IS-SAR

SENTINEL-1

The SENTINEL-1 mission is a constellation of two polar-orbiting satellites, operating day and night performing C-band synthetic aperture radar imaging, enabling them to acquire imagery regardless of the weather. The intensity of the images is prortional to the roughness of the surface. This property, together with the high resolution of the images, makes them a perfect tool for searching for new ice, suitable for Nordic skating on lakes and sea in the Scandinavian countries.

Interpretation

The images can be interpreted in at least two possible ways: ice or open water, depending on factors such as wind strength and local geography. This may seem a large disadvantage but use of the SAR image together with local knowledge and ice observations from Skridskonet will be a huge step forward in finding ice. The scale below can be used as a guidance. However, be prepared to find substantial variations.

Obviously, the thickness or strength of the ice cannot be determined from these images. The strength of the ice must ultimately be judged locally by the experienced skater.

Negative Degree Days

News

2024-03-22

A new map option is availabe with topographic maps over Finland from the National Land Survey of Finland.

2024-02-05

IS-SAR is now back on-line again after an interrupt caused by the previous web hosting service. Let me know if something isn't working properly.

2023-11-09

IS-SAR is on-line again after a brief interrupt caused by a change in the data workflow from Copernicus.

2023-11-03

IS-SAR is indefinitely unavailable due to a significant change in the workflow for the satellite data from ESA. More information will be given in a few days after it is clarified if it is possible to adapt IS-SAR to the new workflow.

2022-08-03

End of mission of the Copernicus Sentinel-1B satellite

2020-11-01

News from ESA regarding satellite data availability.

2018-11-19

Slides from the SSSK Brasafton, 19 November 2018.

2017-11-12

Slides from the Ice conference in Stockholm 11-12 November 2017.

2017-11-09

• A clickable map is available to make it easier to find a map over a specific region.
• It is now possible to overlay a .gpx or .kml track on the images.
• When the link of a map is copied from the browser, the location and zoom is preserved.
• The transparency slider is replaced by +/- buttons.

Images from the last 6 days overlapping a region covering Sweden, Finland and Norway.

New --> Clickable map

Extra Wide swath images (EW)

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Interferometric Wide swath images (IW)

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