1. SVP-Barometer Drifter Performance Jeffrey Wingenroth VP and General Manager Technocean, Inc. Cape Coral, Florida USA www.technocean.com

2. SVP-Barometer Drifter Performance One of the first manufacturers of satellite-tracked Lagrangian drifting buoys (began in 1983) Technocean, Inc. Early participant in the construction of SVP and SVP-B drifters Currently involved in the design and construction of various drifting buoy types integrating environmental sensors and GPS with Argos Drogue Delivery GPS ArgoDrifter

3. SVP-Barometer Drifter Performance Principal Products ArgoDrifter (also know as CODE, Davis or Sculp)

4. SVP-Barometer Drifter Performance Principal Products Argos Beacons (for moored buoys, SUBS floats, and other)

5. SVP-Barometer Drifter Performance Principal Products SVP and SVP-B Buoys (including the “Mini” drogue)

6. SVP-Barometer Drifter Performance Evaluate historical SVP longevity Evaluate SVP-Barometer longevity (in terms of AP data on GTS) Observe SVP-Barometer AP data quality (in terms of RMS from GTS statistics) Compare Technocean and other commercial SVP-Bs Study Objectives

7. SVP-Barometer Drifter Performance Argos 25755 -Deployed March ‘01 -Recovered in the Falklands in May ‘03

8. SVP-Barometer Drifter Performance The “Beach”!

9. SVP-Barometer Drifter Performance Global Drifter Center Database provides deployment information, type of death, end date, etc. http://www.aoml.noaa.gov/phod/dac/dirall.html (thanks AOML!) Buoy-QC Statistics Archive Provides AP data statistics including RMS values, etc. Enables a determination of when buoy is put on/taken off GTS ftp://ftp.shom.fr/pub/meteo/qc-stats (thanks Meteo-France!) Data Sources (publicly available websites)

10. SVP-Barometer Drifter Performance GDP Database

11. SVP-Barometer Drifter Performance Meteo France GTS Statistics Archive

12. SVP-Barometer Drifter Performance Historical Perspective - Percent Operational After Months Deployed (for ALL buoys in database deployed before 2001)

13. SVP-Barometer Drifter Performance Historical Perspective - Percent Operational After Months Deployed (for ALL buoys in database deployed after 2000)

14. SVP-Barometer Drifter Performance Historical Perspective - Percent Improvement (Between All pre-2001 and post-2000 buoys)

15. SVP-Barometer Drifter Performance Percent Operational and Grounded (or picked up) After Months Deployed (for ALL SVP deployed after 2000)

16. SVP-Barometer Drifter Performance Percent Operational After Months Deployed (for ALL SVP deployed after 2000)

17. SVP-Barometer Drifter Performance Performance Improvement -- Percent Operational After Months Deployed (for ALL SVP by Era)

18. SVP-Barometer Drifter Performance Performance Improvement -- Percent Increase Operational After Months Deployed (for ALL SVP by Era) *from pre-2001 to post-2000 buoys

19. SVP-Barometer Drifter Performance Groundings Buoy Damage resulting from Shipment or Deployment Sensor or Port Failure Manufacturing Defect Unknown (human activity, ice, ?????) Primary Reasons Buoy AP Data Are Removed from GTS (or never placed on after buoy deployment)

20. SVP-Barometer Drifter Performance *from pre-2001 to post-2000 buoys Percent on GTS After Months Deployed (for SVP-B deployed after 2000)

21. SVP-Barometer Drifter Performance Technocean AP Data Quality - Average Monthly RMS values (for Technocean SVP-Bs deployed after 2000)

22. SVP-Barometer Drifter Performance Technocean AP Data Quality - Average Monthly RMS values (for Technocean SVP-Bs deployed after 2000)

23. SVP-Barometer Drifter Performance For all SVPs, operating life has improved ≈15% to 30% between older and newer generations of buoys (for 12 and 24-month periods, respectively) while buoy costs have come down significantly Technocean buoys operated significantly longer than other manufacturers translating to a lower cost per unit of data Technocean has improved buoy performance over time Technocean SVP-Bs stay on the GTS longer Since 2000, Technocean AP data quality has been consistent Summary