HJ-1A星HSI数据2级产品处理流程研究

研究了HJ-1A星HSI数据2级产品的数据预处理流程及相关算法,包括绝对辐亮度值转换、条纹去除、大气校正及几何纠正,得到了具有精确地理位置信息的地表光谱反射率图像; 基于相同位置同期的一景Hyperion数据标准化处理流程得到的地表反射率,进行了HSI数据的光谱模拟,并将模拟的地表反射率与真实HSI数据的地表反射率进行...

Research on Standard Preprocessing Flow for HJ-1A HSI Level 2 Data Product

To deal with the Level 2 HSI data from the newly-launched HJ-1A satellite, this paper introduced in details the entire flow and relevant algorithms for data preprocessing. The introduction includes calibration, vertical stripes elimination, and atmospheric correction geometric correction. Standard spectral reflectance products with precise geo-locations were produced. Spectral reflectance data from EO-1 Hyperion of close dates was used to simulate the band reflectance of HJ-1A HSI. Comparisons of spectral reflectance data between simulated and actual HJ-1A HSI were made to validate the effect of the data preprocessing. The average correlation coefficient of spectral reflectance between actual and simulated HJ-1A HSI is 0.947 with its standard deviation being 0.017, suggesting a high consistency. The mean and standard deviation of differential bands between real and simulated HJ-1A HSI are close to 0. The result shows that the reflectance from HJ-1A HSI is consistent with that of simulated data from Hyperion, and hence the data processing flow could provide necessary support for quantitative use of HJ-1A HSI data.