GSC Sentinel-2 PDGS STBD - emits - ESA

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GSC Sentinel-2 PDGS STBDIssue 1 Revision 2 (draft) - 25.07.2010GMES-GSEG-EOPG-TN-09-0031page 15 of 604. Preliminary Quicklook images generationa. Low resolution extraction;b. Geolocation,c. Preliminary Quicklook images generation;5. Technical quality masks construction (from the missing/erroneous source packets)6. Cloud Cover Masks and notation7. JP2K compression and archiving of the Quicklook images and the associated masksFigure 4 depicts the Level 1 processing flow to a high-level.Figure 4: Level 1 processing and productsESA 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.
GSC Sentinel-2 PDGS STBDIssue 1 Revision 2 (draft) - 25.07.2010GMES-GSEG-EOPG-TN-09-0031page 16 of 603.2.2 BENCHMARKED PROCESSING TIMES3.2.2.1 Level-0 processing timesThe following values correspond to elementary computing times (or complexity equivalent)and don’t take into account any possible parallelisation of processing; indeed theycorrespond to sequential processing (only one core has been activated).The benchmarks have been done on the hardware configuration indicated in section 3.1.4.The following table highlights the most time-consuming processing steps. A securitymargin of 15% has been considered in the unitary processing times to take intoaccount the contribution of activities that can be assumed as minor in terms of timeconsumption (e.g. the interaction between the supervision subsystem and theprocessing subsystems, data formatting, etc).Processing StepMSI Telemetry AnalysisDatationSatellite Ancillary TelemetryAnalysisLow-Resolution ImageExtractionAssociated GPP reference (IAS andapplicable phase/functions asrelevant)AnaTM (AnaTM-Image function)Datation & LR Extraction (Datationfunction)AnaTM IAS (AnaTM-SAD function)Datation & LR Extraction (LRExtraction function)Table 2: Benchmarked front-end processing timesEstimated Time (h)w/o parallelisation0,610,11Note: DFEP processing - telemetry demodulation and decommutation, source packetsorganization in Granules - has not been taken into account in these benchmarks.3.2.2.2 Level-0 Consolidation and Level-1 processing timesThe following values correspond to elementary computing times (or complexity equivalent)and don’t take into account any possible parallelisation of processing; indeed theycorrespond to sequential processing (only one core has been activated).The benchmarks have been done on the hardware configuration indicated in section 3.1.4.The following table highlights the most time-consuming processing steps. A securitymargin of 15% has been considered in the unitary processing times to take intoaccount the contribution of activities that can be assumed as minor in terms of timeconsumption.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.
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