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Improving the Measurements of High Frequency Radar: Reduced Averaging Times and Bistatics

Learn how reducing averaging times and adding bistatics enhance radar measurements for improved surface current mapping and increased coverage. Study tests show significant accuracy gains with shorter intervals and bistatics.

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Improving the Measurements of High Frequency Radar: Reduced Averaging Times and Bistatics

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  1. Improving the Measurements of High Frequency Radar: Reduced Averaging Times and Bistatics Hugh Roarty, John Kerfoot, Josh Kohut, Scott Glenn Chad Whelan, Max Hubbard

  2. Rutgers University - Coastal Ocean Observation Lab Operations, Research & Education Center Vessels - Satellite Satellite CODAR Ships/ Vessels Glider REMUS Data Vis. Modeling Security Leadership Education Glider Fleet Satellite Data Acquisition Stations CODAR Network 3-D Forecasts

  3. CODAR Compact HF Radar Antennas 25 MHz 13 MHz 5 MHz Separate Transmitter & Receiver Combined Transmitter & Receiver

  4. Surface Current Mapping Capability 25 MHz Radar l: 12 m Ocean l: 6 m Range: 30 km Resolution: 1 km 13 MHz Radar l: 23 m Ocean l: 12 m Range: 80 km Resolution: 3 km 05 MHz Radar l: 60m Ocean l: 30 m Range: 180 km Resolution: 6 km

  5. MARACOOS Annual Mean Surface Currents (2009) Winter Spring Summer Fall

  6. Seasonde processing

  7. Existing SeaSonde Settings SeaSonde Acquisition CSPro Analyze Spectra

  8. 1 CSS  98% 3 CSS  96% 5 CSS  92% 7 CSS  86%

  9. 5 MHz Shorter Averaging Intervals

  10. NAUS NANT BLCK MRCH WILD

  11. Average Radial Velocity RDLi_BRMR_2012_08_1300 RDLi_BRMR_2012_08_1400 RDLi_BRMR_2012_08_1500 5 cm/s 7 cm/s 10 cm/s

  12. Three Hour Average Processing

  13. Next Steps Look at totals between 3 hour and 1 hour files Adjust generation of CSQ and CSS files to measure effects

  14. 13 MHz Bistatics for surface currents

  15. Enhancing the Network with Bistatics 3 radars can provide 6 measurements

  16. Total Surface Currents Three Weeks August 30 – September 20, 2013 6 Radial Stations

  17. Total Surface Currents Three Weeks August 30 – September 20, 2013 6 Radial Stations & 5 Elliptical Pairs

  18. Conclusions • Shorter averaging intervals can increase tidal amplitude measurement • Bistatics increase coverage and reduce uncertainty

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