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首页> 外文会议>Remote sensing of clouds and the atmosphere XVII ; and Lidar technologies, techniques, and measurements for atmospheric remote sensing VIII >The comparison of the darkest pixel and empirical line atmospheric correction methods to retrieve aerosol optical thickness using the radiative transfer equations
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The comparison of the darkest pixel and empirical line atmospheric correction methods to retrieve aerosol optical thickness using the radiative transfer equations

机译：最暗像素和经验线大气校正方法的比较，该方法使用辐射传递方程式获取气溶胶光学厚度

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摘要

This paper presents a comparison of the darkest pixel (DP) and empirical line (EL) atmospheric correction methods in order to examine their effectiveness to retrieve aerosol optical thickness (AOT) using the radiative transfer (RT) equations. Research has found that the DP and the EL methods are the two simplest and most effective methods of atmospheric correction; however, which of the two atmospheric correction methods is more effective in deriving accurate AOT values remains an open question. The accuracy of the DP and EL atmospheric correction methods were examined using pseudo-invariant targets in the urban area of Limassol in Cyprus, by using reflectance values before and after atmospheric correction. Eleven Landsat 5 and Landsat 7 satellite images were atmospherically corrected using both the DP and EL methods. The reflectance values following the DP and EL method of atmospheric correction were used in the radiative transfer equation to derive the AOT values. Following, an accuracy assessment was conducted comparing the in-situ AOT values as measured from sun photometers with the AOT values derived from the RT equations in order to determine the effectiveness of the DP and EL methods for retrieving AOT. The study found that the EL atmospheric correction method provided more accurate AOT values than the DP method.
机译：本文介绍了最暗像素（DP）和经验线（EL）大气校正方法的比较，以便检查它们使用辐射传输（RT）方程检索气溶胶光学厚度（AOT）的有效性。研究发现，DP和EL方法是两种最简单，最有效的大气校正方法。然而，两种大气校正方法中哪一种在得出准确的AOT值方面更有效，这仍然是一个悬而未决的问题。通过使用塞浦路斯大气校正前后的反射率值，使用塞浦路斯塞浦路​​斯利马索尔市区的伪不变目标，检验了DP和EL大气校正方法的准确性。使用DP和EL方法对11个Landsat 5和Landsat 7卫星图像进行了大气校正。遵循DP和EL大气校正法的反射率值用于辐射传递方程，以得出AOT值。接下来，进行了准确性评估，将从太阳光度计测得的原位AOT值与从RT方程得出的AOT值进行比较，以确定DP和EL方法检索AOT的有效性。研究发现，EL大气校正方法比DP方法提供更准确的AOT值。

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