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 117 of 204
5.11.2 PERFORMANCE REQUIREMENTS
S2-PDGS-ADS-020
The PDGS/ADS function shall supply all the required auxiliary data in advance according
to well-defined timing schedule according to every processing need.
5.11.3 OPERATIONAL REQUIREMENTS
S2-PDGS-ADS-025
The PDGS/ADS function shall generate and publish all the required auxiliary data in a
timely and reliable manner including all Level-2 auxiliary data defined in the PDGS-PDD
and the IERS UT1-UTC correlation data.
5.11.4 RAMS REQUIREMENTS
S2-PDGS-ADS-030
The PDGS/ADS function shall ensure nominal operations unattended for better than
99.7% of the time computed over one month time window and assuming a degradation of
such figure for no more than one day.
5.11.5 DESIGN & DEVELOPMENT REQUIREMENTS
S2-PDGS-ADS-035
The PDGS/ADS function design shall reuse existing infrastructure (e.g. ECMWF, IERS,
etc).
5.12 Data-Access Index (DAX) Requirements
5.12.1 FUNCTIONAL REQUIREMENTS
S2-PDGS-DAX-005
The PDGS/DAX function shall be responsible for federating the distributed Sentinel-2
product inventories spread throughout the PDGS in:
maintaining from individual inventory updates a consolidated and consistent master
index containing the relationships between the available product components and their
physical remote location in the PDGS centres;
Populating consolidated catalogue updates to the front-end service functions in charge
of the metadata catalogue and user services operations;
Resolving data location queries on the master index for data-access operations;
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