| 机载LIDAR系统的回波探测原理及其测高精度分析 |
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| 引用本文： | 隆华平,胡友健,黎波,冯玉钊.机载LIDAR系统的回波探测原理及其测高精度分析[J].地理空间信息,2007,5(3):75-78. |
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| 作者姓名： | 隆华平 胡友健 黎波 冯玉钊 |
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| 作者单位： | 1. 广州建通测绘技术开发有限公司,广东,广州,513600
2. 中国地质大学,测绘工程系,湖北,武汉,430074 |
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| 摘 要： | 从回波探测的原理和激光测高的计算模型出发,分析了激光测高的误差来源,认为主要影响因子是GPS差分精度、IMU精度和激光测距精度。通过对航高在1000m以下的实际检测数据进行统计分析,得出如下结论:1)单个激光点的精度可以达到15cm,通过地面改正,最优精度可以达到5cm;2)在植被比较密集区域,根据激光点的扫面密度不同,其生成的DEM精度可以达到0.20m～1m。
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| 关 键 词： | LIDAR 回波探测 激光测高 精度分析 |
| 文章编号： | 1672-4623（2007）03-0075-04 |
| 修稿时间： | 2007-03-30 |
Echo Detection Theory of Airbore LIDAR System and Its Precision of Determining Elevation |
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| LONG Huaping,HU Youjian,LI Bo,FENG Yuzhao.Echo Detection Theory of Airbore LIDAR System and Its Precision of Determining Elevation[J].Geospatial Information,2007,5(3):75-78. |
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| Authors: | LONG Huaping HU Youjian LI Bo FENG Yuzhao |
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| Abstract: | Based on the principle and model of determining elevation by echo detection method, the error sources of elevation are analyzed and the LIDAR ranging precision,DGPS precision, IMU precision and echo detection precision is recognized as the main influent factors.By analyzing the test data obtained under the flight height of 1 000 meters, some conclusions are drwan:1)the precision of single laser point can reach 15 cm, while the best precision can be 5 cm after some corrections is made;2)the DEM precision generated in the area where the earth's surface is covered with luxuriant vegetation can reach 0.20 m to 1m. |
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| Keywords: | LIDAR echo detection laser height measurement precision analysis |
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