首页> 外文期刊>Journal of Marine Science and Engineering >Deriving Bathymetry from Multispectral Remote Sensing Data
【24h】

Deriving Bathymetry from Multispectral Remote Sensing Data

机译:从多光谱遥感数据得出测深法

获取原文
       

摘要

The use of passive satellite sensor data in shallow waters is complicated by the combined atmospheric, water, and bottom signals. Accurate determination of water depth is important for monitoring underwater topography and detection of moved sediments and in support of navigation. A Worldview 2 (WV2) image was used to develop high-resolution bathymetric maps (four meters) that were validated using bathymetry from an active sensor Light Detection and Ranging (LiDAR). The influence of atmospheric corrections in depth retrievals was evaluated using the Dark Substract, Fast Line-of-Sight Atmospheric Analysis of Spectral Hypercubes (FLAASH) and the Cloud Shadow Approach (CSA) atmospheric corrections. The CSA combined with a simple band ratio (Band2/Band3) provided the best performance, where it explained 82% of model values. The WV2 depth model was validated at another site within the image, where it successfully retrieved depth values with a coefficient of determination ( r 2 ) of 0.90 for all the depth values sampled, and an r 2 of 0.70, for a depth range to 20 m. The WV2 bands in the visible region were useful for testing different band combinations to derive bathymetry that, when combined with a robust atmospheric correction, provided depth retrievals even in areas with variable bottom composition and near the limits of detection.
机译:大气,水和海底信号的综合使在浅水中使用无源卫星传感器数据变得复杂。准确确定水深对于监控水下地形和检测移动的沉积物以及支持航行非常重要。 Worldview 2(WV2)图像用于开发高分辨率测深图(四米),该图已使用主动传感器“光探测与测距”(LiDAR)的测深法进行了验证。使用暗消减法,光谱超立方体的快速视线大气分析(FLAASH)和云影法(CSA)大气校正法评估了大气校正在深度检索中的影响。 CSA结合简单的带宽比(Band2 / Band3)提供了最佳性能,可解释82%的模型值。 WV2深度模型在图像中的另一个位置进行了验证,在该位置成功获取了所有采样深度值的确定系数(r 2)为0.90的深度值,对于20到20深度范围的r 2为0.70。米可见区域中的WV2波段可用于测试不同的波段组合以得出测深图,当与强大的大气校正结合使用时,即使在底部成分可变且接近检测极限的区域中,也可提供深度检索。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号