Medspiration â System Requirements Document - Data User Element

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Medspiration MED-SOC-RS-001_1 System Requirements Document Issue F Page Table, fig. Reference ID Text from reference documents SR entry Medspiration forms the initial pilot study for the MERSEA GDAC which will provide an operational backup processing system to the US GDAC described above. MERSEA aims to develop a European system for operational monitoring and forecasting on global and regional scales of the ocean physics, biogeochemistry and ecosystems. The prediction time scales of interest extend from days to months. This integrated system will be the Ocean component of the future European Global Monitoring for Environment and Security (GMES) system. An initial configuration of the MERSEA EU GDAC is expected in 2006/7. 18 GDS-013 Figure 1.2 shows the configuration of the GHRSST-PP Regional/Global task sharing system that will implement the GDS. In addition to the global processor system, the GDAC also hosts the GDS (international) system-wide metadata repository (MMR), matchup database system (MDB), High Resolution Diagnostic Data Set (HR-DDS) and main product archive. RDAC will also maintain their own specific archives of L2P data products, HR-DDS, MDB and ultra-high resolution (~2km spatial grid) data products as required but the MMR will always reside at the GDAC. SYS.0010 SYS.0060 SYS.0070 SYS.0090 SYS.0100 ARC.0010 19 The GHRSST-PP Data Processing Specification (GDS) 19 1 GDS-014 The GHRSST-PP Data Processing Specification (GDS) is a recommended common data processing specification that NASR should be implemented at each GHRSST-PP RDAC and GDAC. It defines clearly the input and output data specifications, data processing procedures, algorithms and data product file formats that are used within the GDS and are thus common to each GHRSST-PP RDAC and GDAC. This is a prerequisite if the GHRSST-PP Global/Regional task sharing implementation framework is to function efficiently. 19 7 GDS-015 The GDS specifies in detail the minimum data processing that should be performed at each RDAC and GDAC centre to SYS.0020 ensure that data and data products can be used and exchanged with confidence. For example, a common processing description is necessary to simplify documentation of data, facilitate exchange by sharing a common data format agreed by RDAC, GDAC and users, to avoid significant duplication of effort, to minimise reformatting of different data products © 2004 SOC Page 114 of 193
Medspiration MED-SOC-RS-001_1 System Requirements Document Issue F Page Table, fig. Reference ID Text from reference documents SR entry derived by RDAC and to ease the integration of RDAC data to provide global coverage data sets at GDAC centres. Lowlevel data products generated according to the GDS will form a direct input to the GHRSST-PP reanalysis project (RAN). These operationally produced data products will then be improved by using additional data that are only available in a delayed mode together with extensive quality control procedures. The GHRSST-PP RAN Strategy is described in Casey et al. (2003). 19 GDS-016 GHRSST-PP RDAC centres must implement data processing procedures that account for specific aspects of regional SYS.0010 coverage input data products (e.g., geostationary imagers). RDAC must also provide additional data products and services to satisfy regional user requirements (e.g., regionally specific analysed data products or ultrahigh resolution data products) that will require research and development of new analysis, quality control, and data provision procedures. Regional extensions to the GDS are both necessary and critical to the preservation of regional identity and the proper evolution of the GDS; without evolution, the data products and services provided by the GHRSST-PP are unlikely to satisfy developing user demands and concerns. 20 GDS-017 It is not possible to specify exactly how the final version of the GDS will be implemented and operated without first having an initial ‘Version-1’ system in place to make an informed assessment. Neither is it desirable to have a GDS that is rigid SYS.0021 DES.SYS.0040 without the ability to innovate based on experience. The first version of the GDS (v1.0) is focused on an initial data processing specification with specific emphasis on implementing: 20 GDS-018 (a) An operational data exchange and delivery system connecting data providers, RDAC, GDAC and user communities by SYS.0015 2005, 20 GDS-019 (b) A number of common format (L2P) sensor specific near real time SST data products SYS.0050 20 GDS-020 (c) A suite of regional L4 data products based on different analysis procedures following current state-of-the-art knowledge SYS.0080 that can be upgraded and refined based on experience. The analysis procedures should as far as possible capitalise on the synergy benefits of complementary measurements (accuracy, susceptibility to atmospheric clouds and aerosol loading, © 2004 SOC Page 115 of 193
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Medspiration â System Requirements Document - Data User Element