2009-2020年全球1km地表反照率逐日产品

数据集包括2009-2020年全球1km每日地表反照率产品。地表反照率包括局地正午时刻太阳角度的短波波段的黑空和白空反照率。数据设为20个波段，前10个波段分别为对应FY波段的窄波段黑空、可见光波段、近红外波段和短波黑空；第11-20个波段分别为对应FY波段的窄波段黑空、可见光波段、近红外波段和短波白空。比例因子 /10000（除以10000，为实际反照率值），填充值32767。产品以FY-3为输入数据，基于多源数据协同反演算法，通过对比引入的传感器观测前后的信息指数判定引入观测的信息状态，同时反演过程中引入了地表BRDF先验知识作为软边界提高反演的稳定性。

This dataset contains global 1-kilometer daily surface albedo products spanning 2009 to 2020. The surface albedo products include both black-sky and white-sky albedo in shortwave bands corresponding to the solar angle at local noon. The dataset consists of 20 spectral bands: the first 10 bands are respectively narrowband black-sky albedo, visible band, near-infrared band and shortwave black-sky albedo matching FY satellite band configurations; bands 11 to 20 are respectively narrowband black-sky albedo, visible band, near-infrared band and shortwave white-sky albedo matching FY satellite band configurations. The scale factor is 1/10000 (divide the stored value by 10000 to obtain the actual albedo value), and the fill value is 32767. This product uses FY-3 satellite data as input, and is developed based on a multi-source data collaborative inversion algorithm. The algorithm judges the information status of the introduced observations by comparing the information indices before and after the sensor observations are introduced. Meanwhile, surface BRDF prior knowledge is introduced as a soft boundary during the inversion process to improve the stability of the inversion results.

搜集汇总

背景与挑战

背景概述

该数据集提供了2009年至2020年全球范围的1公里分辨率逐日地表反照率产品，基于风云卫星数据，采用多源协同反演算法生成，包含短波波段的黑天和白天反照率。产品经过验证，相对精度优于80%，平均均方根误差为0.048，适用于全球变化研究和遥感应用。