江苏近岸海域HJ CCD影像悬浮泥沙遥感反演

发布时间：2018-01-08 07:24

本文关键词：江苏近岸海域HJ CCD影像悬浮泥沙遥感反演　出处：《海洋科学》2016年02期 　论文类型：期刊论文

【摘要】：基于2012~2014年期间江苏近岸海域实测遥感反射率、悬浮泥沙浓度及HJ CCD数据,建立该海域HJ CCD影像悬浮泥沙遥感反演模型。通过研究水体实测反射光谱特征,确定对悬浮泥沙浓度变化的敏感波段,并与悬浮泥沙浓度进行函数拟合分析。结果表明:将HJ CCD Band3的等效遥感反射率、HJ CCD Band3与Band2等效遥感反射率的比值分别作为敏感因子,并采用对数函数模拟低值区、指数函数模拟高值区获得的叠加模型表现最为突出。通过卫星应用发现,第2、3波段比值模型的遥感反演结果与实际情况相符,可有效削弱大气校正、表观反射率到遥感反射率的转换方法以及HJ CCD辐射分辨率较低等一系列问题的干扰,为江苏近岸海域HJ CCD悬浮泥沙遥感反演的最优模型。
[Abstract]:Based on the data of remote sensing reflectance, suspended sediment concentration and HJ CCD from 2012 to 2014 in the coastal waters of Jiangsu Province. A remote sensing inversion model of suspended sediment in HJ CCD image of the sea area was established. The sensitive band of suspended sediment concentration was determined by studying the characteristics of reflectance spectrum of water body. The results show that the equivalent remote sensing reflectance of HJ CCD Band3 is obtained. The ratio of the reflectivity of HJ CCD Band3 to Band2 is used as the sensitive factor, and the logarithmic function is used to simulate the low value region. The superposition model obtained by exponential function simulation in high value region is the most outstanding. Through satellite application, it is found that the inversion results of the ratio model of band 2 / 3 are consistent with the actual situation, which can effectively weaken the atmospheric correction. The method of conversion from apparent reflectance to remote sensing reflectivity and the interference of a series of problems such as low resolution of HJ CCD radiation are the best models for remote sensing inversion of HJ CCD suspended sediment in the coastal waters of Jiangsu Province.
【作者单位】：国家海洋环境监测中心海域监管中心;深圳市朗诚科技股份有限公司;大连海事大学环境科学与工程学院;
【基金】：国家海洋公益性行业科研专项经费项目(201205005)~~
【分类号】：P715.7
【正文快照】： 江苏近岸海域由北至南包括海州湾、废黄河口、辐射沙洲与长江口北支口外海域,领海面积3.2×104 km2,国土面积3.25×104 km2,约占全省国土面积的31.6%[1-2]。受长江口径流、苏北浅滩等自然因素的影响,高悬浮泥沙含量成为江苏近岸海域的主要水体特征之一,而其分布、扩散特征对沿

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