ELITE surface longwave upward radiaiton: FY-4A/AGRI hourly 4km all-sky SLUR (2020.10-12)

The <strong>E</strong>ssential therma<strong>L</strong> <strong>I</strong>nfrared remo<strong>T</strong>e s<strong>E</strong>nsing (<strong>ELITE</strong>) product suite currently has four types of products, including land surface temperature (LST: clear-sky and all-sky), emissivity (NBE: narrowband emissivity; BBE: broadband emissivity; and spectral emissivity), the component of surface radiation and energy budget (SLUR: surface longwave upwelling radiation; SLDR: surface longwave downward radiation SLDR; SLNR: surface longwave net radiation), and the component of Earth’s radiation budget (OLR; outgoing longwave radiation; RSR: reflected solar radiation). The spatial-temporal resolutions of the ELITE products are mainly determined by the employed satellite data sources. For more information about ELITE products, please refer to the website (https://elite.bnu.edu.cn). This dataset is the 4km hourly all-sky SLUR product derived by the hybrid method under clear-sky conditions and the machine learning method under cloudy-sky conditions from the FY-4A/AGRI thermal infrared data, covering the AGRI 4km nominal fixed disc (80.6°N-80.6°S, 24.1°E-174.7°W). The in-situ validation results show that the bias (RMSE) of the retrieved AGRI SLUR are -0.67 (18.5) W/m² under clear-sky conditions, 1.05 (23.77) W/m² under cloudy-sky conditions, and -0.26 (19.87) under all-sky conditions, respectively. The temporal resolution and spatial resolution of this dataset are one hour and 4km, respectively. This is the ELITE FY-4A/AGRI all-sky SLUR product from October to December 2020. Please click here to download the ELITE FY-4A/AGRI all-sky SLUR product from July to September 2020. <strong>Dataset Characteristics:</strong> Spatial Coverage: AGRI nominal fixed disc (80.6°N-80.6°S, 24.1°E-174.7°W) Temporal Coverage: 2020 Spatial Resolution: 4 km (subsatellite point) Temporal Resolution: one hour Data Format: NC Scale: 0.01 If you have any questions, please contact Prof. Jie Cheng ([e-mail]).核心热红外遥感（Essential Thermal Infrared Remote Sensing，简称ELITE）产品套件目前包含四类产品：地表温度（Land Surface Temperature，缩写LST，含晴空与全天空条件产品）、发射率（含窄带发射率NBE、宽带发射率BBE与光谱发射率）、地表辐射与能量收支分量（包括地表长波上行辐射SLUR、地表长波下行辐射SLDR、地表长波净辐射SLNR），以及地球辐射收支分量（包括射出长波辐射OLR、反射太阳辐射RSR）。 ELITE产品的时空分辨率主要由所采用的卫星数据源决定。如需了解ELITE产品的更多信息，请访问官网：https://elite.bnu.edu.cn。 本数据集基于FY-4A/AGRI热红外数据构建，晴空条件下采用混合反演方法、多云条件下采用机器学习方法生成4km逐时全天空地表长波上行辐射（SLUR）产品，覆盖AGRI 4km标称固定圆盘区域（80.6°N-80.6°S，24.1°E-174.7°W）。 原位验证结果表明，反演得到的AGRI SLUR在晴空条件下的偏差（均方根误差RMSE）为-0.67（18.5）W/m²，多云条件下为1.05（23.77）W/m²，全天空条件下为-0.26（19.87）W/m²。 本数据集的空间分辨率为4km，时间分辨率为1小时。 本数据集为2020年10月至12月的ELITE FY-4A/AGRI全天空SLUR产品。如需下载2020年7月至9月的ELITE FY-4A/AGRI全天空SLUR产品，请点击此处。 数据集特征： - 空间覆盖范围：AGRI标称固定圆盘区域（80.6°N-80.6°S，24.1°E-174.7°W） - 时间覆盖范围：2020年 - 空间分辨率：4km（星下点） - 时间分辨率：1小时 - 数据格式：NC - 缩放系数：0.01 如有任何疑问，请联系程杰教授（邮箱：[e-mail]）。