ESA Braves Arctic for Polar Satellite Calibration

The European Space Agency (ESA) is undertaking a critical field campaign in the Arctic to calibrate three upcoming Copernicus satellites: CIMR, CRISTAL, and ROSE-L. These satellites are designed to monitor sea ice decline using distinct but complementary techniques. The Copernicus Expansion Missions Sea Ice Experiment involves an international team of scientists braving harsh Arctic conditions to collect in-situ measurements. This data is essential for validating measurement techniques, assessing instrument performance, and refining retrieval algorithms before the satellites are launched. The field campaign addresses the challenge of accurately measuring sea ice properties like snow depth, salinity, ice thickness, and surface roughness, which are rapidly changing due to the climate crisis. By comparing field observations with airborne measurements and existing satellite data, researchers aim to calibrate sensors, improve data products, and reduce uncertainties. The success of this experiment is vital for ensuring that these upcoming satellites deliver accurate and reliable observations of the polar environment, contributing to a better understanding of climate change impacts. This initiative highlights the importance of field campaigns in bridging the gap between instrument design and operational satellite performance, particularly for complex Earth observation missions. The data gathered will be crucial for informing EU policy priorities and addressing gaps in Copernicus user needs, ultimately expanding the capabilities of the current Sentinel missions.

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