Modeling and Measuring Millimeter-Wave Scattering from Snow-Covered Terrain
A radiative transfer model was developed for characterizing radar backscatter from snow- covered ground at millimeter wave-lengths. The model was used to evaluate the radar response to incidence angle, snow depth, snow surface roughness, and snow liquid water content, for both like- and cross-polari...
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ftdtic:ADP006381 2023-05-15T16:37:47+02:00 Modeling and Measuring Millimeter-Wave Scattering from Snow-Covered Terrain Ulaby, Fawwaz T. Kuga, Yasuo Austin, Richard MICHIGAN UNIV ANN ARBOR DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE 1991-09 text/html http://www.dtic.mil/docs/citations/ADP006381 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADP006381 en eng http://www.dtic.mil/docs/citations/ADP006381 Availability: This paper covered by copyright. No copies furnished by DTIC/NTIS. DTIC AND NTIS Active & Passive Radar Detection & Equipment Snow Ice and Permafrost *RADAR *RADIATIVE TRANSFER *SNOW *ANGLE OF INCIDENCE AGREEMENTS ANGLES ANTENNAS BEHAVIOR COMPARISON CONFIGURATIONS CROSS POLARIZATION CYCLES DEPTH EXPERIMENTAL DATA LAYERS LIQUIDS MICHIGAN MILLIMETER WAVES MODELS POLARIZATION PROFILES RESPONSE ROUGHNESS SCATTEROMETERS SEASONS SURFACE ROUGHNESS TILES TRANSFER TRUCKS WATER WINTER BACKSCATTERING DIELECTRIC PROPERTIES SNOW COVER ICE TARGET DETECTION MILITARY EQUIPMENT Remote sensing Text 1991 ftdtic 2016-02-19T17:31:38Z A radiative transfer model was developed for characterizing radar backscatter from snow- covered ground at millimeter wave-lengths. The model was used to evaluate the radar response to incidence angle, snow depth, snow surface roughness, and snow liquid water content, for both like- and cross-polarization configurations. The model behavior was compared with experimental observations made at 35, 95, and 140 GHz, including observations over diurnal cycles. The experimental data were acquired during the 1989 and 1990 winter seasons in Michigan using a truck-mounted millimeter-wave scatterometer system capable of observing the ground surface over a wide range of incidence angles for all linear combinations of transmit and receive antenna polarizations. Comparison of the measured data with model calculations revealed excellent agreement for dry snow as well as when the surface layer of the snowpack was wet. However, when the surface layer was dry and lower layers were wet, the model results were inconsistent with the radar observations. To deal with tile general case wherein the liquid water content exhibits a nonlinear profile with depth, a hybrid numerical-first order solution of the radiative transfer model was developed. This hybrid model provided excellent agreement with the diurnal observations of radar backscatter. This article is from Target and Clutter Scattering and Their Effects on Military Radar Performance (Diffraction par les Cibles et le Fouillis et ses Effets sur les Performances des Radars Militaires ), AD-A244 893, p9-1 thru 9-11. Text Ice permafrost Defense Technical Information Center: DTIC Technical Reports database |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Active & Passive Radar Detection & Equipment Snow Ice and Permafrost *RADAR *RADIATIVE TRANSFER *SNOW *ANGLE OF INCIDENCE AGREEMENTS ANGLES ANTENNAS BEHAVIOR COMPARISON CONFIGURATIONS CROSS POLARIZATION CYCLES DEPTH EXPERIMENTAL DATA LAYERS LIQUIDS MICHIGAN MILLIMETER WAVES MODELS POLARIZATION PROFILES RESPONSE ROUGHNESS SCATTEROMETERS SEASONS SURFACE ROUGHNESS TILES TRANSFER TRUCKS WATER WINTER BACKSCATTERING DIELECTRIC PROPERTIES SNOW COVER ICE TARGET DETECTION MILITARY EQUIPMENT Remote sensing |
spellingShingle |
