MODIS/Terra+Aqua BRDF Model Parameters Daily NRT L3 Global 1km SIN Grid

The MODIS Near Real Time (NRT) Combined Terra and Aqua combined Multi-Angle Implementation of Atmospheric Correction (MAIAC) Bidirectional Reflectance Distribution Function (BRDF) Model Parameters gridded Level 3 product (MCD19A3DN) produced daily at 1 kilometer (km) pixel resolutions. The MCD19A3DN product provides three coefficients (weights) of the RossThick/Li-Sparse (RTLS) BRDF model that can be used to describe the anisotropy of each pixel. The retrievals represent cloud-free and low aerosol conditions.

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）双向反射分布函数（BRDF）模型参数栅格化三级产品（MCD19A3DN），该产品以每日1千米（km）像素分辨率生成。MCD19A3DN产品提供了RossThick/Li-Sparse（RTLS）BRDF模型的三个系数（权重），可用于描述每个像素的各向异性。这些反演数据代表无云和低气溶胶条件。
版本6.1的一级B（L1B）产品通过经历各种校准变更而得到改进，包括：响应-扫描角（RVS）方法的变更，该变更影响Aqua和Terra MODIS的反射率波段；对Terra MODIS红外（IR）波段中光学串扰的校正；以及针对2012-2017期间Terra MODIS正向查找表（LUT）更新的校正。对一级B反射太阳波段（RSB）应用了偏振校正。