Himawari-8/AHI hourly clear-sky land surface temperature and emissivity dataset (2017.9-2017.12)

This is the clear-sky LST and LSE dataset (0.02°, hourly) derived by the iTES algorithm (Zhou and Cheng, 2020) from the Himawari-8 AHI thermal infrared data. A broadband emissivity (BBE, 8-13.5μm) dataset was also produced using the derived AHI narrowband LSEs (Cheng et al. 2013). The in-situ validation results show that the bias and RMSE of the retrieved AHI LST are 0.19 and 2.93 K in the daytime, and −0.43 and 1.95 K in the nighttime, respectively. The bias and RMSE of the retrieved LSE are less than 0.005 and 0.014, respectively, compared with the latest MYD21 LSE. The time period of this dataset is 2016-2021, covering the AHI 0.02° nominal fixed grid (60°N∼60°S, 80°E∼160°W). This is the LST&amp;E dataset in 2017.09-2017.12 <strong>Dataset Characteristics:</strong> Spatial Coverage: East Asia and Western Pacific regions (60°N∼60°S, 80°E-140°E) Temporal Coverage: 2017.09-2017.12 Spatial Resolution: 0.02 ° Temporal Resolution: one hour Projection: GCS_WGS_1984 Data Format: NetCDF <strong>Citation </strong>(Please cite these papers when using the data)<strong>:</strong> Zhou, S., &amp; Cheng, J. (2020). An Improved Temperature and Emissivity Separation Algorithm for the Advanced Himawari Imager. <em>IEEE Transactions on Geoscience and Remote Sensing, 58</em>, 7105-7124 Cheng, J., et al. (2013). Estimating the Optimal Broadband Emissivity Spectral Range for Calculating Surface Longwave Net Radiation. <em>IEEE Geoscience and Remote Sensing Letters, 10</em>, 401-40 If you have any questions, please contact Prof. Jie Cheng ([e-mail]).本数据集为晴空地表温度（Land Surface Temperature, LST）与地表发射率（Land Surface Emissivity, LSE）数据集，空间分辨率0.02°，时间分辨率为逐小时，由iTES算法（Zhou与Cheng，2020）从向日葵8号（Himawari-8）先进成像仪（Advanced Himawari Imager, AHI）的热红外数据反演得到。研究团队同时基于反演得到的AHI窄带地表发射率，生成了宽波段发射率（Broadband Emissivity, BBE，8~13.5μm）数据集（Cheng等，2013）。 原位验证结果表明，反演得到的AHI地表温度的偏差（bias）与均方根误差（RMSE）在日间分别为0.19 K与2.93 K，夜间则分别为-0.43 K与1.95 K；反演得到的地表发射率与最新的MYD21 LSE产品相比，偏差与均方根误差分别小于0.005与0.014。 该数据集的整体时间跨度为2016—2021年，覆盖AHI 0.02°标称固定网格（60°N~60°S，80°E~160°W）；本数据集为2017年9月至2017年12月的LST与LSE数据集。 <strong>数据集特征：</strong> 空间覆盖范围：东亚与西太平洋区域（60°N~60°S，80°E~140°E） 时间覆盖范围：2017年9月—2017年12月 空间分辨率：0.02° 时间分辨率：逐小时 投影坐标系：GCS_WGS_1984（WGS 1984大地坐标系） 数据格式：NetCDF <strong>引用要求（使用本数据集时请引用以下文献）：</strong> 1. Zhou, S., & Cheng, J. (2020). 面向先进向日葵成像仪的改进型温度与发射率分离算法. 《IEEE地球科学与遥感学报》, 58, 7105-7124 2. Cheng, J. 等(2013). 地表长波净辐射计算用最优宽波段发射率光谱范围估算. 《IEEE地球科学与遥感快报》, 10, 401-40 如有任何疑问，请联系程杰教授（邮箱：[e-mail]）。