CRISTAL ice satellite passes its first solar-array deployment test
Europe’s CRISTAL ice-monitoring satellite has passed its first solar-array deployment test on the ground in Germany. Engineers also checked its connection to the launcher and separation mechanism. The spacecraft is moving toward environmental qualification, with launch targeted for late 2027 or early 2028. Its planned polar measurements remain future mission objectives.
Science··Evening
Mechanisms and software tested together
CRISTAL’s solar arrays opened for the first time during ground testing at Airbus in Friedrichshafen, Germany. The test checked the mechanisms and the software sequence that must work together to extend the satellite’s power-generating wings. Assembly had finished in September; this deployment is a subsequent verification milestone, ahead of the spacecraft’s move into environmental qualification. The October 26 update describes a ground engineering test.[1], [2]
Launcher interface and qualification
Engineers also checked CRISTAL’s fit with the adapter that will attach it to its launcher, working with launch-service provider AVIO. The checks included the mechanism intended to release the satellite after launch. The adapter joins the satellite to its rocket. Its separation interface was checked alongside the deployment mechanisms and software for the solar arrays.[1]
An intermediate qualification review examined equipment, instruments and subsystems before qualification testing of the complete spacecraft. After the remaining work in Friedrichshafen, CRISTAL is due to move to ESA facilities in the Netherlands. Environmental tests there are planned for much of 2027, to assess whether the assembled satellite can withstand launch conditions and operation in space. Launch remains targeted for late 2027 or early 2028.[1]
Polar observations planned after launch
CRISTAL is designed to combine a dual-frequency radar altimeter with a microwave radiometer. The instruments will measure sea ice thickness, the depth of snow above it and ice-sheet elevation. The mission is intended to continue the radar-altimetry record built by earlier missions including CryoSat. A second spacecraft, CRISTAL-B, is planned toward the end of CRISTAL-A’s operating life to support at least two decades of observations. The planned observations also cover coastal and inland waters, ocean topography and information for maritime activities in polar seas. The thickness of sea ice and the depth of snow above it are distinct quantities that the mission is designed to observe together. These are mission plans; no new orbital measurements of polar ice come from the ground deployment test itself.[1]
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