1 / 25

Validation of a CODAR HF-Radar System at the Longterm Ecosystem Observatory

Optimized. Validation of a CODAR HF-Radar System at the Longterm Ecosystem Observatory. ^. Josh T. Kohut Scott M. Glenn John F. Fracassi Robert J. Chant. Dr Jeff Paduan, Dr. Don Barrick, Pete Lilleboe. CODAR Total Vector Calculation. Kilometers. CODAR North.

lloydj
Télécharger la présentation

Validation of a CODAR HF-Radar System at the Longterm Ecosystem Observatory

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Optimized Validation of a CODAR HF-Radar System at the Longterm Ecosystem Observatory ^ Josh T. Kohut Scott M. Glenn John F. Fracassi Robert J. Chant Dr Jeff Paduan, Dr. Don Barrick, Pete Lilleboe

  2. CODAR Total Vector Calculation Kilometers CODAR North 0 5 10 Little Egg Harbor Great Bay LEO-15 A T L A N T I C O C E A N Atlantic City

  3. CODAR Total Vector Calculation Kilometers 0 5 10 Little Egg Harbor Great Bay LEO-15 A T L A N T I C O C E A N CODAR South Atlantic City

  4. CODAR Total Vector Calculation Kilometers CODAR North 0 5 10 Little Egg Harbor CODAR Central Site Great Bay ? LEO-15 A T L A N T I C O C E A N CODAR South Atlantic City

  5. C Radial Velocity Comparison with ADCP C CODAR Site Moored ADCP 25 km A 25 cm/s

  6. 209 210 211 212 213 214 215 216 209 210 211 212 213 214 215 216 Raw Velocity Comparison with ADCP C Northern Site RMS = 7.2 cm/s ADCP CODAR Time (year-day) Southern Site RMS = 9.5 cm/s Time (year-day)

  7. 209 210 211 212 213 214 215 216 209 210 211 212 213 214 215 216 Tidal Velocity Comparison with ADCP C Northern Site RMS = 1.6 cm/s ADCPCODAR Time (year-day) Southern Site RMS = 4.3 cm/s Time (year-day)

  8. A C Radial Velocity Comparison with ADCP A CODAR Site Moored ADCP 25 km A 25 cm/s

  9. Raw Velocity Comparison with ADCP A Northern Site RMS = 19.5 cm/s ADCPCODAR A 200 201 202 203 204 205 206 Time (year-day) Southern Site RMS = 19.6 cm/s 200 201 202 203 204 205 206 Time (year-day)

  10. Role of Antenna Patterns in Signal Direction Determination

  11. Role of Antenna Patterns in Signal Direction Determination Loop 1 Loop 2

  12. Measured vs. Ideal Antenna Patterns

  13. Measured vs. Ideal Antenna Patterns 8 ft Antenna Elements

  14. Measured vs. Ideal Antenna Patterns 4 ft Antenna Elements

  15. Configuration Tests • Ideal Antenna Pattern Assumption (8 foot elements) • Ideal Antenna Pattern Assumption (4 foot elements) • Smoothed Measured Antenna Patterns (4 foot elements) • Measured Antenna Patterns (4 foot elements) • Interpolation (Guassian Fit)

  16. 4 ft Ideal Patterns RMS = 8.6 cm/s R2 = 0.78 NP = 61 Northern Site Antenna Comparisons 8 ft Ideal Patterns RMS = 17.4 cm/s R2 = 0.14 NP = 456

  17. 4 ft Smooth Patterns RMS = 9.0 cm/s R2 = 0.80 NP = 120 Northern Site Antenna Comparisons 4 ft Ideal Patterns RMS = 8.6 cm/s R2 = 0.78 NP = 61

  18. 4 ft Measured Patterns RMS = 8.3 cm/s R2 = 0.84 NP = 114 Northern Site Antenna Comparisons 4 ft Smooth Patterns RMS = 9.0 cm/s R2 = 0.80 NP = 120

  19. 4 ft Interpolated Patterns RMS = 7.9 cm/s R2 = 0.86 NP = 278 Northern Site Antenna Comparisons 4 ft Measured Patterns RMS = 8.3 cm/s R2 = 0.84 NP = 114

  20. 4 ft Ideal Antenna Patterns 90 25 km 25 km 80 70 60 50 40 30 20 10 Northern Site Radial Coverage 8 ft Ideal Antenna Patterns Percent Coverage

  21. 4 ft Measured Patterns 90 25 km 25 km 80 70 60 50 40 30 20 10 Northern Site Radial Coverage 4 ft Ideal Patterns Percent Coverage

  22. 4 ft Interpolated Patterns 90 25 km 25 km 80 70 60 50 40 30 20 10 Northern Site Radial Coverage 4 ft Measured Patterns Percent Coverage

  23. Summary • Validation was angularly dependent prior to system tests • Good comparisons within total vector coverage area • Poor comparisons near the coast • Pattern measurements proved valuable in system optimization • Measured vs. smooth/measured patterns showed no real difference • Interpolation software further optimized the system • Number of data points • Qualtiy of data points

  24. 8 ft Ideal Patterns RMS = 17.4 cm/s R2 = 0.14 NP = 456 4 ft Interpolated Patterns RMS = 7.9 cm/s R2 = 0.86 NP = 278 Summary

  25. 4 ft Interpolated Patterns 8 ft Ideal Patterns 90 25 km 25 km 80 70 60 50 40 30 20 10 Percent Coverage Summary

More Related