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A Multi-static HF Radar Network for the

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Presentation on theme: "A Multi-static HF Radar Network for the"— Presentation transcript:

1 A Multi-static HF Radar Network for the
New Jersey Shelf Observing System (NJSOS) Josh Kohut and Scott Glenn Rutgers University, USA Don Barrick and Pete Lilleboe CODAR Ocean Sensors Related Talks: Overview of NJSOS (10:40 Wednesday (OI)) Oscar Schofield and Scott Glenn, Rutgers University Glider Component of NJSOS (15:10 Thursday (OI)) Clayton Jones, WEBB Research Technical Aspects of CODAR (16:00 Thursday(AMRS)) Don Barrick, CODAR Ocean Sensors

2 New Jersey Shelf Observing System (NJSOS)

3 CODAR Systems Standard SeaSonde Long-range SeaSonde Bistatic SeaSonde
range : km resolution : km Long-range SeaSonde range : km resolution : km Bistatic SeaSonde range : km – 325 km resolution : km – 6 km

4 Research Area New York Bight

5 Test

6 Standard System Validation Calibration Application

7 Radial Velocity Map Brant Beach Site Brigantine Site Moored ADCP 25 km
25 cm/s

8 Surface Velocity Comparison with ADCP C
July, 1998 Raw Velocity 40 30 20 10 -10 -20 -30 -40 RMS = 7.2 cm/s Velocity (cm/s) ADCP CODAR Time (year-day) 20 15 10 5 -5 -10 -15 -20 Tidal Velocity RMS = 1.6 cm/s Velocity (cm/s) Time (year-day)

9 Coupled With Sea Surface Temperature Satellite Imagery
C l o u d 39:30N 39:15N 74:00W 74:15W Surface Velocities 20 cm/sec Atlantic City Marine Field Station Brigantine Brant Beach T e m p r a t u Celsius 21 22 23 24 25 26 27 Kilometers Copyright 1998, Colon Boy Productions. A B C Great Bay Coastal Ocean RADAR Coupled With Sea Surface Temperature Satellite Imagery

10 Standard System Validation Calibration Application

11 Role of Antenna Patterns in System Calibration

12 Antenna Pattern Distortions
Antenna A Antenna B Loop 1 Loop 2 0.5 0.4 0.3 0.2 0.1 0.0 -0.1 -0.2 -0.3 -0.4 -0.5 Clear Environment 0.5 0.4 0.3 0.2 0.1 0.0 -0.1 -0.2 -0.3 -0.4 -0.5 Cluttered Environment Angle (Degrees From True North)

13 ADCP and CODAR Radial Velocity Comparisons
RMS Difference (cm/s) R2 Calibration None Measured Pattern Kohut, J. T. and S. M. Glenn Calibration of HF radar surface current measurements using measured antenna beam patterns. J. Atmos. Ocean. Tech., Submitted.

14 Standard System Validation Calibration Application

15 Standard System Applications
Adaptive Sampling Model Assimilation Scientific Inquiry Real-time Web Display Search and Rescue Advection of data for vicarious calibration of satellite imagery. Local wave measurements

16 Standard System Applications
Adaptive Sampling Model Assimilation Scientific Inquiry Real-time Web Display Search and Rescue Advection of data for vicarious calibration of satellite imagery. Local wave measurements

17 Stratified Mixed

18 Complex Correlation Correlation Stratified Mixed Wind Stress:
2 m/s 2 m/s Correlation

19 Topography Along-isobath Principle Component dh minimize : dL
minimize : Depth (m) h = depth L = horizontal scale

20 Influence of Gradient Maximim
Topography Influence of Gradient Maximim Angular Offset Depth Gradient (m/km) Angular Offset (degrees) Negative angle : Principle axis right of topography

21 Standard System Applications
Adaptive Sampling Model Assimilation Scientific Inquiry Real-time Web Display Search and Rescue Advection of data for vicarious calibration of satellite imagery. Local wave measurements

22 Search and Rescue

23 CODAR Systems Standard SeaSonde Long-range SeaSonde Bistatic SeaSonde
range : km resolution : km Long-range SeaSonde range : km resolution : km Bistatic SeaSonde range : km – 325 km resolution : km – 6 km

24

25 Long-range System Validation Application

26 M2 Tidal Ellipses

27

28

29 Long-range System Validation Application

30 Long-range System Applications
Adaptive Sampling Model Assimilation Scientific Inquiry Real-time Web Display Search and Rescue Advection of data for vicarious calibration of satellite imagery. Local wave measurements

31 Long-range System Applications
Adaptive Sampling Model Assimilation Scientific Inquiry Real-time Web Display Search and Rescue Advection of data for vicarious calibration of satellite imagery. Local wave measurements Ship Tracking

32 Bragg Peaks from a Moving Transmitter (4.66 MHz)

33 R/V Endeavor Ship Track (December 2001)

34 Tracking the R/V Endeavor December 2, 2001
Solid Lines Are GPS Track; Points Are Radar Track Radial velocity (range rate) from Doppler is most accurate Range quantized in 10 km steps No attempt yet at track precision improvement with Kalman filter algorithm

35 CODAR Systems Standard SeaSonde Long-range SeaSonde Bistatic SeaSonde
range : km resolution : km Long-range SeaSonde range : km resolution : km Bistatic SeaSonde range : km – 325 km resolution : km – 6 km

36 GPS Synchronization : Bistatic
Monostatic HF-Radar Bistatic HF-Radar

37 GPS Synchronization : Bistatic
Shore to Shore November 20, 2000

38 GPS Synchronization : Bistatic
Ship to Shore Monostatic Bistatic

39 R/V Endeavor Cruise Track (12/1/2001 – 12/8/2001)
Standard Bistatic Buoy

40 GPS Synchronization : Bistatic
Buoy to Shore Monostatic Bistatic

41 University of Rhode Island
GPS Synchronization : Bistatic Ship to Shore R/V Endeavor University of Rhode Island

42 R/V Endeavor Cruise Track (12/1/2001 – 12/8/2001)
Standard Bistatic Buoy Long-range Bistatic

43 GPS Synchronization : Bistatic
Ship to Shore

44 Monostatic Systems Bistatic Systems Number of Looks

45 Conclusions Standard and long-range CODARs are an important
component of NJSOS. GPS Synchronization facilitates the development of multi-static HF radar networks. Multi-static HF radar networks will provide multiple looks for surface current, ship tracking, and local wave measurement algorithms for coastal ocean applications.

46 Acknowledgements Coastal Ocean Observation Lab (R.U. COOL)
Sage Lichtenwalner, Liz Creed, Mike Crowley, Clinton Haldeman, Chhaya Mudgal, Kristie Andresen, Louis Bowers Codar Ocean Sensors Brigantine, NJ; Long Beach Township, NJ; National Park Service, United States Coast Guard

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