TRMM Microwave Brightness Temperature Progression 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 builds up four days of global TMI 85 GHz measurements. 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.
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Color bar for brightness temperature.
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Credits
Please give credit for this item to:
NASA/Goddard Space Flight Center Scientific Visualization Studio
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Animator
- Horace Mitchell (NASA/GSFC)
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Scientist
- J. Marshall Shepherd (NASA/GSFC)
Release date
This page was originally published on Wednesday, October 19, 2005.
This page was last updated on Sunday, December 15, 2024 at 10:00 PM EST.
Missions
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This page can be found in the following series:Datasets used
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85GHz Brightness Temperature [TRMM: TMI]
ID: 519This dataset can be found at: http://disc.sci.gsfc.nasa.gov/data/datapool/TRMM/01_Data_Products/index.html
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