Medspiration â System Requirements Document - Data User Element
Medspiration â System Requirements Document - Data User Element
Medspiration â System Requirements Document - Data User Element
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<strong>Medspiration</strong> MED-SOC-RS-001_1<br />
<strong>System</strong> <strong>Requirements</strong> <strong>Document</strong> Issue F<br />
Page Table, fig. Reference ID Text from reference documents<br />
50 WP2-075 Most SST data files provide the time at which a SST measurement was acquired but some do not. The GHRSST-PP GDS<br />
SR entry<br />
ING.0070<br />
specifies that the time of measurement should be extracted or computed to the nearest minute and then coded as<br />
continuous UTC time coordinates using the following rules:<br />
50 Rule<br />
WP2-076<br />
Rule 2.1. 2a The time of the earliest SST measurement within this data set should be coded as a continuous time<br />
ING.0080<br />
2.1.2a<br />
coordinate specified as minutes from 00:00:00 UTC January 1, 1981 (start of the useful AVHRR SST data record) and<br />
entered into the netCDF data file global variable Start_Time.<br />
50 Rule<br />
WP2-077<br />
Rule 2.1.1.2b The time of SST measurement should be coded as the deviation in minutes from the netCDF data file global<br />
ING.0090<br />
2.1.1.2b<br />
variable Start_Time and entered into the L2P confidence record variable TimeDeviation.<br />
50 WP-ID2.1.3 Assign fractional sea ice value if required<br />
50 WP2-078 Some SST data are contaminated in part or wholly by sea ice. This procedure is used to set the L2P confidence data<br />
record variable FractionalSeaIce defined in Table A1.2.2 in Appendix A1.<br />
MRG.0070<br />
MRG.0080<br />
MRG.0090<br />
50 WP2-079 Some input SST data streams provide a flag to indicate that the SST measurement is contaminated by sea ice (e.g.,<br />
MRG.0090<br />
AMSR-E). In cases where no such data are present in the input data stream a reference sea ice data product (defined in<br />
Appendix A3) should be used to assess the likelihood of sea ice contamination. The GDS specifies the following rules:<br />
50 Rule<br />
WP2-080<br />
Rule 2.1.3a If an input data set pixel fractional sea ice estimate exists, this should be used to set the FractionalSeaIce<br />
MRG.0070<br />
2.1.3a<br />
flag of the L2P confidence data record.<br />
50 Rule<br />
WP2-081<br />
Rule 2.1.3b If an input data set pixel sea ice flag exists (i.e. indicating sea ice but not ther fractional amount of coverage),<br />
MRG.0080<br />
2.1.3b<br />
this should be used to set the FractionalSeaIce flag of the L2P confidence data record to 100% according to the code<br />
values defined in Table A1.4.2 in Appendix A1. If the flag is a binary flag. a check should be made against the reference<br />
fractional sea Ice data set to determine if the pixel is likely to be 100% contaminated and the fraction reported by the<br />
reference data set should be set if it is < 100%.<br />
© 2004 SOC Page 139 of 193