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Credit: European Union, Copernicus Sentinel-2 imagery

Sentinel-2: Europe’s Eye on the Planet

Sentinel-2: Europe’s Eye on the Planet

The Sentinel-2 program stands as a central pillar of global environmental monitoring. Developed by the European Space Agency (ESA) within the Copernicus program, this mission provides an unprecedented view of Earth’s changing landscapes. Operating under an open-access policy, these data are freely available to everyone, as the various missions of the Copernicus program publish new satellite imagery and environmental data every single day.

A constellation of four satellites (units A, B, C, and soon D) comprises the Sentinel-2 mission. This structure ensures a constant data flow, which is essential for the analysis of current environmental challenges.

 

What are the key operational applications for Sentinel-2 ?

 

Precise Land Use Monitoring

A primary objective of Sentinel-2 involves the accurate mapping of land exploitation and its transformation over time.

Credit: European Union, Copernicus Sentinel-2 imagery Copernicus Sentinel-2 imagery of Rosario, Argentina, illustrates the visible impact of severe drought on one of South America's most productive agricultural regions through a direct comparison of crop health between March 2025 and March 2026.

 

  • Agricultural Revolution: The Normalized Difference Vegetation Index (NDVI) facilitates crop yield forecasts. This tool helps farmers track crop health and optimize fertilizer application.

In Argentina, Sentinel-2 imagery of Rosario (2025–2026) reveals the critical impact of drought on one of the world’s most productive agricultural regions. Using the NDVI index, Argentinian farmers can pinpoint water stress to optimize fertilizer application and halt spending on non-viable crops.

Credit: European Union, Copernicus Sentinel-2 imagery

Despite its ecological importance, Stung Treng province in Cambodia is facing rapid deforestation, a global issue now being monitored by the EU Observatory using Copernicus Sentinel-2 satellite data to support conservation efforts.

 

  • Forestry Oversight: The mission enables the detection of illegal deforestation at its earliest signs. It also monitors forest regeneration and the preservation of biodiversity.

Despite its ecological importance, Stung Treng province in Cambodia is facing rapid deforestation, a global issue now being monitored by the EU Observatory using Copernicus Sentinel-2 satellite data to support conservation efforts. Satellite imagery reveals a stark contrast in forest cover when comparing data from December 2018 to January 2024.

Credit: European Union, Copernicus Sentinel-2 imagery

Credit: European Union, Copernicus Sentinel-2 imagery The Copernicus Sentinel-2 image of Luxembourg City, acquired on 29 December 2025, aligns with urban management by providing high-resolution visual data that distinguishes grey urban surfaces from natural green areas, enabling local authorities to accurately monitor soil sealing and strategically organize sustainable city expansion.

 

  • Urban Management: Satellite tracking assists in the control of soil sealing. Local authorities use these measurements to better organize urban development.

The Copernicus Sentinel-2 image of Luxembourg City, acquired on 29 December 2025, aligns with urban management by providing high-resolution visual data that distinguishes grey urban surfaces from natural green areas, enabling local authorities to accurately monitor soil sealing and strategically organize sustainable city expansion.

Credit: European Union, Copernicus Sentinel-2 imagery

A Vital Ally During Natural Disasters

In emergency situations, every hour counts. Thanks to a “revisit” capacity every five days over the same point, Sentinel-2 serves as a critical support tool.

Credit: European Union, Copernicus Sentinel-2 imagery By capturing the Piton de la Fournaise eruption on 16 March 2026, this Copernicus Sentinel-2 image supports the Volcanic Activity thematic by mapping a seven-kilometre lava flow as it reaches the Indian Ocean and severs a major coastal road, providing critical data to identify risks to infrastructure and local communities.

 

  • Volcanic Activity: During eruptions, it allows for the tracking of lava flows and ash dispersal. This information protects local populations and air traffic.

By capturing the Piton de la Fournaise eruption on 16 March 2026, this Copernicus Sentinel-2 image supports the Volcanic Activity thematic by mapping a seven-kilometre lava flow as it reaches the Indian Ocean and severs a major coastal road, providing critical data to identify risks to infrastructure and local communities.

Credit: European Union, Copernicus Sentinel-2 imagery

The Copernicus Sentinel-2 false-colour image of Gaza Province, Mozambique, acquired on 29 January 2026, aligns with the thematic of Floods and Wildfires by providing immediate impact maps that distinguish inundated areas in turquoise from healthy red vegetation, directly assisting the Copernicus Emergency Management Service and UNHCR in identifying disaster zones and organizing humanitarian aid for displaced populations.

 

  • Floods and Wildfires: The satellite provides immediate impact maps. This data helps rescue teams identify disaster zones and organize humanitarian aid.

The Copernicus Sentinel-2 false-colour image of Gaza Province, Mozambique, acquired on 29 January 2026, aligns with the thematic of Floods and Wildfires by providing immediate impact maps that distinguish inundated areas in turquoise from healthy red vegetation, directly assisting the Copernicus Emergency Management Service and UNHCR in identifying disaster zones and organizing humanitarian aid for displaced populations.

Credit: European Union, Copernicus Sentinel-2 imagery

A Key Witness to Climate Change

Sentinel-2 records long-term transformations that the human eye cannot always perceive.

The Copernicus Sentinel-2 image of the Tasman Glacier, New Zealand, acquired on 30 January 2026, perfectly illustrates how satellites monitor glacial retreat and sediment dynamics within Aoraki Mount Cook National Park, serving as a direct visual indicator of climate change impacts on alpine ecosystems.

 

  • Glaciology: Satellites monitor glacial retreat and the fragmentation of ice shelves at the poles. These serve as direct indicators of global warming.

The Copernicus Sentinel-2 image of the Tasman Glacier, New Zealand, acquired on 30 January 2026, perfectly illustrates how satellites monitor glacial retreat and sediment dynamics within Aoraki Mount Cook National Park, serving as a direct visual indicator of climate change impacts on alpine ecosystems.

Credit: European Union, Copernicus Sentinel-2 imagery

Credit: European Union, Copernicus Sentinel-2 imagery Captured on 6 March 2026, this Copernicus Sentinel-2 image of Læsø supports the Coastal Sentinel mission. By visualizing turquoise sediment patterns and sandbanks, it allows for the precise tracking of shoreline changes. This data is vital for protecting fragile habitats for migratory birds.

 

  • Coastal Sentinel: The mission observes coastal erosion and analyzes water quality. It detects sediment presence or algae blooms, which are signs of ecological imbalance.

Captured on 6 March 2026, this Copernicus Sentinel-2 image of Læsø in Denmark supports the Coastal Sentinel mission. By visualizing turquoise sediment patterns and sandbanks, it allows for the precise tracking of shoreline changes. This data is vital for protecting fragile habitats for migratory birds.

Credit: European Union, Copernicus Sentinel-2 imagery

High-Performance Technology in Orbit

 

3D PLUS supports this mission through advanced hardware. Sentinel-2 features high-performance SDRAM, SRAM, MRAM, and EEPROM memory modules from 3D PLUS. These components ensure the reliability of data processing and storage while in orbit.