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HIRAD Imaging of Hurricanes Earl and Karl

Browse images and datasets produced by HIRAD (Hurricane Imaging Radiometer) during the flights for Hurricanes Earl and Karl in September 2010. The images show excess brightness temperatures at 5 GHz, providing valuable geophysical information about the storms.

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HIRAD Imaging of Hurricanes Earl and Karl

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  1. Browse ImagesHIRAD (Hurricane Imaging Radiometer)Timothy L. Miller, NASA/MSFC, P.I.256.961.7882, tim.miller@nasa.govCo-investigators: Linwood Jones (Univ Central Florida), Chris Ruf (Univ Michigan), Eric Uhlhorn (NOAA/AOML/HRD)Team members: Mark James, Peter Black, Courtney Buckley, SayakBiswas, Cathy May, Brent Roberts, Cerese Albers, Lori Schultz, Robert Atlas, James JohnsonImages and datasets produced by Cathy May, Univ. Central Florida Version-0 5 GHz brightness temperatures only 13Sept 2011

  2. HIRAD - GRIP Browse Images v.0 • All images are excess TB in units of Kelvin at 5 GHz • Excess TBis HIRAD observed TB, minus calculated TBfor calm, no-rain ocean surface at the given off-nadir angle. It is preferred in order to eliminate the incidence angle effect, thus enabling easier identification of geophysical features in the data. • HIRAD observed 5 GHz TBis included in the provided datasets but not plotted here • Brightness temperatures for other frequencies and subsequent geophysical retrievals are still being developed at the time of this release (9 Sept 2011) • HIRAD flights for Earl (1-2 Sept) and Karl (16 Sept) are processed • Datasets are provided in Matlab and NETCDF formats and include all necessary information such as time and geographic location of each observation • Earl images are plotted out to +/- 70 degrees from nadir • Karl images are plotted out to +/- 65 degrees from nadir • Legs plotted here and provided in the datasets are for straight and level flight, as determined by constant true heading of the aircraft. • Along-track “striping” on some swaths is indicative of unresolved calibration issues. This feature is eliminated in the directory “filtered”

  3. Hurricane EARLSeptember 1-2, 2010

  4. HIRAD / WB-57 flight track, 1-2 Sept 2010 Start 4 5 3 1 End 6 2 Circles indicate start of leg 1 and end of leg 6

  5. Earl, 2320 UTC, in 85GHz (SSMIS F16, image courtesy NRL)Triangle indicates WB-57/HIRAD position

  6. Earl, 0059 UTC, in 85GHz (SSMIS F18, image courtesy NRL)Triangle indicates WB-57/HIRAD position

  7. EARL storm center information Time frame of EARL legs Observed Storm Centers September 1 – 2, 2010

  8. EARL Leg Times • In the next 3 slides, storm centers as determined by the NOAA P-3 aircraft, given on slide 7, were used to construct a storm-centric coordinate system.

  9. EARL legs, +/- 70 degree swaths Leg-1 Leg 5 Leg 4 Leg 6 Leg 3 Leg 2 Storm-centric Latitude and Longitude

  10. EARL legs 1&3, +/- 70 degree swaths Leg-1 Leg 3 Storm-centric Latitude and Longitude

  11. EARL legs 4&6, +/- 70 degree swaths Leg 4 Leg 6 Storm-centric Latitude and Longitude

  12. EARL Leg 1 +/- 70 degree swath

  13. EARL Leg 2 +/- 70 degree swath

  14. EARL Leg 3 +/- 70 degree swath

  15. EARL Leg 4 +/- 70 degree swath

  16. EARL Leg 5 +/- 70 degree swath

  17. EARL Leg 6 +/- 70 degree swath

  18. Hurricane KARL September 16, 2010

  19. HIRAD / WB-57 flight track and legs definitions End Start 1 8 5 2 10 7 6 4 9 3

  20. KARL 16 Leg Times

  21. Hurricane KARL, September 16, 2010 Subjectively-Determined HIRAD Storm Centers All of the following storm-centric plots use the storm centers observed by HIRAD, as shown above.

  22. KARL legs 2-3-4-5-6, +/- 65 degree swaths Leg 2 Leg 5 Leg 6 Leg 3 Leg 4 Storm-centric Latitude and Longitude

  23. KARL legs 10-9-8-7-6, +/- 65 degree swaths Leg 8 Leg 6 Leg 7 Leg 9 Leg 10 Storm-centric Latitude and Longitude

  24. KARL Leg 2 +/- 65 degree swath HIRAD storm center observation Time: 19:16:49 Lat: 19.74 Lon: -93.38

  25. KARL Leg 3 +/- 65 degree swath

  26. KARL Leg 4 +/- 65 degree swath HIRAD storm center observation Time: 19:52:37 Lat: 19.76 Lon: -93.46

  27. KARL Leg 5 +/- 65 degree swath

  28. KARL Leg 6 +/- 65 degree swath HIRAD storm center observation Time: 20:33:34 Lat: 19.80 Lon: -93.59

  29. KARL Leg 7 +/- 65 degree swath

  30. KARL Leg 8 +/- 65 degree swath HIRAD storm center observation Time: 21:11:51 Lat: 19.82 Lon: -93.67

  31. KARL Leg 9 +/- 65 degree swath

  32. KARL Leg 10 +/- 65 degrees swath HIRAD storm center observation Time: 21:39:55 Lat: 19.79 Lon: -93.74

  33. Sequential Legs • All plots are excess TB at 5GHz, at +/- 65 degrees from nadir. • Sequential plots show the progression of the storm. • The plots use HIRAD observed storm centers to determined storm-centric latitude and longitude.

  34. KARL Leg 2 +/- 65 degree swath

  35. KARL Legs 2,4 +/- 65 degree swath

  36. KARL Legs 4,6 +/- 65 degree swath

  37. KARL Legs 6,8 +/- 65 degree swath

  38. KARL Legs 8,10 +/- 65 degree swath

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