| 秋季太湖悬浮物高光谱估算模型 |
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| 引用本文： | 宋庆君,马荣华,唐军武,王晓梅.秋季太湖悬浮物高光谱估算模型[J].湖泊科学,2008,20(2):196-202. |
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| 作者姓名： | 宋庆君 马荣华 唐军武 王晓梅 |
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| 作者单位： | 1. 国家卫星海洋应用中心,北京,100081
2. 中国科学院南京地理与湖泊研究所,南京,210008 |
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| 摘 要： | 2004年10月,在太湖设置67个采样点,现场测量了水体遥感反射比、后向散射系数和辅助参数,实验室分析了水体的悬浮物浓度和水色要素吸收系数.本文在对遥感反射比光谱分析的基础上,比较了几种水体遥感反射比光谱估算悬浮物浓度的方法,结果发现广泛应用的带比值项的算法,虽然可以应用于太湖总悬浮物浓度估算,但是普遍存在相对误差较高的弱点.通过对光谱的分析,确定了750hm单波段算法的参数,并提出了利用近红外812nm波峰高度来估算水体悬浮物的方法.文中还详细阐述了为什么比值算法等在太湖水体悬浮物浓度估算中相对误差比较高,并解释了利用近红外估算精度高的原因,并指明以上算法在遥感应用中的优点和不足,以及现实水体(水质)遥感对现有遥感器配置和遥感算法的需求.
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| 关 键 词： | 遥感反射率 总悬浮物 太湖 |
| 收稿时间： | 2007-09-05 |
| 修稿时间： | 2007-11-06 |
Models of estimated total suspend matter concentration base on hyper-spectrum in Lake Taihu, in autumn |
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| SONG Qingjun,MA Ronghu,TANG Junwu and WANG Xiaomei.Models of estimated total suspend matter concentration base on hyper-spectrum in Lake Taihu, in autumn[J].Journal of Lake Science,2008,20(2):196-202. |
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| Authors: | SONG Qingjun MA Ronghu TANG Junwu and WANG Xiaomei |
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| Institution: | 1:National Satellite Ocean Application Service;Beijing 100081;P.R.China;2:Nanjing Institute of Geography and Limnologyo CAS;Nanjing 210008;PR.China |
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| Abstract: | In situ measurements of remote sensing reflectances(R_(rs)),backscattering coefficients(b_b)as well as other related parameters had been acquired in 67 stations in Lake Taihu,in October,2004.The total suspended matter(TSM)concentrations and absorption coefficients(a)by ocean color elements had been derived from Laboratory analysis.Based on the analysis of in situ R_(rs) spectrum,several methods have been compared for TSM concentrations retrieval from R_(rs)The results show that the methods by means of spect... |
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| Keywords: | Remote sensing reflectance total suspended matter Lake Taihu |
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