EARTH SCIENCE>LAND SURFACE>LAND USE/LAND COVER
GCOM-C/SGLI L2 Vegetation Indices dataset is obtained from the SGLI sensor onboard GCOM-C produced by the Japan Aerospace Exploration Agency (JAXA). The product is the vegetation indices and shadow index. GCOM-C is sun-synchronous sub-recurrent orbit satellite launched on December 23, 2017 and conducts long-term global observations of geophysical variables related to the global climate system across 28 items including aerosol and vegetation over 4 areas of atmosphere, land, ocean, and cryosphere. The data will be used to contribute to higher accuracy of global warming prediction. The SGLI has swath of 1150 km in the visible band and 1400 km in the infrared band. Level 2 products are defined to be granule scene and global (tile) data of physical quantity derived from Level-1B or Level-2 products and ancillary data such as meteorological data and various additional data related to the physical quantity.This dataset includes Enhanced Vegetation Index (EVI), Normalized Defferemce Difference Vegetation Index (NDVI), Shadow Index (SDI), and quality flag (QA_flag). NDVI is a simple normalized index that can be used to indicate the activity of vegetation making use of the reflectance at red and near-infrared wavelengths where the reflectance of vegetation exhibits a steep increase like a step function. The physical quantity is dimensionless. EVI is an improved version of vegetation indices designed to enhance the vegetation signal in high density vegetation area. The physical quantity is dimensionless. SDI is the fraction of shadow generated by conformation of vegetation (shadow area proportion within a pixel) and is estimated from SW03 surface reflectance. SDI reflects the canopy shape and density. The physical quantity is dimensionless. The QA_flag shows flag of quality and observation condition. The provided format is HDF5. The Spatial resolution is 250 m. The projection method is EQA. The data projection type is "Tile". The current version of the product is Version 3. The Version 2 is also available.
JP/JAXA/SAOC