| 海底控制网测量和解算中的几个关键问题 |
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| 引用本文： | 赵建虎,梁文彪.海底控制网测量和解算中的几个关键问题[J].测绘学报,2019,48(9):1197-1202. |
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| 作者姓名： | 赵建虎 梁文彪 |
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| 作者单位： | 武汉大学测绘学院,湖北 武汉430079;武汉大学海洋研究院,湖北 武汉430079;武汉大学测绘学院,湖北 武汉430079;武汉大学海洋研究院,湖北 武汉430079 |
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| 基金项目： | 国家重点研发计划（2016YFB0501703） |
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| 摘 要： | 剖析了影响海底控制网定位精度的几个问题,认为海洋声速短时变化大且规律性不强,构建声速场模型是削弱声速代表性误差的有效途径。声速对测距定位影响还与波束入射角和深度相关,影响显著,不容忽视;在声速稳定水域,利用入射角近似相同的观测距离差分定位可取得较高的精度,否则精度难以保证。引入压力传感器提供的深度或深度差,利于改善控制网垂直解精度,但需顾及两点间潮高差。
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| 关 键 词： | 海底控制网 精度 声速 差分定位 深度约束 |
| 收稿时间： | 2019-04-29 |
| 修稿时间： | 2019-05-12 |
Some key points of submarine control network measurement and calculation |
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| ZHAO Jianhu,LIANG Wenbiao.Some key points of submarine control network measurement and calculation[J].Acta Geodaetica et Cartographica Sinica,2019,48(9):1197-1202. |
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| Authors: | ZHAO Jianhu LIANG Wenbiao |
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| Institution: | 1. School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China;2. Institute of Marine Science and Technology, Wuhan University, Wuhan 430079, China |
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| Abstract: | Several problems affecting the positioning accuracy of the submarine control network are analyzed. It is considered that the ocean sound velocity changes greatly in a short time and the regularity is not strong. Constructing the sound velocity field is an effective way to weaken the representative error of the sound velocity. The influence of sound velocity on the location is also related to the beam incident angle and depth. The impact is significant and cannot be ignored. In the sound-stable waters, when the incident angles are approximately the same, high accuracy can be achieved by differential positioning with observation distance, otherwise the accuracy is difficult to guarantee. The depth or depth difference provided by the pressure sensor is introduced to improve the vertical solution precision of the control network, but the difference of tide height between two control points should be taken into account. |
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| Keywords: | submarine control network positioning precision sound velocity differential positioning depth constraint |
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