Abstract

An algorithm is considered for retrieving the reflection coefficients of the Earth’s surface taking into account radiation polarization. The algorithm was tested for five MODIS channels in three areas: south of Tomsk region, Moscow region, and Irkutsk region. Test points at the center of coniferous forest massifs in the summer season were used to estimate the error of the algorithm. Results from our algorithm with and without accounting for polarization, from the MOD09 algorithm, and results without atmospheric correction were compared with measurements taken as reference. The comparison shows that the average values obtained by our algorithm taking into account polarization are closer to the reference data than those obtained using the MOD09 NASA algorithm in MODIS channels 1 (0.620–0.670 μm), 3 (0.459–0.479 μm), and 4 (0.545–0.565 μm), and the difference on the same order of magnitude is observed in MODIS channel 2 (0.841–0.876 μm). In MODIS channel 8 (0.405–0.420 μm), one algorithm is preferable in some situations and the other otherwise.

中文翻译：

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考虑辐射极化的MODIS卫星测量反演地表反射系数

摘要

考虑了一种考虑辐射极化来获取地球表面反射系数的算法。该算法已在以下三个地区的五个MODIS通道上进行了测试：托木斯克州以南，莫斯科地区和伊尔库茨克州。夏季针叶林地块中心的测试点被用来估计算法的误差。将我们的算法的结果（包括和不考虑极化），MOD09算法的结果以及未经大气校正的结果与作为参考的测量结果进行了比较。比较结果表明，在MODIS通道1（0.620-0.670μm），3（0.459-0.479μm）和4的MODIS通道中，我们的算法考虑到极化的平均值比使用MOD09 NASA算法获得的平均值更接近参考数据。 （0.545–0.565μm），在MODIS通道2（0.841–0.876μm）中观察到了相同数量级的差异。在MODIS通道8（0.405–0.420μm）中，一种算法在某些情况下是可取的，其他情况下则更可取。