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 distributed HR-DDS nodes. Using a HR-DDS interface, users at the HR-DDS virtual server may access all HR-DDS granules (maintained at distributed locations, served by local DODS servers) using DODS aware client applications as if they were a single data archive residing on a local computer. 160 AP5-014 In addition to DODS access, HR-DDS granules may also be accessed using secure ftp (sftp) transactions or through a Live NASR Access Server (LAS, http://ferret.pmel.noaa.gov/Ferret/LAS/). LAS is a highly configurable Web server designed to provide flexible access to geo-referenced scientific data and can present distributed data sets as a unified virtual data base through the use of DODS networking 160 AP5-015 Using a web browser interface LAS enables a user to visualize data with on-the-fly graphics; request custom subsets of NASR variables in a choice of file formats ;access background reference material about the data (metadata) ;compare (difference) variables from distributed locations 161 AP5-016 LAS enables the data provider to unify access to multiple types of data in a single interface ;create thematic data servers NASR from distributed data sources ; offer derived products on the fly ; remedy metadata inadequacies (poorly self-describing data) ; offer unique products (e.g. visualization styles specialized for the data) 161 AP5-017 LAS will be used extensively in the GODAE project and will allow data to be extracted from many operational ocean model NASR systems for inclusion and comparison with HR-DDS SST data. In addition, the LAS system is in active development to provide advanced features such as temporal aggregation of data and advanced display options in collaboration with the GODAE Data Sharing Pilot Project. 161 AP5-018 Each HR-DDS node is thus responsible for NASR 161 AP5-019 (a) Installing and maintaining a data archive of HR-DDS granules and associated MMR DSR and MMR-FS metadata DDS.0110 records (see Appendix A6) 161 AP5-020 (b) Operating a DODS server to serve HR-DDS data DDS.0140 EXT.DDS.0030 © 2004 SOC Page 174 of 193
Medspiration MED-SOC-RS-001_1 System Requirements Document Issue F Page Table, fig. Reference ID Text from reference documents SR entry 161 AP5-021 (c) Operating an sftp server for HR-DDS granule access EXT.DDS.0040 161 AP5-022 (d) Operating other optional data interface software (e.g., LAS) tbd A5.2 HR-DDS data granule file format 161 AP5-023 HR-DDS granules are formatted as netCDF data files according to the format description laid out for L2P data file in DDS.0120 Appendix A1 161 AP5-024 The main difference between L2P data and HR-DDS data files is that HR-DDS data have been re-sampled using a nearest neighbour scheme to a uniform resolution grid specified in Table A1.1.3 DDS.0030 DDS.0090 161 AP5-025 All L2P confidence data are re-sampled in the same manner to provide a multiple image netCF file. DDS.0030 A5.3 HR-DDS metadata record format and registration 161 AP5-026 HR-DDS granule metadata records are identical in content and format to GDS metadata records. A full description of format MMR-DSR and MMR_FR is given in Appendix A6. 161 AP5-027 A MMR DSR will be registered at the GHRSST-PP MMR for each HR-DDS site that is described in Appendix A5.4. DDS.0060 EXT.DDS.0050 161 AP5-028 A MMR_FR will be generated for each HR-DDS granule and registered at the MMR following the procedure described in Appendix A6.4. DDS.0070 EXT.DDS.0060 A5.4 Location of HR-DDS sites 162- AP5-029 Tables A5.4.1, A5.4.2, A5.4.3 and A5.4.4 describe the locations and formal names of each HR-DDS (v2) site for open NASR 167 ocean, moored buoys, SIMBIOS and other sites respectively © 2004 SOC Page 175 of 193
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Medspiration â System Requirements Document - Data User Element