| 海道测量中测线定位数据处理的三种模型 |
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| 引用本文： | 徐卫明,刘雁春,肖付民.海道测量中测线定位数据处理的三种模型[J].海洋技术,2008,27(2):99-104. |
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| 作者姓名： | 徐卫明 刘雁春 肖付民 |
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| 作者单位： | 1. 海军大连舰艇学院,海测工程系,辽宁大连116018;清华大学,电子工程系,北京100084
2. 海军大连舰艇学院,海测工程系,辽宁大连116018 |
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| 摘 要： | 为了对海道测量中测线定位精度进行评估,以及为补偿测线系统误差的需要,提出了实测定位折线模型,同时在利用小波降噪算法求得拟合航迹线的基础上,提出了拟合定位测线的概念,针对测线的不同形态给出了拟合测线的另外两种模型,即拟合直线和拟合折线。仿真实验表明:提出的三种测线模型均满足1:2 000以下比例尺测图要求;在满足定位精度和测线正横水深梯度不超限的约束条件下,可以用拟合测线代替原始测线进行数据的后处理;三种测线模型对系统误差不存在"淹没效应";拟合折线可以方便地减弱测线内受方向、船速等系统误差的影响。
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| 关 键 词： | 海道测量 定位 测线模型 小波分析 |
| 文章编号： | 1003-2029(2008)02-0099-06 |
| 修稿时间： | 2007年10月28 |
Three Models for Processing of Survey-Line Positions in Hydrographic Survey |
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| XU Wei-ming,LIU Yan-chun,XIAO Fu-min.Three Models for Processing of Survey-Line Positions in Hydrographic Survey[J].Ocean Technology,2008,27(2):99-104. |
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| Authors: | XU Wei-ming LIU Yan-chun XIAO Fu-min |
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| Abstract: | For evaluating the precision of survey-line position and compensating survey-line system error in hydrographic survey,Measured-Position-Dogleg model(MPD)is proposed.Meanwhile,the Approximated-Course Line(ACL) concept is presented based on determining ACL with wavelet denoising algorithm,and two approximated survey-line models,namely Approximated Straight-Line(ASL) and Approximated-Dogleg Line(ADL),are given according to the different survey-line forms.Results of the simulation demonstrate that:(1) the proposed models could all meet the mapping requirements under the scale of 1:2 000;(2) the approximated survey-line models can replace the original measurement lines to process survey-line position data under the condition that position precision and survey-line transverse depth gradient are well within the required limit of hydrographic survey norms;(3) the three survey-line models do not exert inundated-effect to the system error;(4) ADL can conveniently reduce the measuring line system error affected by course and boat speed. |
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| Keywords: | hydrographic survey position survey-line model wavelet analysis |
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