A Modified Semi-Empirical Radar Scattering Model for Weathered Rock Surfaces
This study presents a modified semi-empirical radar scattering model for weathered rough rock surfaces. Weathered rocks generally have dry surfaces except for a few hours after heavy rain due to their rapid drainage compared to bare soils. We find that the dielectric properties of the rocks themselv...
Published in: | Canadian Journal of Remote Sensing |
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2020
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Online Access: | https://doi.org/10.1080/07038992.2019.1711033 https://doaj.org/article/1d3335ded8864605a74a2a1790eee333 |
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ftdoajarticles:oai:doaj.org/article:1d3335ded8864605a74a2a1790eee333 2023-11-12T04:13:13+01:00 A Modified Semi-Empirical Radar Scattering Model for Weathered Rock Surfaces Byung-Hun Choe Gordon R. Osinski Catherine D. Neish Livio L. Tornabene 2020-01-01T00:00:00Z https://doi.org/10.1080/07038992.2019.1711033 https://doaj.org/article/1d3335ded8864605a74a2a1790eee333 EN FR eng fre Taylor & Francis Group http://dx.doi.org/10.1080/07038992.2019.1711033 https://doaj.org/toc/1712-7971 1712-7971 doi:10.1080/07038992.2019.1711033 https://doaj.org/article/1d3335ded8864605a74a2a1790eee333 Canadian Journal of Remote Sensing, Vol 46, Iss 1, Pp 1-14 (2020) Environmental sciences GE1-350 Technology T article 2020 ftdoajarticles https://doi.org/10.1080/07038992.2019.1711033 2023-10-15T00:36:30Z This study presents a modified semi-empirical radar scattering model for weathered rough rock surfaces. Weathered rocks generally have dry surfaces except for a few hours after heavy rain due to their rapid drainage compared to bare soils. We find that the dielectric properties of the rocks themselves and the moisture content of a marginal amount of soil patches in and around the rock surfaces have a negligible effect on radar backscattering. Therefore, radar backscattering from rock surfaces is mainly controlled by surface roughness. Here, we modified the cross-polarization ratio model developed by Oh, which is formulated by only surface roughness parameters with no dependence on soil moisture. Based on LiDAR surface topography data collected from weathered rock surfaces in the Canadian Arctic and corresponding quad-polarimetric RADARSAT-2 synthetic aperture radar (SAR) data, we determined the best fit radar backscattering model for weathered rock surfaces. The modified model was successfully applied to estimate the surface roughness of weathered rock surfaces up to approximately ks = 7 where k is the radar wavenumber (= 2π/λ) and s is the root mean square (RMS) height. This approach avoids the rapid saturation feature observed at ks > 3 in other models. Article in Journal/Newspaper Arctic Directory of Open Access Journals: DOAJ Articles Arctic Canadian Journal of Remote Sensing 46 1 1 14 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English French |
topic |
Environmental sciences GE1-350 Technology T |
spellingShingle |
Environmental sciences GE1-350 Technology T Byung-Hun Choe Gordon R. Osinski Catherine D. Neish Livio L. Tornabene A Modified Semi-Empirical Radar Scattering Model for Weathered Rock Surfaces |
topic_facet |
Environmental sciences GE1-350 Technology T |
description |
This study presents a modified semi-empirical radar scattering model for weathered rough rock surfaces. Weathered rocks generally have dry surfaces except for a few hours after heavy rain due to their rapid drainage compared to bare soils. We find that the dielectric properties of the rocks themselves and the moisture content of a marginal amount of soil patches in and around the rock surfaces have a negligible effect on radar backscattering. Therefore, radar backscattering from rock surfaces is mainly controlled by surface roughness. Here, we modified the cross-polarization ratio model developed by Oh, which is formulated by only surface roughness parameters with no dependence on soil moisture. Based on LiDAR surface topography data collected from weathered rock surfaces in the Canadian Arctic and corresponding quad-polarimetric RADARSAT-2 synthetic aperture radar (SAR) data, we determined the best fit radar backscattering model for weathered rock surfaces. The modified model was successfully applied to estimate the surface roughness of weathered rock surfaces up to approximately ks = 7 where k is the radar wavenumber (= 2π/λ) and s is the root mean square (RMS) height. This approach avoids the rapid saturation feature observed at ks > 3 in other models. |
format |
Article in Journal/Newspaper |
author |
Byung-Hun Choe Gordon R. Osinski Catherine D. Neish Livio L. Tornabene |
author_facet |
Byung-Hun Choe Gordon R. Osinski Catherine D. Neish Livio L. Tornabene |
author_sort |
Byung-Hun Choe |
title |
A Modified Semi-Empirical Radar Scattering Model for Weathered Rock Surfaces |
title_short |
A Modified Semi-Empirical Radar Scattering Model for Weathered Rock Surfaces |
title_full |
A Modified Semi-Empirical Radar Scattering Model for Weathered Rock Surfaces |
title_fullStr |
A Modified Semi-Empirical Radar Scattering Model for Weathered Rock Surfaces |
title_full_unstemmed |
A Modified Semi-Empirical Radar Scattering Model for Weathered Rock Surfaces |
title_sort |
modified semi-empirical radar scattering model for weathered rock surfaces |
publisher |
Taylor & Francis Group |
publishDate |
2020 |
url |
https://doi.org/10.1080/07038992.2019.1711033 https://doaj.org/article/1d3335ded8864605a74a2a1790eee333 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Canadian Journal of Remote Sensing, Vol 46, Iss 1, Pp 1-14 (2020) |
op_relation |
http://dx.doi.org/10.1080/07038992.2019.1711033 https://doaj.org/toc/1712-7971 1712-7971 doi:10.1080/07038992.2019.1711033 https://doaj.org/article/1d3335ded8864605a74a2a1790eee333 |
op_doi |
https://doi.org/10.1080/07038992.2019.1711033 |
container_title |
Canadian Journal of Remote Sensing |
container_volume |
46 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
14 |
_version_ |
1782331335874969600 |