{ "extent": { "spatial": {"bbox": [[ -180, -90, 180, 90 ]]}, "temporal": {"interval": [[ "2009-01-01T00:00:00.000Z", "2009-12-31T23:59:59.999Z" ]]} }, "stac_version": "1.0.0", "sci:doi": "10.5270/EN1-w5xkqmx", "keywords": [ "DIF10", "EARTH SCIENCE>LAND SURFACE", "EARTH SCIENCE>LAND SURFACE>TOPOGRAPHY", "EARTH SCIENCE>OCEANS", "EARTH SCIENCE>ATMOSPHERE", "EARTH SCIENCE>ATMOSPHERE>ATMOSPHERIC WINDS", "EARTH SCIENCE>ATMOSPHERE>PRECIPITATION", "EARTH SCIENCE>ATMOSPHERE>CLOUDS", "ENVISAT", "MERIS", "Orthoimagery", "Land Surface", "Topography", "Oceans", "Atmosphere", "Atmospheric Winds", "Precipitation", "Clouds", "Sun-synchronous", "MERIS FR - 260 m across track / 290 m along track", "800 km", "5 - 1150 km", "Imaging Spectrometers/Radiometers", "PUBLIC", "ESA_open_and_free", "Envisat" ], "created": "2019-05-27T00:00:00.00Z", "description": "The MERIS Level 1 Full Resolution (FR) product contains the Top of Atmosphere (TOA) upwelling spectral radiance measures. The in-band reference irradiances for the 15 MERIS bands are computed by averaging the in-band solar irradiance of each pixel. The in-band solar irradiance of each pixel is computed by integrating the reference solar spectrum with the band-pass of each pixel. The MERIS FR Level 1 product has Sentinel 3-like format starting from the 4th reprocessing data released to users in July 2020. Each measurement and annotation data file is in NetCDF 4. The Level 1 product is composed of 22 data files: 15 files containing radiances at each band (one band per file), accompanied by the associated error estimates, and 7 annotation data files. The 15 sun spectral flux values provided in the instrument data file of the Level 1 products are the in-band reference irradiances adjusted for the Earth-sun distance at the time of measurement. The band-pass of each pixel is derived from on-ground and in-flight characterisation via an instrument model. The values \"Band wavelength\" and \"Bandwidth\" provided in the Manifest file of the Level 1b products are the averaged band-pass of each pixel over the instrument field of view. Auxiliary data are also listed in the Manifest file associated to each product. The Level 1 FR product covers the complete instrument swath. The product duration is not fixed and it can span up to the time interval of the input Level 0 (for a maximum of 20 minutes). Thus the estimated size of the Level 1 FR is dependent on the start/stop time of the acquired segment. During the Envisat mission, acquisition of MERIS Full Resolution data was subject to dedicated planning based on on-demand ordering and coverage of specific areas according to operational recommendations and considerations. 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