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 106 of 204
5.8.3 OPERATIONAL REQUIREMENTS
S2-PDGS-LTA-040
The LTA service function shall be integrated and operated in two geographically
distributed PACs.
S2-PDGS-LTA-045
The LTA service function shall implement a well-defined data preservation policy in line
with the LTDP objectives and inter-agency guidelines.
S2-PDGS-LTA-050
The LTA service function shall systematically ingest and archive all the product data
auxiliary data provided at the AI function interface.
S2-PDGS-LTA-055
The LTA service function shall perform autonomous data retrieval operations from longterm
storage as triggered by and according to the AI function interface.
S2-PDGS-LTA-060
The LTA service function shall nominally archive all the L0 data (MSI & HKTM) for the
PDGS operational lifetime.
S2-PDGS-LTA-065
The LTA service function shall nominally maintain all the MSI L1B and L1C product data
for the PDGS operational lifetime, keeping always the most up-to-date version of every
generated product.
S2-PDGS-LTA-070
The LTA service function shall perform bulk data reprocessing operations on a need basis
and provide the resulting inventory metadata at the AI function interface for inventory.
5.8.4 RAMS REQUIREMENTS
S2-PDGS-LTA-075
The LTA service function shall provide nominal archiving and retrieval operations with a
success probability better than 99.7% computed over one month time window and
assuming a degradation of such figure for no more than one day.
S2-PDGS-LTA-080
The LTA service function shall ensure that no archived data is lost.
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