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On the use of passive microwaves at 37 GHz in remote sensing of vegetationRecently, a number of studies have investigated the use of the 37 GHz channels of the Nimbus-7 Scanning Multichannel Microwave Radiometer (SMMR) for vegetation monitoring and for studying synergisms between the SMMR and the NOAA Advanced Very High Resolution Radiometer (AVHRR). The approaches are promising but raise a number of issues concerning interpretation of the results, specifically on the relative effects of vegetation and other surface and atmospheric characteristics on the observed signal. This article analyzes the 37 GHz Microwave Polarization Difference Temperature (MPDT) in terms of its sensitivity to surface and atmospheric parameters. For this, a radiative transfer model is used which indicates some limitations of the MPDT index and suggests the importance of accounting for atmospheric effects in the data analysis. An alternative approach to the MPDT, including lower SMMR frequencies than 37 GHz, is discussed.
Document ID
19930072010
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kerr, Y. H.
(Lab. d'Etudes et de Recherches en Teledetection Spatiale Toulouse, France)
Njoku, E. G.
(JPL Pasadena, CA, United States)
Date Acquired
August 16, 2013
Publication Date
July 10, 1993
Publication Information
Publication: International Journal of Remote Sensing
Volume: 14
Issue: 10
ISSN: 0143-1161
Subject Category
Earth Resources And Remote Sensing
Accession Number
93A56007
Distribution Limits
Public
Copyright
Other

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