Refraction Angle Calculation in Multilayered Ice for Wide-Beam Airborne Radar
We propose an algorithm to calculate the refraction path travelled by a signal from a source to a remote scatterer, through a horizontally parallel multilayer medium with vertical-varying refractive index. The exact solution in a simple two-layered medium requires solving a degree-4 polynomial accor...
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ftucl:oai:eprints.ucl.ac.uk.OAI2:10050052 2023-12-24T10:11:30+01:00 Refraction Angle Calculation in Multilayered Ice for Wide-Beam Airborne Radar Arenas-Pingarron, A Brennan, P Core, H 2018-11-05 text https://discovery.ucl.ac.uk/id/eprint/10050052/1/IGARSS18_aap_4May_2.pdf https://discovery.ucl.ac.uk/id/eprint/10050052/ eng eng IEEE International Geoscience and Remote Sensing Symposium IGARSS2018 https://discovery.ucl.ac.uk/id/eprint/10050052/1/IGARSS18_aap_4May_2.pdf https://discovery.ucl.ac.uk/id/eprint/10050052/ open In: Proceedings of IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium. (pp. pp. 4146-4149). IEEE: Valencia, Spain. (2018) Back-projection radar refraction SAR Snell’s law Proceedings paper 2018 ftucl 2023-11-27T13:07:31Z We propose an algorithm to calculate the refraction path travelled by a signal from a source to a remote scatterer, through a horizontally parallel multilayer medium with vertical-varying refractive index. The exact solution in a simple two-layered medium requires solving a degree-4 polynomial according to Snell's law, meaning a time-demanding solution. For narrow-beam sources a small-angle approximation is commonly used. In this new technique, we transformed the governing equations until the system can be solved by intersection of two curves. As these are monotonic with opposite slope, the crossing point can be estimated by iteration, with a minimum search algorithm. This method has been applied to focus synthetic aperture radar images of the Antarctic bedrock, improving the detected response in the wide-beam case, and reducing time regarding to compute the polynomial solution. Report Antarc* Antarctic University College London: UCL Discovery Antarctic The Antarctic |
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Open Polar |
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University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
English |
topic |
Back-projection radar refraction SAR Snell’s law |
spellingShingle |
Back-projection radar refraction SAR Snell’s law Arenas-Pingarron, A Brennan, P Core, H Refraction Angle Calculation in Multilayered Ice for Wide-Beam Airborne Radar |
topic_facet |
Back-projection radar refraction SAR Snell’s law |
description |
We propose an algorithm to calculate the refraction path travelled by a signal from a source to a remote scatterer, through a horizontally parallel multilayer medium with vertical-varying refractive index. The exact solution in a simple two-layered medium requires solving a degree-4 polynomial according to Snell's law, meaning a time-demanding solution. For narrow-beam sources a small-angle approximation is commonly used. In this new technique, we transformed the governing equations until the system can be solved by intersection of two curves. As these are monotonic with opposite slope, the crossing point can be estimated by iteration, with a minimum search algorithm. This method has been applied to focus synthetic aperture radar images of the Antarctic bedrock, improving the detected response in the wide-beam case, and reducing time regarding to compute the polynomial solution. |
format |
Report |
author |
Arenas-Pingarron, A Brennan, P Core, H |
author_facet |
Arenas-Pingarron, A Brennan, P Core, H |
author_sort |
Arenas-Pingarron, A |
title |
Refraction Angle Calculation in Multilayered Ice for Wide-Beam Airborne Radar |
title_short |
Refraction Angle Calculation in Multilayered Ice for Wide-Beam Airborne Radar |
title_full |
Refraction Angle Calculation in Multilayered Ice for Wide-Beam Airborne Radar |
title_fullStr |
Refraction Angle Calculation in Multilayered Ice for Wide-Beam Airborne Radar |
title_full_unstemmed |
Refraction Angle Calculation in Multilayered Ice for Wide-Beam Airborne Radar |
title_sort |
refraction angle calculation in multilayered ice for wide-beam airborne radar |
publisher |
IEEE |
publishDate |
2018 |
url |
https://discovery.ucl.ac.uk/id/eprint/10050052/1/IGARSS18_aap_4May_2.pdf https://discovery.ucl.ac.uk/id/eprint/10050052/ |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
In: Proceedings of IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium. (pp. pp. 4146-4149). IEEE: Valencia, Spain. (2018) |
op_relation |
https://discovery.ucl.ac.uk/id/eprint/10050052/1/IGARSS18_aap_4May_2.pdf https://discovery.ucl.ac.uk/id/eprint/10050052/ |
op_rights |
open |
_version_ |
1786166035496304640 |