Vegetation Earth system data record from DSCOVR EPIC observations: new parameters in version 2 VESDR product
Files
First author draft
Date
2021-12-14
DOI
Authors
Knjazihhin, Yuri
Myneni, Ranga B.
Version
First author draft
OA Version
Citation
J. Knjazihhin, R. Myneni. 2021. "Vegetation Earth System Data Record from DSCOVR EPIC Observations: New Parameters in Version 2 VESDR Product."
AGU Fall Meeting. New Orleans, LA & Online, December 13-17, 2021. Poster ID: A25F-1742.
Abstract
The NASA's Earth Polychromatic Imaging Camera (EPIC) onboard NOAA's Deep Space Climate Observatory (DSCOVR) mission was launched on February 11, 2015 to the Sun-Earth Lagrangian L1 point where it began to collect radiance data of
the entire sunlit Earth every 65 to 110 min in June 2015. It provides imageries in near backscattering directions at ten ultraviolet to near infrared narrow spectral bands. The DSCOVR EPIC science product suite includes vegetation Earth System Data Record
(VESDR). The first version of the product provided leaf area index (LAI) and diurnal courses of normalized difference vegetation index (NDVI), sunlit LAI (SLAI), fraction of incident photosynthetically active radiation (FPAR) and directional area scattering
function (DASF). Five new parameters have been developed and added in Version 2 VESDR product: Earth Reflector Type Index (ERTI) and Canopy Scattering Coefficient (CSC) at 443 nm, 551 nm, 680 nm and 779 nm. The parameters are at 10 km regional
sinusoidal grids and 65 to 110 minute temporal frequency generated from the upstream DSCOVR EPIC BRF product and available from the NASA Langley Atmospheric Science Data Center. This poster provides an overview of the EPIC VESDR research. This
includes a description of the VESDR product, its initial quality assessment, showcasing the value of the product for monitoring changes of the equatorial forests and obtaining new parameters from on canopy structure from the VESDR parameters.