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 126 of 204 S2-PDGS-DAG-085 The PDGS/DAG function shall, when requested as a download-option, include a previewimage in the User-Products downloaded. S2-PDGS-DAG-090 The PDGS/DAG function shall package the User-Products in DIMAP or SAFE format as specified via a download-option. S2-PDGS-DAG-095 The PDGS/DAG function shall, when requested as a download-option, merge the granule data and metadata of Level-0, -1A or -1B products along the satellite track direction into 12 across-track granules as part of the download. S2-PDGS-DAG-100 The PDGS/DAG function shall, unless requested otherwise as a download-option, merge together partial and complementary UTM tiles of a Level-1C product into single complete tiles as part of the download. Comment: Partial and complementary tiles will be produced at the datastrip boundaries fragmented between two ground-stations downlinks. S2-PDGS-DAG-105 The PDGS/DAG function shall compile in the S2MSI0 User-Products the best available raw-data granules by discriminating on the quality/completeness of the granule in case of duplication across PDGS archives. Comment: Duplicated MSI raw-data scenes will be produced at the datastrip boundaries fragmented between two ground-stations downlinks. S2-PDGS-DAG-110 The PDGS/DAG function shall compile in the S2MSI1A and S2MSI1B User-Products the best available image granules by discriminating on the quality/completeness of the granule in case of duplication across PDGS archives. Comment: Duplicated granules may be produced at the datastrip boundaries fragmented between two ground-stations downlinks. S2-PDGS-DAG-115 The PDGS/DAG function shall generate consistent product metadata, function of the elements effectively assembled in the product hierarchy. S2-PDGS-DAG-120 The PDGS/DAG function shall systematically and dynamically generate the product-level quality control checks metadata consolidated over the full assembled product including: check of the overall product consistency; 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 127 of 204 summary product-level quality checks consolidated from the granule-level or datastriplevel quality checks. S2-PDGS-DAG-125 The PDGS/DAG function shall perform TCI downloads as singular tile downloads. S2-PDGS-DAG-130 The PDGS/DAG function shall, when relevant, merge together several partial and complementary TCI PDI tiles, each one covering in parts the tile area, and provide a single consolidated TCI tile in output. Comment: Partial and complementary TCI tiles will be produced at the datastrip boundaries fragmented between two ground-stations downlinks. S2-PDGS-DAG-135 The PDGS/DAG function shall support parallel downloads from the same source server and from different source servers in response to a single download request. S2-PDGS-DAG-140 The PDGS/DAG function shall optimise the download performance taking benefit of the scattering of the data in several centres and considering the communication performance between users and servers. S2-PDGS-DAG-145 The PDGS/DAG function shall, in optimising the download performance, be able to track and account for the amount of data downloaded by each user and globally on every server. S2-PDGS-DAG-150 The PDGS/DAG function shall allow to queue the download requests while keeping under a configurable limit the number of download operations performed in parallel at each centre based on the centre's outbound network resource bandwidth. S2-PDGS-DAG-155 The PDGS/DAG function shall prioritise the access to the download resources according to the user priority setting qualified in the authorisation acknowledgment provided by the MMUS function. S2-PDGS-DAG-160 The PDGS/DAG function shall apportion the usage of the network resources by public users for TCI downloads by means of a download priority setting assigned to TCI downloads configurable per centre. 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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Appendix B D O C U M E N T document
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GSC Sentinel-2 PDGS SRD - emits - ESA

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