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JHT Project: Operational SFMR-NAWIPS Airborne Processing and Data Distribution Products

This document outlines the operational SFMR-NAWIPS airborne processing and data distribution products for the 2006 Hurricane Season. It includes information on the performance of SFMR, comparisons with GPS, anomalies, limitations, and future steps for refining the SFMR precipitation model.

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JHT Project: Operational SFMR-NAWIPS Airborne Processing and Data Distribution Products

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  1. JHT Project: Operational SFMR-NAWIPS Airborne Processing and Data Distribution Products OUTLINE 2006 Hurricane Season Precipitation Model Next Steps Dr. Peter Black & Eric Uhlhorn NOAA / AOML / HRD Dr. Paul Chang, Dr. Tim Mavor NOAA / NESDIS / ORA Dr. James Carswell Remote Sensing Solutions Acknowledgements NOAA AOC and ProSensing

  2. 2006 Hurricane Season SFMR performed well … • GPS comparison: ~ 1 m/s bias, 3 m/s std dev • Only 11 anomalies noted observed – all explained.

  3. Summary of Anomalies

  4. Rain Model Limitation Rain Induced Anomaly

  5. SFMR Rain Rate Vs. IWRAP Rain Rate Bias (mm/hr) Multiplier Coefficient Error (percentage)

  6. SFMR Rain Rate Vs. IWRAP Wind Speed Bias (knots) Multiplier Coefficient Error (percentage)

  7. IWRAP Measurements • IWRAP Rain Retrievals • Differential Attenuation • Collocated with SFMR • High Resolution Specifications Frequency: C-band & Ku-band Polarization: VV, HH Beam Incidence Angles: 30, 35, 41.5, 50 Altitude Range: 500 – 8000 m Range Resolution: 15, 30, 60 & 120 m Simultaneous, Multi-Beam Doppler/Reflectivity Profiling Conical Scan (60 rpm) Swath Coverage ~ 55 deg. Incidence Proportionallynot to scale.

  8. SFMR Rain Rate Vs. IWRAP Hurricane Rita 22 Sept. 2005 • SFMR Rain Estimates • Under predicts rain rate • by a factor of 2.5 • Offset of 5 mm/hr SFMR Rain Rate (mm/hr) Bin Size: 2.5 mm/hr IWRAP Rain Rate (mm/hr)

  9. Hurricane Isabel: Attenuation Vs. Rain Rate • Corrected SFMR Rain Rate • UMass SFMR • Correction Factor: 2.5 • Offset: 5 mm/hr Rain Specific Attenuation (dB/km) Corrected SFMR Rain Rate (mm/hr)

  10. Precipitation: Next Steps • 2005 IWRAP rain rates. • Development and verification data. • Refine the SFMR precipitation model • (i.e. attenuation power law model). • Validate final SFMR retrievals. • Recommend necessary changes to JHT panel.

  11. Thank You QUESTIONS ?

  12. Ernesto Flights: SFMR Retrievals 29 August 2006 31 August 2006

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