NDBC Data Management of IOOS Data Dawn Petraitis, Kevin Kern, and Shannon McArthur National Data Buoy Center Stennis Space Center, MS May 24, 2017 Summary of Topics
Data flow from IOOS data provider to NDBC and GTS Measurements accepted by NDBC Station IDs NDBC XML format Quality Control overview GTS format
Historical data Future work How does data flow from IOOS to NDBC? Measurements accepted by NDBC Meteorological Winds (direction, speed, gust), air temperature, dew
point, relative humidity, barometer, sea surface temperature, wave height, dominant period, mean wave direction, short wave and long wave radiation Oceanographic Sub-surface water temperature and salinity (30 depths) Ocean currents (70 depths/bins)
Dissolved oxygen (near surface and near bottom), turbidity, chlorophyll, tides, pH, EH Waves Directional and non-directional (bulk and spectral) What is needed to send data to NDBC?
Location, station name, and list of measurements Station ID assigned by NDBC Moored buoys and coastal stations require different IDs
FTP account assigned by NDBC Data will be automatically pushed to comms.ndbc.noaa.gov XML format message XML tags to be included will depend on data sent to NDBC
Assignment of Station IDs Moored buoys require a 5-digit WMO ID ID is region-specific Land-based fixed stations require a 5- character alpha-numeric ID ID is from the NWS Location Identifier system Each state has a specific code
All station IDs are assigned by NDBC when we are notified of a new station by the RA/operator Unique IDs are important for distribution on the GTS
XML Format Tags - Met XML Format Tags - Ocean XML Format Tags - TESAC XML Format Tags - Supplemental
XML Format Tags - Missing XML Format Tags Spectral Wave XML Format Tags Spectral Wave Missing XML Message Example Met and Ocean
XML Message Example Spectral Wave Non-directional XML Message Example Spectral Wave Directional
Quality Control of IOOS Data All data is run through automated QC upon receipt NDBC runs QARTOD checks Automated QC Handbook available on NDBC website
http://www.ndbc.noaa.gov/NDBCHandbookofA utomatedDataQualityControl2009.pdf Lists the algorithms used and all flags GTS bulletins are generated after auto QC is complete
Auto QC Flags Hard flags stop data from being distributed on GTS and web Auto QC Flags Soft flags are an
advisory to the data analyst Do not stop data from being distributed Manual Quality Control
NDBC Mission Control Center performs manual QC on a daily basis Reviews all met, wave, and ocean data Report on all daily QC activities sent to partners
Available on NDBC website: http://www.ndbc.noaa.gov/pstat.shtml GTS Data Three types of GTS messages Met, Wave, and Temp/Salinity/Ocean Currents (TESAC)
No limit on frequency to the GTS Some NDBC stations now sending data every 10 minutes Bio/geo/chemical data (oxygen, chlorophyll, pH, etc.) not sent out via GTS
GTS distributes data for use by weather and ocean models and forecasters Other Methods of Data Distribution All data sent to NDBC is displayed on website in real time Tabular ASCII text and graphical format
NetCDF format available on our DODS server http://dods.ndbc.noaa.gov/ Historical Data NDBC does not archive IOOS data with NCEI Maintain historical data records on our
website and on DODS server IOOS Data Availability NDBC sends report to RAs each month Represents the percent of hours each month that an IOOS station reports data to the GTS
Internal reports for message counts and data availability Future Work Change from 5-digit WMO IDs to 7-digit WMO IDs for GTS BUFR format Will not require new WMO IDs for existing
stations Distribute data in BUFR format on GTS BUFR format allows for more metadata Will not change what variables are distributed on GTS unless a new template is released Data Quality Improvement Project
Review our auto and manual QC procedures Work with IOOS Program Office to better quantify the volume of IOOS observations going to the GTS
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