Browse Images HIRAD (Hurricane Imaging Radiometer) Timothy L. Miller, NASA/MSFC, P.I. 256.961.7882, Co-investigators: Linwood Jones.

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Presentation transcript:

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

HIRAD - GRIP Browse Images v.0 All images are excess T B in units of Kelvin at 5 GHz – Excess T B is HIRAD observed T B, minus calculated T B for 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 T B is 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”

Hurricane EARL September 1-2, 2010

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

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

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

EARL storm center information leg 1 start23:24:11 leg 6 end1:36:22 Time frame of EARL legs Observed Storm Centers September 1 – 2, 2010 DateTimeLatLonSource 9/118:00: Best track 9/123:50: P-3 9/21:13: P-3 9/25:29: C-130

EARL Leg Times LegDateStartStop 19/123:24:1123:41:16 29/123:44:5723:50:47 39/123:52:350:17:39 49/20:33:121:02:46 59/21:04:121:11:47 69/21:13:461:36:22 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.

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

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

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

EARL Leg 1 +/- 70 degree swath

EARL Leg 2 +/- 70 degree swath

EARL Leg 3 +/- 70 degree swath

EARL Leg 4 +/- 70 degree swath

EARL Leg 5 +/- 70 degree swath

EARL Leg 6 +/- 70 degree swath

Hurricane KARL September 16, 2010

HIRAD / WB-57 flight track and legs definitions StartEnd 5 7 9

KARL 16 Leg Times LegDateStartStop 29/1619:01:1419:26:39 39/1619:29:3619:41:46 49/1619:43:5020:06:20 59/1620:08:4120:18:41 69/1620:22:4920:41:59 79/1620:45:5320:55:53 89/1620:58:4721:17:32 99/1621:19:4321:23:53 109/1621:32:3221:50:52

Leg 219:16: Leg 419:52: Leg 620:33: Leg 821:11: Leg 1021:39: 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.

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

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

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

KARL Leg 3 +/- 65 degree swath

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

KARL Leg 5 +/- 65 degree swath

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

KARL Leg 7 +/- 65 degree swath

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

KARL Leg 9 +/- 65 degree swath

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

Sequential Legs All plots are excess T B 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.

KARL Leg 2 +/- 65 degree swath

KARL Legs 2,4 +/- 65 degree swath

KARL Legs 4,6 +/- 65 degree swath

KARL Legs 6,8 +/- 65 degree swath

KARL Legs 8,10 +/- 65 degree swath