Applying a Composite Pattern Scheme to Clutter Cancellation with the Airborne POLARIS Ice Sounder
The European Space Agency’s (ESA) POLarimetric Airborne Radar Ice Sounder demonstrator (POLARIS) – built, maintained and deployed by the Technical University of Denmark – operates at P-band and features a multi-phase-center antenna for surface clutter suppression. Data for the development and demons...
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ftdlr:oai:elib.dlr.de:85199 2024-05-19T07:32:21+00:00 Applying a Composite Pattern Scheme to Clutter Cancellation with the Airborne POLARIS Ice Sounder Morrison, Keith Bennett, John Scheiber, Rolf 2013-09-09 https://elib.dlr.de/85199/ http://www.igsoc.org/symposia/2013/kansas/proceedings/ unknown Morrison, Keith und Bennett, John und Scheiber, Rolf (2013) Applying a Composite Pattern Scheme to Clutter Cancellation with the Airborne POLARIS Ice Sounder. International Symposium on Radarglaciology, 2013-09-09 - 2013-09-13, Lawrence, Kansas, USA. Institut für Hochfrequenztechnik und Radarsysteme SAR-Technologie Konferenzbeitrag NonPeerReviewed 2013 ftdlr 2024-04-25T00:28:27Z The European Space Agency’s (ESA) POLarimetric Airborne Radar Ice Sounder demonstrator (POLARIS) – built, maintained and deployed by the Technical University of Denmark – operates at P-band and features a multi-phase-center antenna for surface clutter suppression. Data for the development and demonstration of surface clutter cancellation methods were acquired in February 2011 during the IceGrav campaign in Antarctica. The POLARIS radar uses a four-element cross-track antenna to control clutter suppression. The 0.96 m element spacing – 1.4 wavelengths – is significantly greater than the spacing required to avoid grating-lobe ambiguities. The ESA funded the present study to investigate and compare different methods for surface clutter cancellation and to implement a software tool to augment the along-track POLARIS processor developed by the ESA, thus improving bedrock detectability. Within this study, Cranfield University carried out an investigation of the performance of a composite pattern approach to the POLARIS clutter suppression. The scheme exploits the principle of pattern multiplication, whereby the required composite four-element array is produced by the convolution of smaller sub-arrays. This has the advantage that it is computationally much simpler to work with two-element arrays and generate nulls in preferred directions, which are retained in the angular response of the final four-element composite array. Other approaches that consider all four elements need to seek solutions to a set of simultaneous equations. The work considered the performance of the scheme with reference to varying input parameters, which included pulse bandwidth, aircraft roll and cross-track terrain slopes. The work started by recognizing that a four-element array can produce three primary nulls (plus higher-order nulls due to the wide element spacing). A general excitation for this particular case was developed to make best use of all the available information at each array element. The optimum solution was found to have two ... Conference Object Antarc* Antarctica German Aerospace Center: elib - DLR electronic library |
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German Aerospace Center: elib - DLR electronic library |
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Institut für Hochfrequenztechnik und Radarsysteme SAR-Technologie |
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Institut für Hochfrequenztechnik und Radarsysteme SAR-Technologie Morrison, Keith Bennett, John Scheiber, Rolf Applying a Composite Pattern Scheme to Clutter Cancellation with the Airborne POLARIS Ice Sounder |
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Institut für Hochfrequenztechnik und Radarsysteme SAR-Technologie |
description |
The European Space Agency’s (ESA) POLarimetric Airborne Radar Ice Sounder demonstrator (POLARIS) – built, maintained and deployed by the Technical University of Denmark – operates at P-band and features a multi-phase-center antenna for surface clutter suppression. Data for the development and demonstration of surface clutter cancellation methods were acquired in February 2011 during the IceGrav campaign in Antarctica. The POLARIS radar uses a four-element cross-track antenna to control clutter suppression. The 0.96 m element spacing – 1.4 wavelengths – is significantly greater than the spacing required to avoid grating-lobe ambiguities. The ESA funded the present study to investigate and compare different methods for surface clutter cancellation and to implement a software tool to augment the along-track POLARIS processor developed by the ESA, thus improving bedrock detectability. Within this study, Cranfield University carried out an investigation of the performance of a composite pattern approach to the POLARIS clutter suppression. The scheme exploits the principle of pattern multiplication, whereby the required composite four-element array is produced by the convolution of smaller sub-arrays. This has the advantage that it is computationally much simpler to work with two-element arrays and generate nulls in preferred directions, which are retained in the angular response of the final four-element composite array. Other approaches that consider all four elements need to seek solutions to a set of simultaneous equations. The work considered the performance of the scheme with reference to varying input parameters, which included pulse bandwidth, aircraft roll and cross-track terrain slopes. The work started by recognizing that a four-element array can produce three primary nulls (plus higher-order nulls due to the wide element spacing). A general excitation for this particular case was developed to make best use of all the available information at each array element. The optimum solution was found to have two ... |
format |
Conference Object |
author |
Morrison, Keith Bennett, John Scheiber, Rolf |
author_facet |
Morrison, Keith Bennett, John Scheiber, Rolf |
author_sort |
Morrison, Keith |
title |
Applying a Composite Pattern Scheme to Clutter Cancellation with the Airborne POLARIS Ice Sounder |
title_short |
Applying a Composite Pattern Scheme to Clutter Cancellation with the Airborne POLARIS Ice Sounder |
title_full |
Applying a Composite Pattern Scheme to Clutter Cancellation with the Airborne POLARIS Ice Sounder |
title_fullStr |
Applying a Composite Pattern Scheme to Clutter Cancellation with the Airborne POLARIS Ice Sounder |
title_full_unstemmed |
Applying a Composite Pattern Scheme to Clutter Cancellation with the Airborne POLARIS Ice Sounder |
title_sort |
applying a composite pattern scheme to clutter cancellation with the airborne polaris ice sounder |
publishDate |
2013 |
url |
https://elib.dlr.de/85199/ http://www.igsoc.org/symposia/2013/kansas/proceedings/ |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
Morrison, Keith und Bennett, John und Scheiber, Rolf (2013) Applying a Composite Pattern Scheme to Clutter Cancellation with the Airborne POLARIS Ice Sounder. International Symposium on Radarglaciology, 2013-09-09 - 2013-09-13, Lawrence, Kansas, USA. |
_version_ |
1799470357853241344 |