COMPARISON OF HELICOPTER-BORNE MEASUREMENTS OF SEA ICE THICKNESS AND SURFACE ROUGHNESS WITH SAR SIGNATURES
Although sea ice thickness is not directly measured by means of radar sensors, its magnitude and variations are to a certain degree reflected by the sea ice surface characteristics. Establishing simple but robust empirical relationships between sea ice surface properties and SAR signatures is an alt...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.380.3386 2023-05-15T18:16:10+02:00 COMPARISON OF HELICOPTER-BORNE MEASUREMENTS OF SEA ICE THICKNESS AND SURFACE ROUGHNESS WITH SAR SIGNATURES Thomas Busche Carola Von Saldern Christian Haas Wolfgang Dierking The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.380.3386 http://earth.esa.int/workshops/salzburg04/papers_posters/4D5_busche_109.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.380.3386 http://earth.esa.int/workshops/salzburg04/papers_posters/4D5_busche_109.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://earth.esa.int/workshops/salzburg04/papers_posters/4D5_busche_109.pdf text ftciteseerx 2016-09-18T00:21:15Z Although sea ice thickness is not directly measured by means of radar sensors, its magnitude and variations are to a certain degree reflected by the sea ice surface characteristics. Establishing simple but robust empirical relationships between sea ice surface properties and SAR signatures is an alternative to a much more complex theoretical microwave modelling approach for sea ice mapping. In this study correlations between helicopter-borne sea ice thickness and roughness measurements and SAR signatures are investigated. Preliminary results from a comparison of a Radarsat-1 scene and sea ice thickness data are presented. The profiles and histograms show a good agreement between SAR backscatter and sea ice thickness, while the correlation coefficient of R 2 = 0.2 indicates a very poor relationship. One source of error considered as the reason for the poor correlation is a remaining co-registration error due to insufficient ice drift data and the immanent sensor accuracies. But as the main source of ambiguity the variety of different scattering mechanisms typical for multiyear ice is discussed. Further analysis of the thickness and the laser roughness data in conjunction with the SAR profiles is planned to identify roughness parameters that are connected to the backscattering behaviour of multiyear sea ice surfaces and indirectly to its thickness. 1. Text Sea ice Unknown |
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English |
description |
Although sea ice thickness is not directly measured by means of radar sensors, its magnitude and variations are to a certain degree reflected by the sea ice surface characteristics. Establishing simple but robust empirical relationships between sea ice surface properties and SAR signatures is an alternative to a much more complex theoretical microwave modelling approach for sea ice mapping. In this study correlations between helicopter-borne sea ice thickness and roughness measurements and SAR signatures are investigated. Preliminary results from a comparison of a Radarsat-1 scene and sea ice thickness data are presented. The profiles and histograms show a good agreement between SAR backscatter and sea ice thickness, while the correlation coefficient of R 2 = 0.2 indicates a very poor relationship. One source of error considered as the reason for the poor correlation is a remaining co-registration error due to insufficient ice drift data and the immanent sensor accuracies. But as the main source of ambiguity the variety of different scattering mechanisms typical for multiyear ice is discussed. Further analysis of the thickness and the laser roughness data in conjunction with the SAR profiles is planned to identify roughness parameters that are connected to the backscattering behaviour of multiyear sea ice surfaces and indirectly to its thickness. 1. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Thomas Busche Carola Von Saldern Christian Haas Wolfgang Dierking |
spellingShingle |
Thomas Busche Carola Von Saldern Christian Haas Wolfgang Dierking COMPARISON OF HELICOPTER-BORNE MEASUREMENTS OF SEA ICE THICKNESS AND SURFACE ROUGHNESS WITH SAR SIGNATURES |
author_facet |
Thomas Busche Carola Von Saldern Christian Haas Wolfgang Dierking |
author_sort |
Thomas Busche |
title |
COMPARISON OF HELICOPTER-BORNE MEASUREMENTS OF SEA ICE THICKNESS AND SURFACE ROUGHNESS WITH SAR SIGNATURES |
title_short |
COMPARISON OF HELICOPTER-BORNE MEASUREMENTS OF SEA ICE THICKNESS AND SURFACE ROUGHNESS WITH SAR SIGNATURES |
title_full |
COMPARISON OF HELICOPTER-BORNE MEASUREMENTS OF SEA ICE THICKNESS AND SURFACE ROUGHNESS WITH SAR SIGNATURES |
title_fullStr |
COMPARISON OF HELICOPTER-BORNE MEASUREMENTS OF SEA ICE THICKNESS AND SURFACE ROUGHNESS WITH SAR SIGNATURES |
title_full_unstemmed |
COMPARISON OF HELICOPTER-BORNE MEASUREMENTS OF SEA ICE THICKNESS AND SURFACE ROUGHNESS WITH SAR SIGNATURES |
title_sort |
comparison of helicopter-borne measurements of sea ice thickness and surface roughness with sar signatures |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.380.3386 http://earth.esa.int/workshops/salzburg04/papers_posters/4D5_busche_109.pdf |
genre |
Sea ice |
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Sea ice |
op_source |
http://earth.esa.int/workshops/salzburg04/papers_posters/4D5_busche_109.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.380.3386 http://earth.esa.int/workshops/salzburg04/papers_posters/4D5_busche_109.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766189615886106624 |