re 
r 
a 
a? 
nf 
a 
SANTOLERI, R.', BRANDO, V. E.', COLELLA, S.', VOLPE, G.', DI CICCO, A.', BÖHM, E.', 
CESARINI, C.', FORNERIS, V.', GARNESSON, P.’, MANGIN, A.?, CALTON, B.*, NETTING, J.?, 
KRASEMANN, H.“, HIERONYMI, M.“, D’ALIMONTE, D.5, STELZER, K.°, VAN DER ZANDE, D.’ 
'CNR ISMAR, ?ACRI, >PML, “Hereon, 5AEQUORA, *Brockmann Consult, /RBINS 
DVERVIEV- 
The Ocean Colour Thematic Assembly Center (OCTAC) of 
the Copernicus Marine Environment Monitoring Service 
(CMEMS) provides high-quality core Ocean Colour products 
for the global ocean and European seas based on multiple 
Ocean Colour missions. The OCTAC relies on current and 
SeaWFS 
MERIS 
MODIS/Aquai 
VIRS/SNPP 
OLCFSentinel 3A 
VIRS/NOAA-20 
OLCFSentinel 35 
PACE 
VIIRS/IPSS2 
3LCFSentinel 3C 
VIRSPSS3 
OLVLandsat 8 
MSLFSentinel 2A 
MSFSantinel2B 
PRISMA 
OL2/Landsat 9 
MSVSentinal 2C 
CHIME/Sentinel 10 _ 
1995 
ar 
2000 
2005 
”0D1D 
legacy OC sensors (Figure 1): SeaWiFS (NASA) and MERIS 
(ESA) (both no longer operational), MODIS/Aqua from 
NASA, VIIRS on NPP and NOAA-20 operated by NOAA, and 
OLCI on Sentinel-3A and 3B operated by EUMETSAT. In 
2018-2021, OC data streams shifted from science missions 
‘SeaWiFS, MERIS and MODIS) toward operational missions 
(two OLCI and two VIIRS sensors). Since mid 2020, OCTAC 
relies also on the operational high-resolution imagers: MS 
on Sentinel-2A and B operated by ESA. 
HT a 
——: 
20115 
2020 
LLC 
ı —— —m—— — 
2025 2020 
jgure 1: Legacy, current and forthcoming (approved and planned) ocean colour sensors and high-resolution imagers (source CEOS). Red 
ıdentifies science missions, Blue identifies operational OC missions, brown identifies hiah-resolution imacers.