GSC Sentinel-2 PDGS OCD - Emits - ESA

GSC Sentinel-2 PDGS OCD
Issue 1 Revision 2 (draft) - 25.07.2010
GMES-GSEG-EOPG-TN-09-0008
page 205 of 350
In addition, two complementary system-management support functions are identified:
○ A Reference Platform (RP) function previously introduced in section 4.6 and globally in
charge of system-level configuration control, system validation and transfer to
operation activities as required for maintenance and evolutions throughout the PDGS
lifetime;
○ A Monitoring and Control (M&C) function globally scattered and embedded across all
functional domains and in charge of providing a central monitoring and control view in
each PDGS centre over the centre processes and resources to support operational
system-management activities;
Finally, a Collaboration Support Service (CSS) function is provisioned for with the dual
objective of providing technical support vis-à-vis the collaboration peers according to the
needs of each type of collaboration expressed in sections 4.10.2.1 and 4.10.2.2, and liaising
with the mission management for the definition of the collaborations and associated progress
reporting during implementation as defined in section 4.10.3.2.4.
5.2.2.3 Data Communication Functions
5.2.2.3.1 Core Objective
As primary goal, the Communication functions aim at providing the necessary means to
effectively transport data internally and externally to the PDGS.
As such, they enclose all physical communication means ranging from digital communication
networks to standard post mail or telephone services allowing the transportation of
information between geographically remote entities.
This function group is hence supporting all other functions requiring physical data exchanges
across PDGS centres or towards external interfaces.
5.2.2.3.2 Design Drivers
The main drivers shared by Communication Functions are mostly driven by the high volumes
of data to be transported within and beyond the PDGS premises. Associated drivers are
highlighted such as:
○ A high communication throughput down the data elaboration chain for the timely
distribution of heavyweight products as close as possible to the user sites;
○ The guaranteed security of all internal digital data communications between
geographically distributed PDGS centres preventing unauthorised access or usage of
the communication means by entities beyond the extended scope of the PDGS, i.e. not
excluding potential collaborative entities;
○ The guaranteed security of all digital data communications versus the FOS preventing
unauthorised access or usage of the communication means beyond the sole PDGS-
FOS transactions;
○ The reliability of the communications in preserving the integrity of the data transported;
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