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Chercheurs et explorateurs aux prises avec le Pôle Nord pour CryoSat-2

19 avril 2007

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Building a corner reflector on Austfonna

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Corner reflectors are metallic structures that provide a very strong reflection of the radar pulses emitted by ASIRAS. In the CryoVex 2007 campaign, they are used to verify aircraft navigation and investigate the penetration of the radar signal into the snow and ice surface.

Credits: Norwegian Polar Institute (NPI)

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Artist's impression of CryoSat.

The launch of the CryoSat spacecraft unfortunately failed on 8 October 2005 due to a malfunction of its Rockot launcher, which resulted in the loss of the spacecraft. In 2006, ESA received the approval build and launch a CryoSat recovery mission, CryoSat-2.

Credits: ESA - AOES Medialab

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Making snow-depth measurements during the Arctic Arc expedition

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To mark the International Polar Year, Alain Hubert and Dixie Dansercoer are attempting to cross the Arctic from Siberia to southern Greenland – a route never before attempted. Throughout their four-month journey they are taking snow-depth measurements in support of ESA's CryoSat-2 mission.

Credits: Arctic Arc 2007 - International Polar Foundation

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The Hagen ground measurements team, led by Jon Ove Hagen, just before their helicopter airlift from Longyearbyen to the Austfonna ice cap.

Credits: DLR – Irene Hajnsek

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The archipelago of Svalbard, which is about 10 degrees from the North Pole and about 90 minutes by plane from the northern tip of Norway, is one of the main CryoSat-2 validation test areas. The main site is the large Austfonna ice cap at the east of the archipelago where the CryoVex 2007 campaign is taking place.

Credits: DLR – Florian Kugler

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Dornier 228 – the CryoVex 2007 airborne platform

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A photo of the Dornier 228 D-CODE in flight. The rectangle antenna structure of the ASIRAS is visible on the tail of the aircraft. ASIRAS is the airborne version of the radar altimeter instrument carried on CryoSat-2. The aircraft, along with ASIRAS and a laser scanner form the basis for the CryoSat-2 validation activities.

Credits: ESA – Malcolm Davidson

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Illustration of airborne radar altimeter ice cap data

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The image illustrates the airborne ASIRAS data that is being collected over the Austfonna ice cap during the campaign as the aircraft crosses over the summit of the ice cap. The surface contour of the ice sheet is clearly visible and the colours represent the power of the echoes that were scattered from the ground back to the aircraft and the instrument.

Credits: ESA

CryoSat-2 on the road to recovery ESA contribution to International Polar Year 2007-2008 Expédition polaire belge pour Cryosat-2 ESA confirms CryoSat recovery mission Climate Change students help CryoSat-2 Arctic campaign Polar explorer delivers rare snow-depth data to ESA for CryoSat validation

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