GSC Sentinel-2 PDGS SRD - emits - ESA

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GSC Sentinel-2 PDGS SRD Issue 1 Revision 2 (draft) - 25.07.2010 GMES-GSEG-EOPG-RD-09-0028 page 110 of 204 S2-PDGS-DC-130 The PDGS/DC function shall be able to support an overall average sustained circulation throughput via media of 200 Mbps. 5.9.3 OPERATIONAL REQUIREMENTS S2-PDGS-DC-135 The PDGS/DC function shall be deployed and operated locally in all PDGS centres. S2-PDGS-DC-140 It shall be possible to deploy the PDGS/DC function in a collaborative CDAM centre for autonomous operations by a third-party. S2-PDGS-DC-145 The PDGS/DC function shall generate synthetic operation reports along time, providing periodic and self-consistent updates over the recently performed activities (successful and failed) including a detailed inventory of all data circulations performed. The generated reports shall be systematically routed to the MCC function for configuration control and further processing. S2-PDGS-DC-150 The PDGS/DC function shall supply status information over all its processes and resources (i.e. log information, disk volumes usage, alarms, etc.) in real-time via the M&C function. S2-PDGS-DC-155 The PDGS/DC function shall minimize human intervention when performing retrieval / delivery operations from / to media interfaces. S2-PDGS-DC-160 The PDGS/DC function shall alert the operator by making use of the M&C function capabilities for all operations requiring urgent manual intervention including: Media loading/disposal operations; Contingency operations on repeated failures of circulation operations from/to media or electronic interfaces. S2-PDGS-DC-165 The PDGS/DC function shall centralise all data exchanges (file-based, e-mail, productdata, etc) for data input and output via electronic or media interfaces between every PDGS centre and its remote interfaces unless, specified otherwise. 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.
GSC Sentinel-2 PDGS SRD Issue 1 Revision 2 (draft) - 25.07.2010 GMES-GSEG-EOPG-RD-09-0028 page 111 of 204 S2-PDGS-DC-170 The PDGS/DC function shall centralise all data exchanges for input and output between the different PDGS sub-systems collocated within a centre, unless specified otherwise. S2-PDGS-DC-175 The PDGS/DC function shall autonomously retrieve from the International Earth Rotation Service (IERS) interface the UT1-UTC time correlation data S2-PDGS-DC-180 The PDGS/DC function shall autonomously retrieve from the European Centre Medium range Weather Forecast (ECMWF) the relevant auxiliary data (e.g. water vapour data). S2-PDGS-DC-185 The PDGS/DC function shall carry out the physical circulation of all the Mission Reference Files (MRF) amongst the applicable interface points (internal or / and external PDGS interfaces) on behalf of the MCC function. S2-PDGS-DC-190 The PDGS/DC function shall perform the sustained circulation operations of product-data between geographically distributed sites via digital communication networks and via media in support to the electronic circulation. 5.9.4 RAMS REQUIREMENTS S2-PDGS-DC-195 The PDGS/DC 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. S2-PDGS-DC-200 The PDGS/DC function shall guarantee zero data loss and full consistent transfers (e.g. no partial file transfers) between receivers and senders. S2-PDGS-DC-205 The PDGS/DC function shall guarantee the completeness and consistency of all circulation transactions in case of contingency (e.g. disk full, network problems, corrupt media, etc). It shall resume nominal operations once the contingency is solved (e.g. after a local disk/network contingency) or request reiteration of the circulation (e.g. in case of an unrecoverable media). S2-PDGS-DC-210 The PDGS/DC function shall retry any failed operation on a configurable frequency basis. After a configurable number of repeated failures, the operator shall be alerted. 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.
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