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TU4.L10 - A REVISED GEOPHYSICAL MODEL FUNCTION FOR THE ADVANCED SCATTEROMETER (ASCAT) AT NOAA/NESDIS
- 1. A Revised Geophysical Model Function for the Advanced Scatterometer (ASCAT) at NOAA/NESDIS Seubson Soisuvarn, Zorana Jelenak, Paul S. Chang, and Qi Zhu NOAA/NESDIS/STAR-UCAR IGARSS 2010, July 25-30, Honolulu, Hawaii, USA
- 5. Measured and Model Sigma0 dependence on wind vector at 30 deg incidence Relative wind direction (Degree) Sigma0 ASCAT/QuikSCAT matchu-ups @ 30 ° incidence 5m/s 9m/s 12m/s 15m/s 17m/s 20m/s CMOD5n B 0 “ True” B 0
- 7. High wind speed B 0 ; Incidence: 50 deg B 0 vs wind speed IWRAP New B 0 U 10Nsat =61.5 m/s vs wind speed U 10Nsat =61.5 m/s New B 0 IWRAP
- 8. CMOD5n vs New B 0 CMOD5n B 0 New B 0 Wind Speed (m/s) B 0 25° 30° 40° 50° 60° 65°
- 9. Sigma0 Model vs. Measurements Measured Sigma0 (dB) Calculated Sigma0 (dB) CMOD5.n New GMF Fore-beam Mid-beam Aft-beam Fore-beam Mid-beam Aft-beam
- 10. ASCAT vs QuikSCAT speed (before) QuikSCAT Wind Speeds ASCAT Wind Speeds Cumulative distribution curve
- 11. ASCAT vs QuikSCAT speed (after) QuikSCAT Wind Speeds ASCAT Wind Speeds Cumulative distribution curve
- 12. ASCAT vs QuikSCAT direction (before) QuikSCAT Wind Directions ASCAT Wind Directions
- 13. ASCAT vs QuikSCAT direction (after) QuikSCAT Wind Directions ASCAT Wind Directions
- 14. Across Swath Speed Biases (before) 2 m/s reference line
- 15. Across Swath Speed Biases (after) 2 m/s reference line
- 16. Across Swath Speed RMS errors (before) 2 m/s reference line
- 17. Across Swath Speed RMS errors (after) 2 m/s reference line
- 18. Operational ASCAT QuikSCAT Mean Wind Speed Field 2007-2009 Winter Seasons - North Pacific
- 19. Mean Wind Speed Field 2007-2009 Winter Seasons - North Pacific New ASCAT QuikSCAT
- 20. 1000km 2000km 3000km Mean Wind Speed Field 2007-2009 Winter Seasons - North Pacific QuikSCAT New ASCAT
- 21. Gale Force Wind Frequency Storm Force Wind Frequency QuikSCAT Gale Force Wind Frequency Storm Force Wind Frequency Operational ASCAT Hurricane Force Wind Frequency Hurricane Force Wind Frequency
- 22. Gale Force Wind Frequency Storm Force Wind Frequency New ASCAT Hurricane Force Wind Frequency Gale Force Wind Frequency Storm Force Wind Frequency Hurricane Force Wind Frequency Operational ASCAT
- 23. Operational ASCAT Sonde Wind Speed 28.8m/s SFMR 28 m/s Operational ASCAT 22 m/s
- 24. New ASCAT Sonde Wind Speed 28.8m/s SFMR 28 m/s New ASCAT 25 m/s
- 26. BACK UP
- 27. Operational wind speed histogram
- 28. New wind speed histogram
- 29. Operational ASCAT KNMI KNMI Mean bias = -3.77 m/s Mean STD = 1.01 m/s
- 30. New ASCAT KNMI KNMI Mean bias = -2.38 m/s Mean STD = 0.98 m/s
- 31. Model vs. Measurement @ 30° incidence CMOD5.n New
- 32. Measured vs CMOD5.n 30 deg
- 33. Measured vs CMOD5.n 40 deg
- 34. Measured vs CMOD5.n 50 deg
- 35. Measured vs CMOD5.n 60 deg
- 37. Hurricane Force Observations ( Oct’07 ~ May’08 ) 212 188 2 39 38 19
- 38. Operational ASCAT wind product detects STORM force wind. One wind warning category lower than the actual winds. North Atlantic Extratropical Storm Example QuikSCAT & New ASCAT wind products detects HF wind. New ASCAT Operational ASCAT QuikSCAT
- 40. Resolution effect Ernesto Rodriguez OVWST meeting 2009
- 41. Smoothing
- 42. B0 vs wind speed
Hinweis der Redaktion
- match iwrap gmf trend and adjust for b0 bias relative ti quikscat/ascat mu
- 3.79 5.06
- Loss of QS Significant reduction in detection capability of HF conditions Will lose 85% of current capability Lose ability to consistently verify HF warnings 3.61 4.51 5.25 0.25