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 152 of 204
S2-PDGS-MPL-065
The conflict-free Downlink-Plan shall plan (OCP) data relay activities to the EDRS GEO
according to the assigned communication segments to the Sentinel-2 Mission.
S2-PDGS-MPL-070
The PDGS/MPL function, as part of the Downlink-Plan generation, shall command the
MMFU (playback activities), the XBS and the OCP according to the operation constraints
described in the [SOCD].
S2-PDGS-MPL-075
The PDGS/MPL function, optionally, shall be able to constrain the OCP usage within the
Downlink-Plan wrt the MSI imaging requests contained Image-Acquisition-Plan.
Accordingly, when this option is active, it shall not plan any OCP operations during
planned MSI imaging operations.
S2-PDGS-MPL-080
The PDGS/MPL function, optionally shall be able to downlink the same data
simultaneously through the XBS and OCP systems.
S2-PDGS-MPL-085
The PDGS/MPL function shall be able to plan on predefined segments OCP data
transmission activities without deletion on memory. In order to verify the OCP operations,
it shall be possible to not delete on the memory the data transmitted.
S2-PDGS-MPL-090
The PDGS/MPL function shall be able to plan on predefined segments OCP data
transmission activities with simultaneous MSI imaging operations. It shall be possible to
verify the impact (micro vibrations) of OCP operations wrt MSI imaging activities.
S2-PDGS-MPL-095
The PDGS/MPL function shall minimise the number of XBS switching cycles when
generating the Downlink-Plan according to the XBS duty-cycle defined in the [SOCD].
S2-PDGS-MPL-100
The PDGS/MPL function shall schedule the required MMFU playback activities of the MSI,
satellite ancillary and HKTM data as part of the Downlink-Plan generation.
S2-PDGS-MPL-105
The PDGS/MPL function shall characterise all spacecraft/payload operation constraints
described in the [SOCD] and the operations restrictions that are applicable to the PDGS
(e.g. on-board systems duty cycles, etc) into the Spacecraft Safety Constraints File.
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