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E uropean S pace a gency’s f l uorescence e x plorer m ission : C oncept and A pplications

G. Mohammed, J. Moreno, Y. Goulas , A. Huth , E. Middleton, F. Miglietta , L. Nedbal , U. Rascher , W. Verhoef , M. Drusch. E uropean S pace a gency’s f l uorescence e x plorer m ission : C oncept and A pplications. FLEX / S3 tandem concept. Altitude: ~815 km

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E uropean S pace a gency’s f l uorescence e x plorer m ission : C oncept and A pplications

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  1. G. Mohammed, J. Moreno, Y. Goulas, A. Huth, E. Middleton, F. Miglietta, L. Nedbal, U. Rascher, W. Verhoef, M. Drusch European Space agency’sfluorescenceexplorer mission: Conceptand Applications

  2. FLEX / S3 tandem concept Altitude: ~815 km Local solar time: 10:00 LTDN Temporal co-registration: < 6s (G) / 15s (T) Image courtesy of Dr. Stefan Kraft, European Space Agency

  3. Chlorophyll • Fluorescence Chlorophyll ‘a’ G. Mohammed, P&M Technologies

  4. LIGHT Chlorophyll 1O2* photochemistry • heat O2 fluorescence 3Chl* 1Chl* • Pathways for absorbed light G. Mohammed, P&M Technologies

  5. Field techniques Active & Passive fluorescence Remote CF sensors (Photo courtesy of Dr. IsmaelMoya, LURE facility, France)

  6. Pre-visual stress indicator Chlorosis Chl F 760 O2-A 687 O2-B Wavelength (nm) G. Mohammed, P&M Technologies

  7. Mission specs • Duration 4+ years • Coverage Latitudes -56˚S to +75 ˚ N; Islands > 100 km2; coastal < 50 km from land to ocean, < 10 m depth • Swath 105 km (target), 150 km (goal) • Spatial sampling distance300 m at nadir • Spectral range 500 to 780 nm • Spectral resolution 0.3 to 0.7 nm O2 bands, 0.7 to 2.0 nm red edge, 3 nm PRI (500-600 nm) & chl absorption bands (600-677 nm) • Time of day 10:00 LTDN G. Mohammed, P&M Technologies

  8. FLEX mission concept • Small-medium satellite • FLORIS – hyperspectral • Imaging spectrometer • Two functionalities: narrowband & wideband spectrometers WBS – medium resolution • VEGA launcher Image courtesy of S.Kraft, ESA

  9. Complexity G. Mohammed, P&M Technologies

  10. Key applications • Photosynthetic function • Resilience & recovery • Productivity • Early warning indicator G. Mohammed, P&M Technologies

  11. FLEXStudies • FLUSS – Atmospheric corrections for fluorescence signal and surface pressure retrieval over land (Jürgen Fischer) • PARCS – Performance Analysis & Requirements Consolidation Study (José Moreno) • PHOTOSYNTHESIS – SIF and photosynthesis (Gina Mohammed) G. Mohammed, P&M Technologies

  12. Photosynthesis Study • Model relating SIF & photosynthesis – Existing modules / models • Prototype algorithm – FLEX data • Stress effects on SIF – drought, freezing Study team: Gina Mohammed, Federico Magnani, Christiaan van derTol, WoutVerhoef, Yves Goulas, UweRascher, Julie Olejnickova, José Moreno www.flex-photosyn.ca

  13. ESA – J. Huart, 2008

  14. European Space Agency’s FLuorescenceEXplorer Mission (FLEX): Concept and ApplicationsPresentation by Dr. Gina H. Mohammedto the American Geophysical UnionAGU Fall MeetingSan Franciso, California, USA3–7 December 2012Session B53G:Remote Sensing of Terrestrial Carbon Fluxes IIG. Mohammed, J. Moreno, Y. Goulas, A. Huth, E. Middleton, F. Miglietta, L. Nedbal, U. Rascher, W. Verhoef, M. Drusch

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