【摘要】 卫星观测数据质量是遥感应用的前提,传统的场地定标、交叉定标、稳定目标定标等都只能反映限定观测条件下的卫星数据质量。为了更全面的评估反射波段的观测数据质量,本文提出了一种基于6SV矢量辐射传输模式的全球洋面目标卫星观测模拟,以及基于双差分析的卫星观测质量分析方法,并将该方法应用于FY-3B MERSI,发现FY-3B MERSI可见光波段相对于Aqua MODIS存在系统性偏差和与扫描角相关的偏差特征(主要由偏振影响所致)。相对于传统的定标检验方法,该方法可以提供各种观测几何条件下的全球分析样本,可以发现卫星数据在空间分布、扫描、偏振依赖等方面的质量缺陷。更多还原

【Abstract】 The satellite data quality is one of the prerequisites of successful quantitative remote sensing applications. Using traditional methods, such as site calibration, cross calibration, stable target calibration, the radiometric quality of satellite data can only be reflected under limited conditions. In order to evaluate the data quality of reflective solar band more comprehensively, a data quality evaluation method based on the top-of-the-atmosphere earth observation simulation over global ocean using the 6 SV radiative transfer model and double difference analysis is proposed. The method is applied to FY-3 B MERSI and the radiometric error characteristics relative to MODIS are obtained, including certain systematic bias and patterns related with scan agles mainly caused by polarization effect. Compared with the traditional calibration and validation methods, this method can provide global samples covering various geometries, and reveal the quality defects in spatial distribution, scanning and polarization dependence.更多还原