ATMOSPHERIC CORRECTION OF HYPERSPECTRAL DATA USING COMBINED EMPIRICAL AND MODEL BASED METHOD
ATMOSPHERIC CORRECTION OF HYPERSPECTRAL DATA USING COMBINED EMPIRICAL AND MODEL BASED METHOD
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使用经验和基于模型相结合的方法对高光谱数据进行大气校正
DOI：
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发表时间：
2011
期刊：
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通讯作者：
T. Lipping
中科院分区：
文献类型：
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作者：
J. Tuominen;T. Lipping
由于大气的复杂性质，大气校正是一个困难的过程，但它应该非常小心地进行，因为它在很大程度上决定了最终数据的可用性。大气校正通常使用经验或基于模型的方法进行。本文提出了一种组合方法。所提出的方法有两个阶段。在第一阶段，使用基于模型的ATCOR 4软件校正高光谱辐射率数据。在第二阶段中，使用经验线（EL）方法校正模型化的反射率数据。该方法的准确性进行了测试，使用伪不变特征（PIF）目标。用ATCOR 4软件计算PIF目标的反射率，平均RMSE误差为6.8%。当使用本文提出的组合方法时，PIF目标的反射率的平均RMSE误差为1.8%。该方法在950- 1100 nm和2300- 2500 nm波长范围内具有较好的检测效果。
Atmospheric correction is a difficult procedure due to the complex nature of the atmosphere and yet it should be done with utmost care because it largely determines the usability of the final data. Atmospheric correction is usually done using either empirical or model based method. In this paper a combined method proposed. The proposed method has two phases. In the first phase hyperspectral radiance data is corrected using the model-based ATCOR 4 software. In the second phase the modelled reflectance data is corrected using Empirical-Line (EL) method. The accuracy of the method was tested using Pseudo Invariant Feature (PIF) targets. The average RMSE error of the PIF targets was 6.8% when the reflectance was derived using ATCOR 4 software. The average RMSE error of the PIF targets was 1.8% when the reflectance was derived using the combined method proposed in this paper. The proposed method produced better results especially in the wavelength regions 950-1100nm and 2300-2500nm.