ELITE LST: FY-3E/MERSI Clear-Sky LST at Dawn and Dusk Over CONUS

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 provides the FY-3E/MERSI clear-sky LST at dawn and dusk over CONUS from May 2023 to April 2024. It is derived from FY-3E/MERSI 1 km swath data, with each scene containing two outputs: 'LSTE' and 'latlon'.

• LSTE stores the retrieved FY-3E/MERSI LST and LSE, including one LST band and three TIR LSE bands.
• latlon contains two bands representing latitude and longitude for the swath grid.

The dataset is currently provided in MATLAB (.mat) format as the direct output of the retrieval algorithm. A future update will integrate 'LSTE' and 'latlon' into GeoTIFF format.

During validation, a small number of anomalously low values were identified, suggesting that some cloud-contaminated pixels were not effectively filtered by the CLM product. Users are advised to check the LSE values at 11 μm and 12 μm. If both bands have LSE values lower than 0.95, the pixel may be cloud-contaminated.

Dataset Characteristics:

• Spatial Coverage: CONUS
• Temporal Coverage: 2023-05-01 ~ 2024-04-30
• Spatial Resolution: 1 km
• Temporal Resolution: instantaneous
• Data Format: mat
• Scale: 0.01 for LST; 0.0001 for LSE; 1 for latlon
• Offset: 0
• Fill value: 0