摘要
为评估国产无人机载激光雷达测深系统Mapper-20KU系统性能,利用已有检校场和多波束(MBES)数据,在万宁大洲岛区域开展飞行实验,从测点密度、最大探测深度及测深精度三个方面对系统进行定量分析。结果表明:(1)Mapper-20KU系统在航高70m、飞行速度15m/s条件下,水深测量点密度为27pts/m^(2),最大探测深度为11.454m;(2)通过往返相邻航带数据对比,测深点内符合精度为0.059m;(3)与MBES测深数据相比,测深点外符合精度为0.093m;(4)与检校场数据和陆地RTK数据对比,地形点高程精度为0.078m;(5)与检校场平面检核点对比,地形点平面精度为0.085m。综上,国产Mapper-20KU系统测深精度能满足《海道测量规范》1:2000数据获取要求。
In order to evaluate the performance of the domestic UAV-airborne LiDAR bathymetric system Mapper-20KU,a flight experiment was carried out in the Dazhou Island area of Wanning using the existing calibration field and multibeam echosounder(MBES)data.The system was quantitatively analyzed from three aspects:measurement point density,maximum detection depth and bathymetric accuracy.The results show that:1)At an altitude of 70 m and a flight speed of 15 m/s,the density of the depth measurement points of Mapper-20KU system is 27 pts/m,and the maximum detection depth is 11.454 m.2)By comparing the round-trip data of adjacent flight strips,the internal coincidence accuracy of the depth measurement points is 0.059 m.3)Compared with MBES data,the external accuracy of the bathymetric points is 0.093 m.4)Compared with the calibration field data and land RTK data,the elevation accuracy of the terrain points is 0.078 m.5)In comparison with the plane inspection points of the calibration field,the plane accuracy of the terrain points is 0.085 m.In summary,the bathymetric accuracy of the domestic Mapper-20KU system can meet the 1:2000 data acquisition requirements of the"Specifications for Hydrographic Survey".
作者
俞家勇
许杰
徐广袖
贺岩
买小争
YU Jiayong;XU Jie;XU Guangxiu;HE Yan;MAI Xiaozheng(College of Civil Engineering,Anhui Jianzhu University,Hefei 230601,China;Naval Research Academy,Tianjin 300061,China;Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China;The 7th Topographic Survey Team,State Bureau of Surveying and Mapping Haikou 570203,China)
出处
《海洋测绘》
北大核心
2025年第3期11-15,共5页
Hydrographic Surveying and Charting
基金
国家自然科学基金(42106180)。
