Sentinel-2 explores night vision
Sentinel-2 Explores Night Vision: A New Frontier for Earth Observation
After more than a decade in orbit, the European Space Agency's (ESA) Copernicus Sentinel-2 mission has been pushing the boundaries of what is possible in Earth observation. The first Sentinel-2 satellite, Sentinel-2A, was launched in 2015, marking a major milestone in the development of high-resolution multispectral optical imagers. Since then, the mission has delivered a wealth of data for Copernicus operational services, the commercial sector, and for science. However, the Sentinel-2 mission is not just about delivering data; it's about exploring new frontiers and pushing the boundaries of what is possible.
Colour Vision for Copernicus
The Sentinel-2 mission is based on two identical satellites in the same orbit, 180° apart for optimal coverage and data delivery. Sentinel-2B was launched in 2017, and Sentinel-2C followed in 2024 to replace Sentinel-2A. The satellites all carry a 13-band multispectral imager, which, like a camera, relies on light to capture images. However, the satellites experience darkness during night-time passes, and under normal operations, the imagers are switched off when the satellites pass over night-shrouded parts of the planet.
Wildfire in India Imaged by Sentinel-2A at Night
In recent trials, the ESA has been experimenting with switching on Sentinel-2A at night to see how it would perform in the dark. The results have been strikingly positive, offering encouraging news for the follow-on Copernicus Sentinel-2 Next Generation mission, currently in development. The test images show that Sentinel-2A was able to capture images of a wildfire in India, gas flares from oil production in the Middle East, and fishing boats off the coast of South Korea – all during the night-time.
Fishing Boats off South Korea Imaged by Sentinel-2A at Night
The Sentinel-2 Next Generation mission is being developed with the ambitious goal of delivering even higher resolution imagery and imaging some parts of the planet even when the Sun is down. The current Sentinel-2 mission remains outstanding, delivering a wealth of data for Copernicus operational services, the commercial sector, and for science. However, the Sentinel-2 Next Generation mission will contribute a significant amount of useful information to the community, including night-time imagery, which is extremely useful for security and for monitoring city lights, which are an indication of urban growth.
Gas Flares in Iraq Imaged by Sentinel-2A
The Sentinel-2 Next Generation mission will be able to capture images of gas flares from oil production in the Middle East, which are of course pretty bright, but also more subtle characteristics such as a wildfire in India and fishing boats off the coast of South Korea – all during the night-time. The current Sentinel-2 mission remains outstanding, delivering a wealth of data for Copernicus operational services, the commercial sector, and for science. However, the Sentinel-2 Next Generation mission will be able to capture images of gas flares in Iraq, which are an important indicator of oil production.
Sentinel-2A Night Imaging Campaign
The Sentinel-2A night imaging campaign was carefully prepared by the mission teams, and it has naturally put strain on the Sentinel-2A satellite, but it has been well worth exploring what this ageing satellite can do to help prepare for the future. Switching on the satellite to image at night required a great deal of energy, but Sentinel-2A did very well. Even after 10 years in orbit and this demanding experiment, the satellite is still in remarkably good health and continues to deliver a wealth of data to many users that benefit from the satellite for a wide range of everyday applications.
Gas Flares in Qatar Imaged by Sentinel-2A
The Sentinel-2 Next Generation mission will be able to capture images of gas flares in Qatar, which are an important indicator of oil production. The current Sentinel-2 mission remains outstanding, delivering a wealth of data for Copernicus operational services, the commercial sector, and for science. However, the Sentinel-2 Next Generation mission will be able to capture images of gas flares in Qatar, which are an important indicator of oil production.
Conclusion
The Sentinel-2 mission has been pushing the boundaries of what is possible in Earth observation for over a decade. The Sentinel-2 Next Generation mission will be able to capture images of gas flares in Qatar, which are an important indicator of oil production. The current Sentinel-2 mission remains outstanding, delivering a wealth of data for Copernicus operational services, the commercial sector, and for science. However, the Sentinel-2 Next Generation mission will be able to capture images of gas flares in Qatar, which are an important indicator of oil production. The Sentinel-2 Next Generation mission will be able to capture images of gas flares in Qatar, which are an important indicator of oil production.
