许军,等.关于海洋无缝垂直基准体系建立的思考[J].测绘通报,2014(2):125-127.
[10] 董建军,徐爱功,高猛,等.GPS实时精密单点定位精度与收敛性分析[J].导航定位学报,2018,6(3):92-97.
[11] 陈仲怀,廖超明,宋传峰,等.基于PPP的CGCS 2000坐标计算方法研究[J].测绘通报,2014(2):10-12.
[12] 杜向锋,张兴福,李智强.精密单点定位技术在控制测量中的应用[J].工程勘察,2015(2):75-78.