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License

The satellite products offered by SYKE are covered by the license for open data.


Source entries

The materials are produced by the Finnish Environment Institute's (SYKE) Geoinformatics Systems Group and the Geoinformatics Research Group. Satellite image interpretations are made using several instruments by NASA, NOAA and the EU Copernicus program Sentinel series. Sentinel-2 (ESA), Sentinel-3 (ESA), Landsat-8 (NASA) and TERRA MODIS (NASA) satellite instruments are currently used for observation. The NOAA-AVHRR (NOAA), AQUA / TERRA MODIS (NASA), ENVISAT MERIS (ESA), RADARSAT (CSA) and AMSR-E (NASA) instruments have also been used in the past. The ENVISAT MERIS and Sentinel-2 images have been downloaded from the Copernicus archive servers. Landsat-8 images and some AQUA MODIS images have been downloaded from NASA archives. The Finnish Meteorological Institute has received NOAA-AVHRR and AQUA / TERRA MODIS images.


SYKE must be cited as a source if the products are used in publications or performances or otherwise made available to the public. When utilizing true-color images, the supplier of the original data must also be mentioned.


For example, for true-color images


  • For true color images of Sentinel-2 and Sentinel-3 "Contains modified Copernicus data, SYKE (year/date)",
    • if space use "Contains modified Copernicus Sentinel data, SYKE (year/date)"
  • for Landsat-8 true color images "USGS / NASA Landsat Program, SYKE (year/date)" or
  • for Envisat MERIS true color images: "Original data provided by the European Space Agency, SYKE (year/date)".


For SYKE's water quality data

  • Sentinel-2 based water quality data (surface algal blooms, turbidity, CDOM, Secchi depth): "SYKE data, contains modified Copernicus data (year/date)",
    • if space use: "SYKE data, contains modified Copernicus Sentinel data (year/date)"
  • Landsat-8 based water quality data: "SYKE data, USGS / NASA Landsat Program (year/date)",
  • Sentinel-3 water quality data (surface temperature, surface algal blooms):  "SYKE data, contains modified Copernicus data (year/date)" ,
    • if space use "SYKE data, contains modified Copernicus Sentinel data (year/date)"
  • NOAA AVHRR based water surface temperature,: "SYKE data, original data NOAA AVHRR, SYKE (year/date)" or
  • Envisat MERIS based water quality data: "SYKE data, original data provided by the European Space Agency, SYKE (year/date)".


For references to scientific publications, more information is available from the support service: eotuki (at) syke.fi.

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