NDLI: On the relation between smmr 37-ghz polarization difference and the rainfall over africa and australia

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On the relation between smmr 37-ghz polarization difference and the rainfall over africa and australia

Content Provider	NASA Technical Reports Server (NTRS)
Author	Choudhury, Bhaskar J. Digirolamo, Nicolo E.
Copyright Year	1994
Description	A major difficulty in interpreting coarse resolution satellite data in terms of land surface characteristics is unavailability of spatially and temporally representative ground observations. Under certain conditions rainfall has been found to provide a proxy measure for surface characteristics, and thus a relation between satellite observations and rainfall might provide an indirect approach for relating satellite data to these characteristics. Relationship between rainfall over Africa and Australia and 7-year average (1979-1985) polarization difference (PD) at 37 GHz from scanning multichannel microwave radiometer (SMMR) on board the Nimbus-7 satellite is studied in this paper. Quantitative methods have been used to screen (accept or reject) PD data considering antenna pattern, geolocation uncertainty, water contamination, surface roughness, and adverse effect of drought on the relation between rainfall and surface characteristics. The rainfall data used in the present analysis are climatologic averages and also 1979-1985 averages, and no screening has been applied to this data. The PD data has been screened considering only the location of rainfall stations, without any regard to rainfall amounts. The present analysis confirms a non-linear relation between rainfall and PD published previously.
File Size	3607378
Page Count	88
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19940024905
Archival Resource Key	ark:/13960/t9z08280d
Language	English
Publisher Date	1994-03-01
Access Restriction	Open
Subject Keyword	Meteorology And Climatology Microwave Radiometers Climatology Rain Polarized Electromagnetic Radiation Polarization Characteristics Africa Nimbus 7 Satellite Satellite Observation Australia Earth Surface Hydroclimatology Microwave Emission Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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