Active & Passive Radar Detection & Equipment Snow Ice and Permafrost *RADAR *RADIATIVE TRANSFER *SNOW *ANGLE OF INCIDENCE AGREEMENTS ANGLES ANTENNAS BEHAVIOR COMPARISON CONFIGURATIONS CROSS POLARIZATION CYCLES DEPTH EXPERIMENTAL DATA LAYERS LIQUIDS MICHIGAN MILLIMETER WAVES MODELS POLARIZATION PROFILES RESPONSE ROUGHNESS SCATTEROMETERS SEASONS SURFACE ROUGHNESS TILES TRANSFER TRUCKS WATER WINTER BACKSCATTERING DIELECTRIC PROPERTIES SNOW COVER ICE TARGET DETECTION MILITARY EQUIPMENT Remote sensing Ulaby, Fawwaz T. Kuga, Yasuo Austin, Richard Modeling and Measuring Millimeter-Wave Scattering from Snow-Covered Terrain |
topic_facet |
Active & Passive Radar Detection & Equipment Snow Ice and Permafrost *RADAR *RADIATIVE TRANSFER *SNOW *ANGLE OF INCIDENCE AGREEMENTS ANGLES ANTENNAS BEHAVIOR COMPARISON CONFIGURATIONS CROSS POLARIZATION CYCLES DEPTH EXPERIMENTAL DATA LAYERS LIQUIDS MICHIGAN MILLIMETER WAVES MODELS POLARIZATION PROFILES RESPONSE ROUGHNESS SCATTEROMETERS SEASONS SURFACE ROUGHNESS TILES TRANSFER TRUCKS WATER WINTER BACKSCATTERING DIELECTRIC PROPERTIES SNOW COVER ICE TARGET DETECTION MILITARY EQUIPMENT Remote sensing |
description |
A radiative transfer model was developed for characterizing radar backscatter from snow- covered ground at millimeter wave-lengths. The model was used to evaluate the radar response to incidence angle, snow depth, snow surface roughness, and snow liquid water content, for both like- and cross-polarization configurations. The model behavior was compared with experimental observations made at 35, 95, and 140 GHz, including observations over diurnal cycles. The experimental data were acquired during the 1989 and 1990 winter seasons in Michigan using a truck-mounted millimeter-wave scatterometer system capable of observing the ground surface over a wide range of incidence angles for all linear combinations of transmit and receive antenna polarizations. Comparison of the measured data with model calculations revealed excellent agreement for dry snow as well as when the surface layer of the snowpack was wet. However, when the surface layer was dry and lower layers were wet, the model results were inconsistent with the radar observations. To deal with tile general case wherein the liquid water content exhibits a nonlinear profile with depth, a hybrid numerical-first order solution of the radiative transfer model was developed. This hybrid model provided excellent agreement with the diurnal observations of radar backscatter. This article is from Target and Clutter Scattering and Their Effects on Military Radar Performance (Diffraction par les Cibles et le Fouillis et ses Effets sur les Performances des Radars Militaires ), AD-A244 893, p9-1 thru 9-11. |
author2 |
MICHIGAN UNIV ANN ARBOR DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE |
format |
Text |
author |
Ulaby, Fawwaz T. Kuga, Yasuo Austin, Richard |
author_facet |
Ulaby, Fawwaz T. Kuga, Yasuo Austin, Richard |
author_sort |
Ulaby, Fawwaz T. |
title |
Modeling and Measuring Millimeter-Wave Scattering from Snow-Covered Terrain |
title_short |
Modeling and Measuring Millimeter-Wave Scattering from Snow-Covered Terrain |
title_full |
Modeling and Measuring Millimeter-Wave Scattering from Snow-Covered Terrain |
title_fullStr |
Modeling and Measuring Millimeter-Wave Scattering from Snow-Covered Terrain |
title_full_unstemmed |
Modeling and Measuring Millimeter-Wave Scattering from Snow-Covered Terrain |
title_sort |
modeling and measuring millimeter-wave scattering from snow-covered terrain |
publishDate |
1991 |
url |
http://www.dtic.mil/docs/citations/ADP006381 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADP006381 |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADP006381 |
op_rights |
Availability: This paper covered by copyright. No copies furnished by DTIC/NTIS. |
_version_ |
1766028074948755456 |