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1
CYTTARES a global database
for
inter-comparison of biophysical products

G. Derive1, C. Bacour1, F. Baret1, J.-L.
Champeaux2, V. Masson2, M. Weiss3, P. Bicheron4,
R. Lacaze4, M. Leroy4
(1)
(3)
(2)
(4)
CYCLOPES (Carbon cYcle and Change in Land
Observational Products from an Ensemble of
Satellites) www.avignon.inra.fr/cyclo
pes
Medium resolution sensors (AVHRR, MERIS, MODIS,
POLDER, VEGETATION, ...)
CYTTARES (CYCLOPES Training and
Testing Algorithm Reference Ensemble of Sites) -
to Train the network - to Test the algorithm - to
Inter-comparate products
Radiative transfer model inversion (neuronal
networks technique)
Biophysical variables (LAI, fAPAR, fCover)
? POSTER Why is the CYTTARES
database essential ?
2
The CYTTARES Database a representative world
biome selection
? Results 532 sites (area size of 11-km, 1-km
pixel resolution)
? POSTER How is the sites selection made ?
3
The CYTTARES Database a representative LAI time
evolution
? POSTER Is the CYTTARES LAI representative of
the real LAI ?