Surface Current Mapping in the Lower Chesapeake Bay.

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Presentation transcript:

Surface Current Mapping in the Lower Chesapeake Bay

Study Area & Antenna Sites

Chesapeake Bay Bridge Tunnel (CBBT) Ocean View Community Beach (VIEW) AT OUR FIELD SITES 25.4 MHz CODAR Standard Range Antennas with co-located Tx/Rx MiniMac Field Computers Cell phone/Cable modem connections

Antenna PatternsRadial Coverage CBBT VIEW

Grid for Total Current Vectors 2 km Grid courtesy of CORDC National Network Preserves orthogonality Red points fail stability angle requirements Baseline

Data Products Updated Hourly Sub-tidal FlowTrajectories ( Time Series

Some Q/C Considerations Totals –GDOP/HFR-Progs Matlab toolbox error estimates Radials –Codar spatial and temporal variability statistics within the radial file Both –Visual outliers (check neighboring vectors / apply filter)

Data Validation by Comparison Baseline (consistency check) Tide Moored ADCP Towed ADCP

Baseline Comparisons Ideal antenna patternsMeasured antenna patterns

Tidal Analysis

Moored ADCP Comparison (CH) (TS) (YS) SiteMeanS.Dev Cape Henry Thimble Shoals York Spit Red line = CODAR Blue line = NOAA ADCP Black = |NOAA-CODAR| Difference Statistics

Towed ADCP Comparisons Intensive study at the baseline & comparison with monthly Bay Mouth cruises

Future Plans Incorporate data into GIS; map with other regional spatial data Normal Mode Analysis Continue to work with trajectories/ plume tracking Model comparisons Web page development where totals and time series are freely available for download –Shipping channels –Ocean View beaches Possible vessel tracking ChesROMS model output AVHRR SST Daily Composite, September 24, 2007 from NOAA Coastwatch

Acknowledgements Teresa Garner and Jose Blanco CIT, MACOORA, NOAA CODAR support Advice and assistance from numerous other HF RADAR operators