Landsat 8 Land Surface Reflectance (LSR) products are released on CASEarth Databank platform by Aerospace Information Research Institute, Chinese Academy of Sciences.

LSR products are generated by the LSR retrieval procedure (AirSR) and the Landsat 8 images received by the remote sensing satellite ground station of China. AirSR adopts a pixel by pixel atmospheric correction method based on the 6S radiative transfer model and MODIS AOD (Aerosol Optical Depth) spatial fusion. The MODIS AOD products used include MOD08D3, MOD09CMA, and MCD19A2, which are spatially fused using the Universal Kriging Method (UK) to obtain a complete coverage of AOD data. The required atmospheric water vapor content and ozone data are from MCD19A2 and MOD09CMG products, which can be downloaded from the MODIS product website (https://ladsweb.modaps.eosdis.nasa.gov/archive/allData/). AirSR also considers the influences of solar zenith angle and satellite observation zenith angle. For detailed information on the Landsat 8 land surface reflectance product, please refer to the Landsat 8 land surface reflectance product manual.

(1) Temporal coverage of the product

Basically consistent with the Landsat-8 data received and archived by remote sensing satellite ground station of China, from April 2013 to present. However, when the solar zenith angle of the data is larger than 76 degree, AirSR does not produce land surface reflectance products for that data.

(2) Atmospheric correction is not performed for Landsat 8 panchromatic band (Band 8).

(3) The Landsat 8 land surface reflectance product inherits all the features of the Landsat 8 ortho-rectified product, including sensors, band information, central wavelength, spatial resolution, geometric correction method, and geometric correction accuracy. Please refer to the parameter introduction of Landsat 8 on the USGS website for details.

(4) The geometric accuracy of the Landsat 8 land surface reflectance product inherits the geometric accuracy of the Landsat 8 ortho-rectified product, which is consistent with the geometric accuracy of the Landsat 8 Collection 2 Level-1 data released by USGS. Radiometric accuracy validation of the Landsat 8 land surface reflectance products was conducted using field measured spectral data, as detailed in the Landsat 8 land surface reflectance/land surface temperature product manual.

        (5) Landsat 8 Land Surface Reflectance products can be freely downloaded from the CASEarth Databank platform.