7-13 Latency (of The typical time between (i) For satellite data, the (e.g. a complete image) can take 20 minutes to generate. M 3) “observation” reporting) completion of the observation or Hence the latency would be the time between the completion of the image collection, and when it collection of the datum and when is available. Typically this can be 2–3 minutes. Some satellite products such as SST can take about the datum is reported 10 minutes of processing until it is available; (ii) A radar volumetric scan can take 6–10 minutes (in Australia), so the latency would be the time between the completion of the scan and when the data is locally available. In Australia, this varies between a few seconds to several minutes depending on delays in data communications; (iii) AWS data may have a latency of 1–20 seconds (or considerably more in some places) between the completion of the observation and arrival of the data at a central archive. 1 Provided as part of the WIS metadata records Conditions: {7-04}: mandatory for remote sensing observations and mobile platforms in general {7-11}: mandatory for stations/platforms that report a derived observation value that depends on a local datum 8: Specifies the data quality and traceability of the observation Code Id Name Definition Note or example ItemMCO 8-01 Uncertainty of Non-negative parameter, associated NOTE 1: measurement with the result of a measurement, that characterizes the dispersion of
7-13 Latency (of reporting) The typical time between completion of the observation or collection of the datum and when the datum is reported (i) For satellite data, the “observation” (e.g. a complete image) can take 20 minutes to generate. Hence the latency would be the time between the completion of the image collection, and when it is available. Typically this can be 2–3 minutes. Some satellite products such as SST can take about 10 minutes of processing until it is available; (ii) A radar volumetric scan can take 6–10 minutes (in Australia), so the latency would be the time between the completion of the scan and when the data is locally available. In Australia, this varies between a few seconds to several minutes depending on delays in data communications; (iii) AWS data may have a latency of 1–20 seconds (or considerably more in some places) between the completion of the observation and arrival of the data at a central archive. M 3) 1 Provided as part of the WIS metadata records Conditions: {7-04}: mandatory for remote sensing observations and mobile platforms in general {7-11}: mandatory for stations/platforms that report a derived observation value that depends on a local datum 8: Specifies the data quality and traceability of the observation Id Name Definition Note or example Code ItemMCO 8-01 Uncertainty of measurement Non-negative parameter, associated with the result of a measurement, that characterizes the dispersion of NOTE 1:
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