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TRMM Microwave Brightness Temperature Swath during Hurricane Katrina: Horizontal Polarization
The TMI instrument on the TRMM satellite measures microwaves emitted from the Earth's land and water. By comparing emission from different microwave frequencies, the characteristics of ice and water in the atmosphere can be determined. For example, 85 GHz microwaves are scattered by ice crystals in tropical cyclones, making cyclone rain bands appear 'colder' than the surrounding areas. By comparing 85 GHz temperatures in different polarizations with other frequency band measurements, accurate measurements of rainfall in the atmosphere can be made. This animation shows four days of TMI 85 GHz measurements, one orbit at a time. Hurricane Katrina was in the Gulf of Mexico at the time and clearly shows up in the measurements.

Global horizontally polarized 85GHz microwave brightness temperatures measured by the TMI instrument on TRMM from August 26, 2005 to August 30, 2005, during Hurricane Katrina.    Global horizontally polarized 85GHz microwave brightness temperatures measured by the TMI instrument on TRMM from August 26, 2005 to August 30, 2005, during Hurricane Katrina.
Duration: 38.0 seconds
Available formats:
  1024x256 (29.97 fps) MPEG-1   11 MB
  160x80       PNG           19 KB
  320x80       PNG           26 KB
  80x40         PNG           6 KB
  1024x256   Frames
  640x27       PNG           4 KB
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Color Bar for previous image noted as: Global horizontally polarized 85GHz microwave brightness temperatures measured by the TMI instrument on TRMM from August 26, 2005 to August 30, 2005, during Hurricane Katrina.


Color bar for brightness temperature. 		   Color bar for brightness temperature.

Available formats:
  320 x 90           PNG     972 B

Animation Number:3243
Animator:Horace Mitchell (SVS) (Lead)
Completed:2005-09-12
Scientist:J. Marshall Shepherd (NASA/GSFC)
Instrument:TRMM/TMI
Data set:85GHz Brightness Temperature
Data Collected:2005-08-26T22:45Z - 2005-08-30T22:45Z
Series:WMS
Keywords:
GCMD >> EARTH SCIENCE >> Atmosphere >> Atmospheric Phenomena >> Hurricanes
GCMD >> EARTH SCIENCE >> Atmosphere >> Precipitation >> Rain
GCMD >> EARTH SCIENCE >> Human Dimensions >> Natural Hazards >> Meteorological Hazards
GCMD >> EARTH SCIENCE >> Spectral/Engineering >> Microwave >> Brightness Temperature
More Information on this topic available at:
http://trmm.gsfc.nasa.gov
View Animation in Google Earth Google Earth KML file is available here.
DEPC Metadata is available here.
 
 
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NASA/Goddard Space Flight Center Scientific Visualization Studio


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