MERIS L1b product (mandatory for both FLINT and AGC parts)
AATSR L1b product (mandatory if a Glint value from the FLINT processor shall be used in
the GGAC algorithm, otherwise not needed).
The FLINT computation is performed for the overlapping areas of the MERIS/AATSR scenes. For
the areas covered by MERIS only, just the AGC computation is provided.