Difference between revisions of "USER REQUIREMENTS"

Revision as of 11:30, 11 November 2020

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TIMELINESS A key element for the GFM service is the timeliness of the product generation. After reviewing the requirements of the tender and considering the practical experience of the whole team of the expert flood monitoring alliance adequate measures to ensure a guaranteed product timeline of <= 8 hours are proposed for all Sentinel-1 GRD scenes becoming available on the ESA data hubs within < 5 hours.  P.88 metodi per rispettare la timeliness p. 88 In summary, product timeliness of less than 8 hours will be ensured via the following measures: Redundant Sentinel data access via multi access point data downloads and parallelisation of downloads for an optimised bandwidth utilisation via the HubWatcher software.

• The automatic retrieval of Sentinel-1 GRD data with the HubWatcher in 96.3 minutes on average following ESA publication for general availability. There is already understanding of the requisite steps to be taken to further decrease this value to provide available within 60 minutes. • Pre-processing of Sentinel-1 GRD data products and insertion into the data cube format within 10-20 minutes per scene. • Fast data access to the data cube with IO speeds of 15GiB/s or 120Gbps. This will further increase with the proposed high-speed replicated storage. • The generation of the ensemble global flood monitoring product using the three parallel algorithms consumes up to 30 minutes, with the final flood extent maps and uncertainly values being calculated within a matter of seconds. • The total lead time of the global flood monitoring product can be given with 60 minutes to complete the entire operational NRT workflow from acquisition to delivery.

our proposed GFM system will deliver 90 % of the data within a total time of LESS THAN 8 HOURS FROM S1 ACQUISITION

5.1.2 Guaranteed service availability is facilitated through EODC’s 6 year old Sentinel-1 processing operations expertise, which is regularly being assessed by the ESA mission reports, and which lessons learned will be used to implement a completely independent IT infrastructure for the CEMS GFM system operations (section 2.3); the operations will by also be organized through redundant 24/7 production coordinator staff availabilities, such that we can guarantee a 99% SERVICE AVAILABILITY (section 2.3);

5.1.3 Quality of reference water mask, exclusion layers and QC flag methods excelling flood detection quality expectations Due to the highly advanced methods and quality of input data we can guarantee a flood delineation and water mask ACCURACY of >90%, significantly excelling the minimum requirements (section 1.4.3);