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Satellite observations of sea ice concentration in the Arctic and the Antarctic are the backbone of www.meereisportal.de since its launch in April 2013. Since then, daily maps and data sets are published on the information and data portal. Time series and trends are updated daily, representing the status of the sea ice cover on hemispheres. meereisportal.de/seaiceportal.de was laid out as an open portal and shall serve scientific groups performing research on sea ice as a platform for communicating the results of their research.
The EPN (or EUREF Permanent Network) is a voluntary organization of several European agencies and universities that pool resources and permanent GNSS station data to generate precise GNSS products. The EPN has been created under the umbrella of the International Association Geodesy and more precisely by its sub-commission EUREF. The European Terrestrial Reference System 89 (ETRS89) is used as the standard precise GPS coordinate system throughout Europe. Supported by EuroGeographics and endorsed by the EU, this reference system forms the backbone for all geographic and geodynamic projects on the European territory both on a national as on an international level.