全波形星载激光测距误差抑制的滑动窗口高斯拟合算法
星载激光测距精度是影响激光测高仪几何检校与处理精度的主要来源之一。针对由全波形星载激光模拟信号经数字化处理后的量化误差带来的激光测距提取精度不高、稳定性低的问题，本文提出一种全波形星载激光测距误差抑制的滑动窗口高斯拟合算法。该方法利用滑动窗口剔除波峰附近似噪声点，并基于高斯曲线拟合优化波形峰值，从而精化激光测距值。然后以高分七号国产星载激光测高仪为试验对象，利用冰面、内陆湖面和平坦陆地地表进行激光高程相对和绝对精度对比验证。结果表明，相对于一般峰值方法，本文算法使得激光测距精度提升了7.5 cm；基于本文方法提取的测距值，计算的激光高程相对精度提升4.2 cm；利用机载LiDAR点云数据验证，...
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| Published in | Ce hui xue bao Vol. 50; no. 9; pp. 1240 - 1250 |
|---|---|
| Main Authors | , |
| Format | Journal Article |
| Language | Chinese English |
| Published |
Beijing
Surveying and Mapping Press
01.09.2021
自然资源部国土卫星遥感应用中心,北京 100048 河海大学地球科学与工程学院,江苏南京211100 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-1595 1001-1595 |
| DOI | 10.11947/j.AGCS.2021.20200466 |
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| Abstract | 星载激光测距精度是影响激光测高仪几何检校与处理精度的主要来源之一。针对由全波形星载激光模拟信号经数字化处理后的量化误差带来的激光测距提取精度不高、稳定性低的问题，本文提出一种全波形星载激光测距误差抑制的滑动窗口高斯拟合算法。该方法利用滑动窗口剔除波峰附近似噪声点，并基于高斯曲线拟合优化波形峰值，从而精化激光测距值。然后以高分七号国产星载激光测高仪为试验对象，利用冰面、内陆湖面和平坦陆地地表进行激光高程相对和绝对精度对比验证。结果表明，相对于一般峰值方法，本文算法使得激光测距精度提升了7.5 cm；基于本文方法提取的测距值，计算的激光高程相对精度提升4.2 cm；利用机载LiDAR点云数据验证，高程绝对精度提升了4.5 cm；充分说明本文方法可作为有效减少星载激光测距随机误差的一种方法，为高分七号卫星亚米级高程测量精度处理提供了不可或缺的基础。 |
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| AbstractList | 星载激光测距精度是影响激光测高仪几何检校与处理精度的主要来源之一。针对由全波形星载激光模拟信号经数字化处理后的量化误差带来的激光测距提取精度不高、稳定性低的问题，本文提出一种全波形星载激光测距误差抑制的滑动窗口高斯拟合算法。该方法利用滑动窗口剔除波峰附近似噪声点，并基于高斯曲线拟合优化波形峰值，从而精化激光测距值。然后以高分七号国产星载激光测高仪为试验对象，利用冰面、内陆湖面和平坦陆地地表进行激光高程相对和绝对精度对比验证。结果表明，相对于一般峰值方法，本文算法使得激光测距精度提升了7.5 cm；基于本文方法提取的测距值，计算的激光高程相对精度提升4.2 cm；利用机载LiDAR点云数据验证，高程绝对精度提升了4.5 cm；充分说明本文方法可作为有效减少星载激光测距随机误差的一种方法，为高分七号卫星亚米级高程测量精度处理提供了不可或缺的基础。 P236; 星载激光测距精度是影响激光测高仪几何检校与处理精度的主要来源之一.针对由全波形星载激光模拟信号经数字化处理后的量化误差带来的激光测距提取精度不高、稳定性低的问题,本文提出一种全波形星载激光测距误差抑制的滑动窗口高斯拟合算法.该方法利用滑动窗口剔除波峰附近似噪声点,并基于高斯曲线拟合优化波形峰值,从而精化激光测距值.然后以高分七号国产星载激光测高仪为试验对象,利用冰面、内陆湖面和平坦陆地地表进行激光高程相对和绝对精度对比验证.结果表明,相对于一般峰值方法,本文算法使得激光测距精度提升了7.5 cm;基于本文方法提取的测距值,计算的激光高程相对精度提升4.2 cm;利用机载LiDAR点云数据验证,高程绝对精度提升了4.5 cm;充分说明本文方法可作为有效减少星载激光测距随机误差的一种方法,为高分七号卫星亚米级高程测量精度处理提供了不可或缺的基础. |
| Author | 谢俊峰 刘仁 |
| AuthorAffiliation | 自然资源部国土卫星遥感应用中心,北京 100048;河海大学地球科学与工程学院,江苏南京211100 |
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| Author_FL | XIE Junfeng LIU Ren |
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| Copyright | Sep 2021. This work is published under https://creativecommons.org/licenses/by-nc-nd/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. Copyright © Wanfang Data Co. Ltd. All Rights Reserved. |
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| Keywords | 星载全波形激光;测距精度;一般峰值法;滑动窗口;相对精度;绝对精度 |
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| Publisher | Surveying and Mapping Press 自然资源部国土卫星遥感应用中心,北京 100048 河海大学地球科学与工程学院,江苏南京211100 |
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| SubjectTerms | Accuracy Airborne lasers Algorithms Altimetry Geometric accuracy Laser altimeters Laser ranging Lasers Lidar Random errors Signal processing Sliding Spaceborne lasers Waveforms |
| Title | 全波形星载激光测距误差抑制的滑动窗口高斯拟合算法 |
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