Earth Observation

Why Star Trackers On-Board the CryoSat Satellite?

Three fully autonomous Terma HE-5AS Star Trackers provide the precise pointing knowledge required for the main instrument, the SIRAL interferometer, on-board the CryoSat satellite. All three Star Trackers are mounted directly on the payload antenna bench of the CryoSat satellite for optimized structural stability between the star sensors and the payload sensors measuring frames.

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Projected future climate in the Arctic

The Intergovernmental Panel on Climate Change (IPCC) concluded in 2001 that man-made emissions of so-called “greenhouse gases” most likely are leading to global warming, and that the temperature incrase probably will be at maximum at high northern latitudes.

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Norwegian Space Centre and the ENVISAT-programme

As a member of the European Space Agency, ESA, the Norwegian Space Centre started potential participant activities in the ENVISAT-programme in 1991. On behalf of Norway the ENVISAT declaration was signed in 1992. The Norwegian Space Centre has worked with the ENVISAT programme for more than ten years, and Norway has through the Norwegian Space Centre paid approx. 200 MNOK for the participation in the ENVISAT programme since the start.

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ENVISAT preparations at the Norwegian Defence Research Establishment

Space-based maritime monitoring and surveillance has been a focus area for the Norwegian Defence Research Establishment (FFI) for over a decade. Throughout the ERS and RADARSAT-1 era, FFI has performed applied research that helped establish today’s operational services for radar satellite-based oil spill and fisheries monitoring in Norway.

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Two ENVISAT projects related to Nordic applications, sea ice and boreal forest

Microwaves, not sensitive to cloud cover or sun illumination, are important for remote sensing at Nordic latitudes. The Arctic ice cover and the boreal forests are extensive areas important for the living conditions and sensitive to climate changes at these latitudes. ENVISAT offers new possibilities to detect and follow possible changes e.g. due to the greenhouse effect.

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