【摘要】 机载激光雷达测深系统与传统的舰船海洋声学探测系统相比,具有速度快、覆盖率高、灵活性强等优点。结合中国黄海、东海区域的MODIS产品数据,对当前国际上新型的机载激光雷达测深系统CZMIL的测深性能进行反演分析,旨在为该设备在类似区域的使用提供参考。本文使用中国黄海和东海的水体光学数据,建立了黄海、东海490 nm漫衰减系数与532 nm漫衰减系数之间的经验关系模型。利用2003年MODIS的490 nm漫衰减系数季度平均数据,分析了机载激光雷达系统CZMIL在中国黄海、东海海域的作业能力。结果表明:(1) CZMIL的测深能力受气象条件的影响,主要原因是水体的光学特性在不同的季节呈现不同的特征;(2)CZMIL在中国黄海和东海海域较适宜在夏季进行测量,其测深范围小于75 m。更多还原

【Abstract】 Compared with traditional ocean acoustic detection system,airborne LiDAR sounding system has the advantages of high speed,high coverage and strong flexibility. The inversion analysis of the depth measurement performance of the current international airborne LiDAR sounding system( CZMIL),which also combined MODIS product data,was aimed to provide reference for the use of the equipment in similar areas. According to the Water Optics data measured in the Yellow,East China coastal area,the empirical relationship model between the 490 nm diffuse attenuation coefficient and the 532 nm diffuse attenuation coefficient was built in the corresponding sea area. The measuring ability of the advanced airborne hydrographic LiDAR system was analyzed in the Yellow,East China coastal area based on the quarterly average data of the MODIS 490 nm diffuse attenuation coefficient in 2003. The results showed that:( 1) the sounding ability of CZMIL was influenced by meteorological conditions,and the main reason was that the optical characteristics of the water body presented different characteristics in different seasons;( 2) the summer was the best season for the depth measuring of the airborne hydrographic LiDAR system in the Yellow,East China coastal area,and the range of the depth measuring was within 75 meters.更多还原