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First meeting of the Working Group on the Shuttle Microwave Precipitation Radiometer (SMPR)The working group agreed that the first (primary) objective should be the determination of methods for the accurate measurement of total rain water and total cloud water with passive microwave methods. There was no argument on the points concerning nonlinear relationships between T sub B and rain rate (R) over the range of important rain rates (half of oceanic rainfall occurs at rates greater than 15 mm h-1), such that variations in rain rate within a footprint lead to an incorrect measurement of the average rate for that footprint, and one cannot determine the characteristics of the sensed rain area. This is especially true near 18 GHz, where the dynamic range above 15 mm h-1 is very small because this frequency does not clearly fall in either a scattering regime or emissive regime at these wavelengths. It is also not clear whether very low frequency (emissive) techniques will be the best at measuring rain processes, or high frequency (scattering) techniques, where precipitation-size ice plays a major role in the signal attenuation. It is still not known what signal of rain is at certain rates on an observational basis because of the many different conditions that can exist within a single satellite observed footprint.
Document ID
19870003663
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Date Acquired
August 13, 2013
Publication Date
October 1, 1985
Publication Information
Publication: NASA(MSFC FY-85 Atmospheric Processes Research Review
Subject Category
Meteorology And Climatology
Accession Number
87N13096
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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