GSC Sentinel-2 PDGS STBD - emits - ESA

GSC Sentinel-2 PDGS STBDIssue 1 Revision 2 (draft) - 25.07.2010GMES-GSEG-EOPG-TN-09-0031page 1 of 601 INTRODUCTION1.1 Purpose of the DocumentThis document aims at providing an insight over the major drivers and rationale applicable tothe dimensioning of the Sentinel-2 PDGS. It is presented under the form of an analysisproviding the logic, assumptions, justifications and resulting coarse estimations of the dataprocessing, archiving, circulation and dissemination resources associated to fulfilling thePDGS sizing and performance requirements specified in [RD-01] under the PDGS operationscenario and constraints defined in [RD-02].1.2 Scope and DependenciesThe study presented in this document builds upon the PDGS baseline configurationpresented in [RD-04] assuming the exploitation of a network of 4 X-Band Core GroundStations to recover the data from the constellation of two Sentinel-2 satellites, complementedby other PDGS elements to assume additional functions.It is recalled that the physical layout of the PDGS, in number, type and geographical locationof the centres that will be finally deployed and scaled to carry out the operations is at thisstage not settled. In this respect, the resulting figures derived in this document are anexample of the PDGS sizing cascading from this example layout.Based on this layout, the document presents a dimensioning rationale based upon: The average volume of data received in each centre (variable with the finally selectedstation/centre distribution) based on preliminary mission simulations reported in [RD-04] from the assumptions defined in [RD-07] The high level PDGS performance requirements for data processing derived from[RD-01] and [RD-02] Unitary processing performance figures and an analysis of potential parallelisationcapabilities derived from high-level algorithm descriptions and preliminarybenchmarking provided in [RD-03]. Data circulation, archiving and dissemination requirements cascading from the productavailability baseline defined in [RD-01] and [RD-02]. Unitary data volume sizing assumptions inherited from [RD-03].ESA UNCLASSIFIED – For Official Use© ESAThe copyright of this document is the property of ESA. It is supplied in confidence and shall not be reproduced, copied orcommunicated to any third party without written permission from ESA.