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Ship Observation Quality Control (and other updates) at the Ocean Prediction Center LT Christy Schultz Technical Operations Coordinator Ocean Prediction Center 27 August 2015 United States Port Meteorological Officers Meeting
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Overview Importance of ship observations Importance of ship observations Ship observation quality control via CREWWS Ship observation quality control via CREWWS PMO/OPC coordination PMO/OPC coordination
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Location, Location, Location
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CREWSS – QC Software C ollect R eview E dit W eather data (from the) S ea S urface
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CREWSS Flagging Criteria “Quality Control is half science and half art.” - Scott Prosise “Quality Control is half science and half art.” - Scott Prosise
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History file shows 77.7W entered instead of 7.7W
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Update from OPC
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http://www.opc.ncep.noaa.gov/experimental.shtml
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Future Opportunities Anthony.Siebers@noaa.gov Christine.Schultz@noaa.gov
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Auxilliary Slides
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The following slides were generated by Scott Prosise, OPC Senior Marine Forecaster and step through the QC process
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Starting the QC Session – Global view
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Menu Options
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Going to the first observation …
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Observed Model Difference
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Keep or Reject Parameters QC Progress
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History file shows 77.7W entered instead of 7.7W
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10 day history
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Most common human error: Geographical 37N became 77N !
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Means Another digit transposition 42.6N instead of 24.6N
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Observation “repaired” and data saved
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Ship GBTT is flagged for being 4.3 mb too high, … but is it?
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NO! The history file reveals that the Queen Elizabeth 2 is a reliable observer. So…
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The QE2 gets a “keep” flag and the model is told to analyze for the data.
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Data from buoys … Not always perfect, but usually very reliable Average 40+ obs per day Mean of < 1.0
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