GSC Sentinel-2 PDGS SRD - emits - ESA

GSC Sentinel-2 PDGS SRD
Issue 1 Revision 2 (draft) - 25.07.2010
GMES-GSEG-EOPG-RD-09-0028
page 96 of 204
S2-PDGS-AI-040
The PDGS/AI function shall organize and structure the storage in a hierarchical structure
of granular Product Data Items (PDIs) in view of flexible data storage and retrieval
operations.
The PDIs are composed by a set or excerpt of the following elements:
Image data (L0 granules, L1A/1B/1C spectral band data granules, TCIs, etc)
Image metadata
Image quality indicators and quality checks
Satellite ancillary data (satellite orbit position, velocity, time, attitude)
Orbit metadata
Auxiliary data (GIPP, etc.)
Satellite HKTM data
etc
S2-PDGS-AI-045
The PDIs shall be organised according to their scope and granularity e.g. at the level of
the orbit, group of orbits, a satellite pass, a granule, a group of granules, etc while
maintain their inner relationships within the hierarchy. In particular, the hierarchy of MSI
PDIs modelled in the archive should mirror at best the products breakdown structure
specified in the Product Definition Document [PDD].
S2-PDGS-AI-050
The PDGS/AI function shall be able to identify and discriminate between different
concurrent versions of the PDIs (except raw data PDIs) archived as consequence of data
reprocessing activities (different processor versions, different auxiliary data usage, etc.).
S2-PDGS-AI-055
The PDGS/AI function shall be able to identify and discriminate between different
concurrent versions of the Level-1A and Level-1B granule-level PDIs according to their
quality/completeness.
S2-PDGS-AI-060
The PDGS/AI function shall be able to identify and discriminate between different
complementary versions of the Level-1C and TCI granule-level PDIs generated and
archived at different centres according to their effective data coverage of the granule (a
UTM tile).
Comment: Partial and complementary Level-1C and TCI tiles will be produced at the
datastrip boundaries fragmented between two ground-stations downlinks.
ESA UNCLASSIFIED – For Official Use
© ESA
The copyright of this document is the property of ESA. It is supplied in confidence and shall not be reproduced, copied or
communicated to any third party without written permission from ESA.