GSC Sentinel-2 PDGS STBD - emits - ESA

- (A 1 – D 1 ) ≤ 100 minutes, i.e.T BP(1) ≤ 100 minutes – downlink-time, for the first Level-1C output.GSC Sentinel-2 PDGS STBDIssue 1 Revision 2 (draft) - 25.07.2010GMES-GSEG-EOPG-TN-09-0031page 8 of 60It is assumed that the second constraint will be implied by the first one thanks to the FIFOstrategy, allocating an overall 100 minutes constraint to the global Bulk-Processing with alatency equal to the overall downlink-time between the first Level-1C output and the last.The overall processing timeline is depicted on Figure 1.D1D2S1S2A1A2Orbit NSensingDownlinkSAD≤ 80 min≤ 3 hoursFront EndProcessingBulk ProcessingFront-End processingresources are freed andavailable for the nextorbit processingBulk processingresources are freedgradually and madeavailable for the nextorbit processingOrbit N+1SensingDownlinkFront EndProcessingESA UNCLASSIFIED – For Official UseFigure 1: Processing TimelineFor non NRT data, it can be further assumed that:- The MSI RT data is received on-ground immediately after it was sensed i.e. its ageing iszero.- All other data has a maximum accumulated ageing of a few orbits, with 12 hours as worstcase.By cascading the NRT constraint onto the complete datastrip processed in FIFO it will beensured that regardless of its partitioning in RT, NRT or Nominal data:- The NRT data is processed up to Level-1C with 3 hours from sensing© 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.