A granule covers approximately 25 km across-track and 23 km along-track. For Level-0, Level-1A and Level-1B, granules are sub-images of a detector with a given number of lines along track.
Sentinel meaning registration#
The multi-temporal registration performance of refined products is better than 0.5 pixels.Ī granule is the minimum indivisible partition of a product (containing all possible spectral bands). The geolocation of Level-1C products refined with the GRI is better than 12.5 m CE95 Homologous points found between the GRI and the L1B products within the processing chain, are used to refine the geometric model.Ĭonsequently, the GRI have an absolute geolocation performance which allows respecting the following two specifications: The GRI is used during the Level-1 processing as a source of reference Ground Control Points (GCPs). The GRI is a set of mono-spectral (B4, red channel) L1B Sentinel-2 images acquired globally, which has been processed to provide accurate relative coherence and an improved geolocation. The Copernicus DEM (COP-DEM) is a Digital Surface Model (DSM) which represents the surface of the Earth including buildings, infrastructure and vegetation and is based on the radar satellite data acquired during the TanDEM-X Mission. Since March 2021, the Digital Elevation Model (DEM) used for the orthorectification process of the L1C is the Copernicus DEM GLO-90m. It is expected that the maximum length of a datastrip downlinked to a ground station is approximately 5,000 km. If a particular orbit is acquired by more than one station, a datatake is composed of one or more datastrips. Within a given datatake, a portion of image downlinked during a pass to a given station is termed a "datastrip". The maximum length of an imaging datatake is 15,000 km (continuous observation from northern Russia to southern Africa). The continuous acquisition of an image from one SENTINEL-2 satellite in a given MSI imaging mode is called a "datatake". Precise Orbit Determination (POD) data.International Earth Rotation & Reference Systems service (IERS) data.European Centre for Medium-Range Weather Forecasts (ECMWF): ozone, surface pressure and water vapour data required for Level-1C processing.Digital Elevation Model (DEM) (see below).Ground Image Processing Parameters (GIPP).The auxiliary data required in MultiSpectral Instrument (MSI) data generation are: User Guides - Sentinel-2 MSI - Definitions - Sentinel Onlineĭescribes all auxiliary information that will be used by the Payload Data Ground Segment (PDGS) for the processing of MSI data. Access to Sentinel Data via the Copernicus Data Space Ecosystem.
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