Copernicus Sentinel-2C captures the unexpected: an unique view of the Moon

The newly launched Copernicus Sentinel-2C satellite has captured an image you wouldn't expect – a spectacular view of the Moon.

While the satellite is typically focused on Earth Observation, this image was acquired on 20 September as part of its calibration process. The Moon’s stable and well-known light intensity provides a perfect reference point for fine-tuning the satellite’s sensors. By measuring the Moon's brightness, scientists can detect any small change in the instrument's performance over time.

This calibration process is essential to ensuring 'radiometric accuracy', which is the ability of the satellite to consistently measure the light intensity accurately. Maintaining this accuracy allows Copernicus Sentinel-2C to provide precise and reliable environmental data. 

The Moon’s light helps to detect and correct any gradual sensor drift, keeping the satellite's measurements of Earth’s surface as accurate as possible throughout the mission.