ELITE emissivity: FY-4A/AGRI daily 4km BBE (2018)

The Essential thermaL Infrared remoTe sEnsing (ELITE) 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 daily broadband emissivity (BBE) produced from the hourly clear-sky narrowband emissivities (NBE) derived by the iTES algorithm (Liu and Cheng, 2022) 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 bias and RMSE of the retrieved hourly NBE are less than 0.01 and 0.02, respectively, compared with the latest MYD21 LSE. The temporal resolution and spatial resolution of this dataset are daily and 4km, respectively.

This is the ELITE FY-4A/AGRI clear-sky BBE product in 2018. Please click here to download the ELITE BBE product in 2019.

Dataset Characteristics:

• Spatial Coverage: AGRI nominal fixed disc (80.6°N-80.6°S, 24.1°E-174.7°W)
• Temporal Coverage: 2018 (starting from Apr.)
• Spatial Resolution: 4 km (subsatellite point)
• Temporal Resolution: daily
• Data Format: HDF
• Scale: 0.001

Citation (Please cite these papers when using the data):

1. Liu, W., Shi, J., Liang, S., Zhou, S., & Cheng, J. (2022). Simultaneous retrieval of land surface temperature and emissivity from the FengYun-4A advanced geosynchronous radiation imager. International Journal of Digital Earth, 15, 198-225

If you have any questions, please contact Prof. Jie Cheng (eliteqrs@126.com).