Level 3 data (VGT-S Products)

Synthesis products

The SPOT-VGT Level 3 data (VGT-S products) are available as 1-day (S1) and 10-day (S10) TOC reflectance and NDVI syntheses. VGT S1 products are composed of the ‘best available’ surface reflectance measurements of all segments received during one day over nearly the entire Earth’s surface. This is done for each image covering the same geographical area. High-latitude areas are more frequently observed and thus have more overlapping parts, so for these areas the best observation is selected from multiple observations. The S1 product provides data from all spectral bands (B0, B2, B3, and SWIR), the NDVI, and auxiliary data on image acquisition parameters.

The VGT S10 products are global, 10-day composite images composed from the ‘best available’ SPOT-VGT observations over a ‘dekad’ (10-day period, i.e., from day 1 – 10, 11 – 20, and 21 – end of the month). The products provide TOC reflectance data for all spectral bands (B0, B2, B3, SWIR), the NDVI, and auxiliary data on image acquisition parameters. S10 products are available as separate products for the TOC NDVI and S10 TOC reflectance per spectral band. In addition, users can choose to obtain the global dataset or continental extracts for a number of predefined regions, see Figure 1.

Figure 1: Predefined continental regions for SPOT-VGT S10 data.

Product data access

The SPOT-VGT Level-3 data are available in the User Virtual Machine environment and are searchable using TerraCatalogue search. More information on the data access, file naming conventions, etc. can be found in the SPOT-VGT PUM, Section 7.1.