ADAM Surface Reflectance Database v4.0
type: Dataset
keyword: DIF10
keyword: EARTH SCIENCE>LAND SURFACE>SURFACE RADIATIVE PROPERTIES
keyword: Terra
keyword: Aqua
keyword: QUIKSCAT
keyword: OrbView-2
keyword: MODIS
keyword: SEAWINDS
keyword: SeaWiFS
keyword: Orthoimagery
keyword: Surface Radiative Properties
keyword: UV (0.01 - 0.4) µm
keyword: VIS (0.40 - 0.75) µm
keyword: NIR (0.75 - 1.30) µm
keyword: SWIR (1.3 - 3.0) µm
keyword: MWIR (3.0 - 6.0) µm
keyword: 4.0
keyword: Very Low Resolution - VLR (> 1200) m
keyword: Imaging Spectrometers/Radiometers
keyword: Scatterometers
keyword: RESTRICTED
keyword: ESA_open_and_free
keyword: TERRA
keyword: AQUA
keyword: QuikSCAT
keyword: SeaWinds
spatial: Location
  bbox: POLYGON((-180 -90,-180 90,180 90,180 -90,-180 -90))
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description: ADAM enables generating typical monthly variations of the global Earth surface reflectance at 0.1° spatial resolution (Plate Carree projection) and over the spectral range 240-4000nm. The ADAM product is made of gridded monthly mean climatologies over land and ocean surfaces, and of a companion API toolkit that enables the calculation of hyperspectral (at 1 nm resolution over the whole 240-4000 nm spectral range) and multidirectional reflectances (i.e. in any illumination/viewing geometry) depending on user choices. The ADAM climatologies that feed the ADAM calculation tools are: For ocean: monthly chlorophyll concentration derived from SeaWiFS-OrbView-2 (1999-2009); it is used to compute the water column reflectance (which shows large spectral variations in the visible, but is insignificant in the near and mid infrared). monthly wind speed derived from SeaWinds-QuikSCAT-(1999-2009); it is used to calculate the ocean glint reflectance. For land: monthly normalized surface reflectances in the 7 MODIS narrow spectral bands derived from FondsdeSol processing chain of MOD09A1 products (derived from Aqua and Terra observations), on which relies the modelling of the hyperspectral/multidirectional surface (soil/vegetation/snow) reflectance. uncertainty variance-covariance matrix for the 7 spectral bands associated to the normalized surface reflectance. For sea-ice: Sea ice pixels (masked in the original MOD09A1 products) have been accounted for by a gap-filling approach relying on the spatial-temporal distribution of sea ice coverage provided by the CryoClim climatology for year 2005.
qualified attribution: Attribution
  agent: Organization
    has name: ESA/ESRIN
    has URL: http://www.esa.int
temporal: PeriodOfTime
  start date: 2005-01-01T00:00:00.000Z
  end date: 2005-12-31T23:59:59.999Z
license: other