MODIS/Terra+Aqua Land Surface BRF Daily L2G Global 500m and 1km SIN Grid NRT

The MODIS Near Real Time (NRT) Combined Terra and Aqua Multi-Angle Implementation of Atmospheric Correction (MAIAC) Land Surface Bidirectional Reflectance Factor (BRF) gridded Level 2 product (MCD19A1N) produced daily at 500 meter (m) and 1 kilometer (km) pixel resolutions. The MCD19A1N product is corrected for atmospheric gases and aerosols using a new MAIAC algorithm that is based on a time series analysis and a combination of pixel- and image-based processing. The MODIS MAIAC Land Surface BRF products provide an estimate of the surface spectral reflectance as it would be measured at ground-level in the absence of atmospheric scattering or absorption.
The Version 6.1 Level-1B (L1B) products have been improved by undergoing various calibration changes that include: changes to the response-versus-scan angle (RVS) approach that affects reflectance bands for Aqua and Terra MODIS, corrections to adjust for the optical crosstalk in Terra MODIS infrared (IR) bands, and corrections to the Terra MODIS forward look-up table (LUT) update for the period 2012 - 2017. A polarization correction has been applied to the L1B Reflective Solar Bands (RSB).

MODIS近实时（NRT）综合Terra和Aqua多角度大气校正（MAIAC）陆地双向反射率因子（BRF）格网化二级产品（MCD19A1N），该产品以每天一次的频率，以500米（m）和1千米（km）的像素分辨率生成。MCD19A1N产品通过一种基于时间序列分析和像素及图像处理相结合的新MAIAC算法，对大气气体和气溶胶进行了校正。MODIS MAIAC陆地BRF产品提供了在无大气散射或吸收的情况下，地面水平测量的地表光谱反射率的估计。版本6.1的一级B（L1B）产品经过了一系列校准变更的优化，包括对Aqua和Terra MODIS反射率波段响应-扫描角（RVS）方法的变更，以调整Aqua和Terra MODIS的反射率波段；对Terra MODIS红外（IR）波段光学串扰的校正，以及对2012至2017年期间Terra MODIS正向查找表（LUT）更新的校正。对L1B反射太阳波段（RSB）应用了偏振校正。