Monitoring glaciers and indications of subglacial volcanic activity using small-scale Top-Hat reflectors - An IsViews experiment on Myrdalsjökull, Iceland
Subglacial volcanic eruptions often provide indications of activity some time before the actual catastrophic event. Surface undulations appear on top of the ice cap and meltwater torrents can occur at the glacier margin. Even large scale uplifts of ice caps have been observed.Within the project IsVi...
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ftdlr:oai:elib.dlr.de:93215 2024-05-19T07:40:45+00:00 Monitoring glaciers and indications of subglacial volcanic activity using small-scale Top-Hat reflectors - An IsViews experiment on Myrdalsjökull, Iceland Minet, Christian Duque Biarge, Sergi Jaenicke, Julia Münzer, Ulrich Mayer, Christoph Franke, Jonas Gudmundsson, Agust Parizzi, Alessandro Fritz, Thomas Eineder, Michael 2014-05 application/pdf https://elib.dlr.de/93215/ https://elib.dlr.de/93215/1/Minet_EGU2014_Korr2pdf.pdf http://meetingorganizer.copernicus.org/EGU2014/EGU2014-4945-5.pdf en eng Copernicus https://elib.dlr.de/93215/1/Minet_EGU2014_Korr2pdf.pdf Minet, Christian und Duque Biarge, Sergi und Jaenicke, Julia und Münzer, Ulrich und Mayer, Christoph und Franke, Jonas und Gudmundsson, Agust und Parizzi, Alessandro und Fritz, Thomas und Eineder, Michael (2014) Monitoring glaciers and indications of subglacial volcanic activity using small-scale Top-Hat reflectors - An IsViews experiment on Myrdalsjökull, Iceland. In: Geophysical Research Abstracts 2014 (EGU2014), 16. Copernicus. EGU General Assembly 2014, 2014-04-28 - 2014-05-02, Wien, Österreich. SAR-Signalverarbeitung Konferenzbeitrag NonPeerReviewed 2014 ftdlr 2024-04-25T00:31:44Z Subglacial volcanic eruptions often provide indications of activity some time before the actual catastrophic event. Surface undulations appear on top of the ice cap and meltwater torrents can occur at the glacier margin. Even large scale uplifts of ice caps have been observed.Within the project IsViews a processing chain, based on high spatially and temporally resolved remote sensing imagery, will be developed in order to automatically identify such early indications. The main data used for this analysis are acquired by the TerraSAR-X, TanDEM-X and RapidEye satellites. First investigations concerning the feasibility of the near real-time warning system and the general baseline conditions are carried out on two large plateau glaciers in southern Iceland, namely Mýrdalsjökull and Vatnajökull. Within the 2013 IsViews field work an experiment was started in order to test a new way of glacier monitoring. Two test sites were established on the Mýrdalsjökull ice cap (one at the equilibrium line and one below), each consisting of a permanent GPS station and two nearby RADAR reflectors. These RADAR reflectors are specially designed Top-Hat reflectors, which are cheap to manufacture, small (50 cm diameter) and lightweight and therefore easy to handle, transport and deploy. Their special design makes them visible in SAR images independent of orientation, so different acquisition geometries and even different sensors can be used. The drawback of the small, low reflecting Top-Hat can be overcome by using the newly implemented Staring Spotlight Mode of the German SAR Satellite TerraSAR-X, providing an unprecedented resolution of down to 20 cm in the azimuth direction. The reflectors, as point targets, allow absolute positioning within the cm-level in the TerraSAR-X data. Time series of SAR data can be used to derive position and altitude changes of the reflector itself and possibly even melting rates by exploiting the different signal paths. The visibility of the Top-Hat reflectors has been confirmed in various test ... Conference Object glacier Ice cap Iceland Mýrdalsjökull Vatnajökull German Aerospace Center: elib - DLR electronic library |
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Open Polar |
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German Aerospace Center: elib - DLR electronic library |
op_collection_id |
ftdlr |
language |
English |
topic |
SAR-Signalverarbeitung |
