e uropean s pace a gency’s f l uorescence e x plorer m ission : c oncept and a pplications
DESCRIPTION
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 - PowerPoint PPT PresentationTRANSCRIPT
G. Mohammed, J. Moreno, Y. Goulas, A. Huth, E. Middleton,
F. Miglietta, L. Nedbal, U. Rascher, W. Verhoef, M. Drusch
EUROPEAN SPACE AGENCY’S FLUORESCENCE EXPLORER MISSION:
CONCEPT AND APPLICATIONS
Altitude: ~815 kmLocal solar time: 10:00 LTDNTemporal co-registration:< 6s (G) / 15s (T)
FLEX / S3 tandem concept
Image courtesy of Dr. Stefan Kraft, European Space Agency
ChlorophyllFluorescence
Chlorophyll ‘a’
G. Mohammed, P&M Technologies
1O2*
1Chl*
photochemistryChlorophyll
LIGHT
O2
heat
fluorescence3Chl*
Pathways for absorbed light
G. Mohammed, P&M Technologies
Active &
Passive
fluorescence Remote CF sensors
(Photo courtesy of Dr. Ismael Moya,
LURE facility, France)
Field techniques
Pre-visual stress indicator
Chl
F
Wavelength (nm)
760O2-A
687O2-B
Chlorosis
G. Mohammed, P&M Technologies
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 distance 300 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
Mission specs
G. Mohammed, P&M Technologies
FLEX mission concept
Image courtesy of S.Kraft, ESA
• Small-medium satellite• FLORIS – hyperspectral Imaging spectrometer• Two functionalities: narrowband & wideband spectrometers WBS – medium resolution• VEGA launcher
Complexity
G. Mohammed, P&M Technologies
Key applications• Photosynthetic function• Resilience & recovery• Productivity • Early warning indicator
G. Mohammed, P&M Technologies
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)
FLEX Studies
G. Mohammed, P&M Technologies
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 der Tol, Wout Verhoef,
Yves Goulas, Uwe Rascher, Julie Olejnickova, José Moreno
www.flex-photosyn.ca
Photosynthesis Study
ESA – J. Huart, 2008
European Space Agency’s FLuorescence EXplorer Mission (FLEX): Concept and
Applications
Presentation by Dr. Gina H. Mohammedto the American Geophysical Union
AGU Fall MeetingSan Franciso, California, USA
3–7 December 2012
Session B53G:Remote Sensing of Terrestrial Carbon Fluxes
II
G. Mohammed, J. Moreno, Y. Goulas, A. Huth, E. Middleton, F. Miglietta, L. Nedbal, U. Rascher, W. Verhoef, M. Drusch