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Nowcast Products
85 GHz
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Click on the image to view the large picture:
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The SSM/I 85 GHz channel can accurately
retrieve surface information over sea ice (at a higher resolution (16 x
14 km footprint) than the other SSM/I channels) in clear conditions. A
drawback of the use of the 85 GHz channel is that it is quite sensitive
to atmospheric interference from clouds and water vapor. For this reason,
use of 85 GHz channels for sea ice concentration has been limited. This
product uses the polarization difference between the 85 GHz H and V channel
s
to mitigate some of the weather effects and achieve a more defined ice
edge. It also uses the NASA Team 2 algorithm which employs a forward atmos
pheric radiative transfer model with 11 standard climatological atmospheres
to
find a best-fit correction to the SSM/I brightness temperatures. The two
NASA Team weather filters are employed to eliminate spurious ice retrievals
over open water.
If you have any comments, please E-mail the National Ice Center Liaison
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