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There are a total of 10 record(s) matching your query.
Sorted by: Date Added To NTRS in Descending order
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SAR terrain classifier and mapper of biophysical attributes
Author(s): Ulaby, Fawwaz T.; Dobson, M. Craig; Pierce, Leland; Sarabandi, Kamal
Abstract: In preparation for the launch of SIR-C/X-SAR and design studies for future orbital SAR, a program has made considerable progress in the development of an SAR terrain classifier and algorithms for quantification of ...
NASA Center: NASA (non Center Specific)
Publication Year: 1993
Added to NTRS: 2008-06-02
Accession Number: 95N23957; Document ID: 19950017537
Radar response of vegetation: An overview
Author(s): Ulaby, Fawwaz T.; Dobson, M. Craig
Abstract: This document contains a number of viewgraphs on surface and vegetation backscattering. A classification of vegetation based on general scattering properties is presented. Radar scattering mechanisms are discussed, and ...
NASA Center: NASA (non Center Specific)
Publication Year: 1993
Added to NTRS: 2008-06-02
Accession Number: 94N15898; Document ID: 19940011425
SIR-B measurements and modeling of vegetation
Author(s): Ulaby, Fawwaz T.; Dobson, M. Craig
Abstract: A summary is presented of the results derived from analysis of six SIR-B data takes over an agricultural test site in west central Illinois. The first part describes the procedure used to calibrate the SIR-B imagery, the ...
NASA Center: NASA (non Center Specific)
Publication Year: 1986
Added to NTRS: 2008-05-29
Accession Number: 87N17160; Document ID: 19870007727
Microwave Dielectric Properties of Soil and Vegetation and Their Estimation From Spaceborne Radar
Author(s): Dobson, M. Craig; McDonald, Kyle C.
Abstract: This paper is largely tutorial in nature and provides an overview of the microwave dielectric properties of certain natural terrestrial media (soils and vegetation) and recent results in estimating these properties remotely ...
NASA Center: Jet Propulsion Laboratory
Publication Year: 1996
Added to NTRS: 2006-12-25
Document ID: 20060036265
Mesoscale monitoring of the soil freeze/thaw boundary from orbital microwave radiometry
Author(s): Ulaby, Fawwaz T.; Dobson, M. Craig; Kuhn, William R.
Abstract: The fundamental objectives are to test the feasibility of delineating the lateral boundary between frozen and thawed condition in the surface layer of soil from orbital microwave radiometry and secondly to examine the ...
NASA Center: NASA (non Center Specific)
Publication Year: 1988
Added to NTRS: 2005-10-13
Accession Number: 88N19855; Document ID: 19880010471; Report Number: NAS 1.26:182659, NASA-CR-182659
Multiband radar characterization of forest biomes
Author(s): Dobson, M. Craig; Ulaby, Fawwaz T.
Abstract: The utility of airborne and orbital SAR in classification, assessment, and monitoring of forest biomes is investigated through analysis of orbital synthetic aperature radar (SAR) and multifrequency and multipolarized ...
NASA Center: NASA (non Center Specific)
Publication Year: 1990
Added to NTRS: 2005-08-25
Accession Number: 91N14638; Document ID: 19910005325; Report Number: NAS 1.26:185101, NASA-CR-185101, UM-022486-1-F
Extended ecosystem signatures with application to Eos synergism requirements
Author(s): Ulaby, Fawwaz T.; Dobson, M. Craig; Sarabandi, Kamal
Abstract: The primary objective is to define the advantages of synergistically combining optical and microwave remote sensing measurements for the determination of biophysical properties important in ecosystem modeling. This objective ...
NASA Center: NASA (non Center Specific)
Publication Year: 1993
Added to NTRS: 2005-08-25
Accession Number: 94N11374; Document ID: 19940006902; Report Number: NAS 1.26:193398, NASA-CR-193398, UMICH-024557-1-F
Polarimetric Radar Observations of Forest State for Determination of Ecosystem Processes
Author(s): Ulaby, Fawwaz T.; Dobson, M. Craig; Sharik, T.
Abstract: The objectives of this research are to test the hypotheses that ecologically significant forest state parameters may be estimated from SAR data. These include estimation of above ground biomass, plant water status, and near ...
NASA Center: Jet Propulsion Laboratory
Publication Year: 1996
Added to NTRS: 2004-11-03
Document ID: 19980015312
Relating the temporal change observed by AIRSAR to surface and canopy properties of mixed conifer and hardwood forests of northern Michigan
Author(s): Dobson, M. Craig; Mcdonald, Kyle; Ulaby, Fawwaz T.; Sharik, Terry
Abstract: The mixed hardwood and conifer forests of northern Michigan were overflown by a 3-frequency airborne imaging radar in Apr. and Jul. 1990. A set of 10 x 10 km test sites near the University of Michigan Biological Station at ...
NASA Center: NASA (non Center Specific)
Publication Year: 1991
Added to NTRS: 2004-11-03
Accession Number: 92N28017; Document ID: 19920018774
The relationship between aboveground biomass and radar backscatter as observed on airborne SAR imagery
Author(s): Kasischke, Eric S.; Bourgeau-Chavez, Laura L.; Christensen, Norman L., Jr.; Dobson, M. Craig
Abstract: The initial results of an experiment to examine the dependence of radar image intensity on total above-ground biomass in a southern US pine forest ecosystem are presented. Two sets of data are discussed. First, we examine ...
NASA Center: NASA (non Center Specific)
Publication Year: 1991
Added to NTRS: 2004-11-03
Accession Number: 92N28015; Document ID: 19920018772
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