MOD09GA 500M地表反射率每日产品

Modis表面反射率产品是表面波谱反射估计，低级数据产品进行了大气和气溶胶的校正，并在此基础上进一步处理产生了L2基础数据产品以及L2G（栅格化2 级产品）和L3数据产品。 MOD09Q1提供了1-2波段250米8天合成的栅格化3级数据产品（L3），投影为正弦曲线投影，每一个MOD09Q1象元包含了8天之内最有可能的L2G观测数值，尽量考虑高观测覆盖、低视角、无云及云的阴影以及气溶胶浓度的影响。此科学数据集提供的产品包括1-2波段反射率值和质量评价数据。The MODIS surface reflectance products are estimates of surface spectral reflectance. Low-level data products have been corrected for atmospheric and aerosol effects, based on which further processing generates L2 basic data products, L2G (gridded Level 2 product), and L3 data products. MOD09Q1 provides 250-meter 8-day composite gridded Level 3 data products (L3) for bands 1 and 2, using the Sinusoidal projection. Each MOD09Q1 pixel contains the most probable L2G observation values within an 8-day period, prioritizing high observation coverage, low view angles, cloud-free conditions, cloud shadows, and the impact of aerosol concentrations. The products provided by this scientific dataset include reflectance values for bands 1 and 2, as well as quality assessment data.

搜集汇总

背景与挑战

背景概述

MOD09GA是一个500米空间分辨率的每日地表反射率产品，由NASA提供，经过大气和气溶胶校正，属于MODIS陆地标准产品。该数据集包含1-2波段的反射率值和质量评价数据，采用正弦曲线投影，以HDF格式存储，总容量为1.6 TB，适用于地表监测和环境研究。