Solar radiation enters the Earth's atmosphere with a portion being scattered by clouds and aerosols.

Processing, archiving and distributing Earth science data
at the NASA Langley Research Center



The Vegetation Earth System Data Record (VESDR) provides Leaf Area Index (LAI) and diurnal courses of Normalized Difference Vegetation Index (NDVI), Sunlit Leaf Area Index (SLAI), Fraction of incident Photosynthetically Active Radiation (400-700 nm) absorbed by the vegetation (FPAR) and Directional Area Scattering Function (DASF). The parameters at 10 km sinusoidal grid and 65 to 110 minute temporal frequency are generated from the upstream DSCOVR EPIC L2 MAIAC (version 01) surface reflectance product. 


FPAR, LAI, SLAI are useful for monitoring variability and change in global vegetation due to climate and anthropogenic influences, modeling climate, carbon and water cycles, and improving forecasting of near surface weather. DASF provides information critical to accounting for structural contributions to measurements of leaf biochemistry from remote sensing. Whereas LAI is a standard product of many satellite missions, diurnal courses of global FPAR, NDVI, SLAI and DASF are new satellite derived products.


We also provide two ancillary science data products. They are 10 km SIN Grid Land Cover Typeand Distribution of Land Cover Types within 10 km pixel. These products were derived from 500m MODIS land cover type 3 product (MCDLCHKM), which was generated from 2008, 2009 and 2010 land cover products (MCD12Q1, v051). Ancillary science data products can be downloaded from the tab "Read Software".


Project Title: 
Deep Space Climate Observatory
CCD Manager
Spatial Coverage: 

(-90, 90)(-180,180)

Spatial Resolution: 

10 km SIN grid

Temporal Coverage: 

06/13/2015 - present

Temporal Resolution: 
Temporal Resolution: 

65 - 110 minutes

File Format: 

Earthdata Search: Order Data


Click here for more information on citing ASDC data.

Directional Area Scattering Function
Fraction of incident PAR absorbed by the vegetation
Leaf Area Index
Normalized Difference Vegetation Index
Sunlit Leaf Area Index
Readme Files