ESA title

The mission

Using novel technology, the Fluorescence Explorer (FLEX) is designed to yield information about the health of the world’s plants. The information gathered is used to improve our understanding of how carbon moves between plants and the atmosphere and how photosynthesis affects the carbon and water cycles.

The launch

Date: 15 September 2026
Site: Kourou, French Guiana
Rocket: Vega-C

FLEX
Vega-C takes FLEX and Sentinel-3C into orbit
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FLEX and Sentinel-3C launched

15/09/2026 8130 views 53 likes
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FLEX and Sentinel-3C ready for launch
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FLEX and Sentinel-3C ready for liftoff on Vega-C

14/09/2026 2173 views 27 likes
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Teams at ESOC during ESA’s FLEX and Copernicus Sentinel-3C launch and early orbit (LEOP) simulations
Enabling & Support

A team of teams like never before: rehearsing a unique laun…

11/09/2026 1826 views 41 likes
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Detecting plant stress from space
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Ten quirky facts about plant fluorescence

10/09/2026 1315 views 34 likes
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Vega-C fairing opens to reveal Sentinel-3C and FLEX
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Watch: FLEX and Sentinel-3C launch on Vega-C

09/09/2026 7636 views 50 likes
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FLEX and Sentinel-3C being sealed from view
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FLEX and Sentinel-3C sealed within Vega-C fairing

02/09/2026 2582 views 51 likes
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Safey is paramount when fuelling a satellite
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ESA’s photosynthesis satellite fuelled

20/08/2026 2210 views 47 likes
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FLEX and Sentinel-3 head to launch site
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FLEX and Sentinel-3C arrive at Europe’s Spaceport

16/07/2026 2326 views 43 likes
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FLEX, Sentinel-3C and MTG-I2 on show at TAS cleanrooms
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Three ESA-built satellites on show in France

16/04/2026 4701 views 59 likes
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FLEX
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Ride into space on Vega-C secured for FLEX and Altius

11/01/2022 5169 views 94 likes
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FLEX
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Thales Alenia Space leads the build of photosynthesis missi…

18/01/2019 5053 views 70 likes
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FLEX concept
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Deal signed for FLEX’s fluorescence finder

07/11/2016 8775 views 67 likes
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Mutant strip
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FLEX takes on mutants

25/08/2016 6627 views 87 likes
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FLEX concept
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New satellite to measure plant health

19/11/2015 20253 views 128 likes
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Understanding Earth
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Reports on Earth Explorer candidates CarbonSat and FLEX now…

30/06/2015 9557 views 33 likes
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Vegetation under stress
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Plant power from above

03/02/2015 9916 views 95 likes
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Fluorescence in laboratory
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Glowing plants a sign of health

12/02/2014 12297 views 88 likes
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ESA calls for Earth Explorer-8 Mission Advisory Group membe…

15/02/2011 2037 views 1 likes
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Understanding planet Earth
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Two new Earth observation missions chosen for further study

26/11/2010 6072 views 14 likes
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Candidate Earth Explorers
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Candidate Earth Explorer Assessment Reports now available

28/11/2008 2579 views 1 likes
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Measuring light reaction
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Joint campaign prepares for Sentinel-2 and FLEX

23/07/2007 2023 views 1 likes
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Workshop focuses on Candidate Explorer FLEX mission

21/02/2007 2398 views 3 likes
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