2014 FLEX/Sentinel-3 Tandem Mission FLEX Bridge Study – FINAL REPORT
PMT / Gina Mohammed – 2016-01-14
Gina H. Mohammed (Study Manager), Roberto Colombo, José Moreno,
Christiaan van der Tol, Uwe Rascher;
Alexander Ač, Luis Alonso, Marco Celesti, Sergio Cogliati, Alexander Damm, Dominic Fawcett, José Gomez-Dans,
Claudio Henry, Philip Lewis, Natasha MacBean, Federico Magnani, Jacques Malaprade, Maria Matveeva, Julie Olejnícková,
Dan Pernokis, Francisco Pinto, Sabrina Raddi, Nastassia Rajh Vilfan, Juan Pablo Rivera, Micol Rossini, Neus Sabater,
Anke Schickling, Carolina Tenjo, Wout Verhoef, Jochem Verrelst, Jorge Vicent Servera;
Matthias Drusch (ESA/ESTEC Technical Officer).
Gustau Camps-Valls, Daniel Kovác, MaPilar Cendrero Mateo, Silvia Garbari, Luis Guanter, Ari Kornfeld, Jordi Muńoz-Marí,
Caroline Nichol, Cinzia Panigada, Patrick Rademske, Fabian Schneider, Giulia Tagliabue, Sebastian Wieneke,
and Mat Williams;
FLEX Mission Advisory Group, including Yves Goulas, Andreas Huth, Elizabeth (Betsy) Middleton, Franco Miglietta,
and Ladislav Nedbal; ESA: Stefan Kraft, Umberto Del Bello, and Dirk Schüettemeyer.
The FB Study has advanced approaches for retrieval & applications of solar-induced fluorescence (SIF)
for assessment of photosynthesis & stress status in terrestrial vegetation, including development of a calibration/validation
strategy for FLEX products.
Specific advances include:
(i) optimisation of SIF retrieval algorithms, formalisation of fluorescence-derived indices, and development of
(ii) SIF-photosynthesis model improvements and evaluation of data assimilation techniques;
(iii) testing of stress indices, extension of the range of potential applications, and evaluation of non-photochemical
protection mechanisms; and
(iv) development of calibration/validation strategies, including metrics for validation error & product accuracies,
definition of FLEX Level 2/3 products and their validation plan, and definition of a common protocol and
state-of-the-art instruments to be used for estimation of fluorescence in the context of cal/val activities.
This activity now forms the foundation for subsequent science & applications development during
FLEX mission development & deployment.
Whereas much of the space-based SIF detection to date has focused on the far-red fluorescence – owing to the fact that
the sensors were not specialised for full fluorescence retrievals – current information is incomplete and
limits the ability to derive important interpretive information for identifying & tracking stress effects and also
for quantification of photosynthetic rates. Both the visible and near-infrared spectra are important for retrieval of both
red and far-red fluorescence peaks, peak wavelength positions & shifts, and ancillary indices such as PRI and NDVI (or EVI).
The FULL REPORT file contains the Abstract and Executive Summary (and the latest Errata sheet if applicable),
although these are also provided as separate files. The Cover Title Page is intended only for printing a cover on cardstock,
so it is not included within the main document.
To download an item, right-click the VIEW link and use your web browser's "Save As" or "Save Link As" function.
The Final Report is laid out with page parity (all sections start on an odd page), so there are alternating blank pages at the very beginning of the PDF file.