GSC Sentinel-2 PDGS OCD - Emits - ESA

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GSC Sentinel-2 PDGS OCD Issue 1 Revision 2 (draft) - 25.07.2010 GMES-GSEG-EOPG-TN-09-0008 page 176 of 350 ○ Polar X-Band stations (typically one or two) able as a whole to receive the data from Sentinel-2 spacecrafts once per orbit. They will additionally be equipped to retransmit the data in near-real-time through EDRS 220Mbps data-repatriation transponders; ○ A network of a TBD number of Ka/Ku-Band stations spread throughout Europe in the EDRS reception footprints of both the data-relay and the data-repatriation transponders. Those stations will be able to receive the complementary Sentinel-2 downlinks via the OCP and EDRS as well as the data repatriated by multicast in Ku- Band from polar stations. Taking benefit from the compound usage described above, the repatriation capability will be used to multicast in near-real-time the raw-data acquired at polar-stations throughout Europe which will amount to half of the overall mission data. Coupled with the data-relay downlinks securing the other half in multicast directly from the spacecrafts, this operation configuration will lead to a fully flexible ground network bringing the huge Sentinel-2 data volumes nearly anywhere in Europe for local processing and distribution close to the users. The repatriated data volume from polar-stations, amounting in average to 8 minutes of payload data from each spacecraft, can be multicast within about 18 minutes on the EDRS 220Mbps bandwidth repatriation path. Considering two Sentinel-2 units in orbit, usage of the link will be limited to 36 minutes in average per every 100 minutes which is about a third of the assumed time-shared capacity allocated to Sentinel-2. This scenario is hence deemed achievable while providing NRT access to the global Sentinel- 2 data anywhere in Europe, provided the repatriation path is available to the Sentinel-2 mission at the right time. Beyond the noteworthy benefits that such scenario would bring in terms of flexibility, reliability and performance, it would also considerably reduce the needs for operating high-bandwidth point-to-point ground-lines to move the large volumes of Sentinel-2 data throughout Europe. The global multicast data will be filtered in input to each centre (e.g. divided by geographical regions) while providing for the necessary redundancy between centres to ensure global reliability. Each centre will autonomously bring the raw data to higher-levels by local processing and distribute it into a federated data-access network. End-users will mostly rely on the ground network infrastructure, possibly enhanced to their needs, to access the data from the local centres via the federated network. In complement, the data-broadcast capability will be used to reach locations that are poorly served otherwise. This operation configuration is depicted below: 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 OCD Issue 1 Revision 2 (draft) - 25.07.2010 GMES-GSEG-EOPG-TN-09-0008 page 177 of 350 S2A/B LCT Data-Relay Transponder X-Band Data-Repatriation Transponder EDRS Ka-Band relay multicast PDGS X-Band CGS PDGS X-Band CGS Ku-Band repatriation multicast X-Band LGS EDRS LGS EDRS LGS X-Band LGS PDGS EDRS CGS PDGS EDRS CGS PDGS Data-Access Network Long-Term Circulation PDGS EDRS CGS PDGS EDRS CGS EDRS LGS EDRS Dissemination Transponder Dissemination broadcast PDGS PAC PDGS PAC Figure 4-33 Enhanced PDGS Operation Layout with EDRS 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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[RD-33] Sentinel-2 MSI - Level 2A A
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LES LGS Land Equipped Sites Local G
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3.5.2 MULTI-SPECTRAL INSTRUMENT CHA
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Table 4-5 Radiometric image quality
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o preserving integrity of exchanged
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6 DETAILED OPERATIONS CONCEPTS GSC
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o Report generation frequency and c
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○ MSI L1A, L1B, L1C and TCI produ
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Some relevant use cases are present
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Two main mapping services have been
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The requirement on the cloud covera
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GSC Sentinel-2 PDGS OCD - Emits - ESA

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