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SAR-Signalverarbeitung Minet, Christian Duque Biarge, Sergi Jaenicke, Julia Münzer, Ulrich Mayer, Christoph Franke, Jonas Gudmundsson, Agust Parizzi, Alessandro Fritz, Thomas Eineder, Michael Monitoring glaciers and indications of subglacial volcanic activity using small-scale Top-Hat reflectors - An IsViews experiment on Myrdalsjökull, Iceland |
topic_facet |
SAR-Signalverarbeitung |
description |
Subglacial volcanic eruptions often provide indications of activity some time before the actual catastrophic event. Surface undulations appear on top of the ice cap and meltwater torrents can occur at the glacier margin. Even large scale uplifts of ice caps have been observed.Within the project IsViews a processing chain, based on high spatially and temporally resolved remote sensing imagery, will be developed in order to automatically identify such early indications. The main data used for this analysis are acquired by the TerraSAR-X, TanDEM-X and RapidEye satellites. First investigations concerning the feasibility of the near real-time warning system and the general baseline conditions are carried out on two large plateau glaciers in southern Iceland, namely Mýrdalsjökull and Vatnajökull. Within the 2013 IsViews field work an experiment was started in order to test a new way of glacier monitoring. Two test sites were established on the Mýrdalsjökull ice cap (one at the equilibrium line and one below), each consisting of a permanent GPS station and two nearby RADAR reflectors. These RADAR reflectors are specially designed Top-Hat reflectors, which are cheap to manufacture, small (50 cm diameter) and lightweight and therefore easy to handle, transport and deploy. Their special design makes them visible in SAR images independent of orientation, so different acquisition geometries and even different sensors can be used. The drawback of the small, low reflecting Top-Hat can be overcome by using the newly implemented Staring Spotlight Mode of the German SAR Satellite TerraSAR-X, providing an unprecedented resolution of down to 20 cm in the azimuth direction. The reflectors, as point targets, allow absolute positioning within the cm-level in the TerraSAR-X data. Time series of SAR data can be used to derive position and altitude changes of the reflector itself and possibly even melting rates by exploiting the different signal paths. The visibility of the Top-Hat reflectors has been confirmed in various test ... |
format |
Conference Object |
author |
Minet, Christian Duque Biarge, Sergi Jaenicke, Julia Münzer, Ulrich Mayer, Christoph Franke, Jonas Gudmundsson, Agust Parizzi, Alessandro Fritz, Thomas Eineder, Michael |
author_facet |
Minet, Christian Duque Biarge, Sergi Jaenicke, Julia Münzer, Ulrich Mayer, Christoph Franke, Jonas Gudmundsson, Agust Parizzi, Alessandro Fritz, Thomas Eineder, Michael |
author_sort |
Minet, Christian |
title |
Monitoring glaciers and indications of subglacial volcanic activity using small-scale Top-Hat reflectors - An IsViews experiment on Myrdalsjökull, Iceland |
title_short |
Monitoring glaciers and indications of subglacial volcanic activity using small-scale Top-Hat reflectors - An IsViews experiment on Myrdalsjökull, Iceland |
title_full |
Monitoring glaciers and indications of subglacial volcanic activity using small-scale Top-Hat reflectors - An IsViews experiment on Myrdalsjökull, Iceland |
title_fullStr |
Monitoring glaciers and indications of subglacial volcanic activity using small-scale Top-Hat reflectors - An IsViews experiment on Myrdalsjökull, Iceland |
title_full_unstemmed |
Monitoring glaciers and indications of subglacial volcanic activity using small-scale Top-Hat reflectors - An IsViews experiment on Myrdalsjökull, Iceland |
title_sort |
monitoring glaciers and indications of subglacial volcanic activity using small-scale top-hat reflectors - an isviews experiment on myrdalsjökull, iceland |
publisher |
Copernicus |
publishDate |
2014 |
url |
https://elib.dlr.de/93215/ https://elib.dlr.de/93215/1/Minet_EGU2014_Korr2pdf.pdf http://meetingorganizer.copernicus.org/EGU2014/EGU2014-4945-5.pdf |
genre |
glacier Ice cap Iceland Mýrdalsjökull Vatnajökull |
genre_facet |
glacier Ice cap Iceland Mýrdalsjökull Vatnajökull |
op_relation |
https://elib.dlr.de/93215/1/Minet_EGU2014_Korr2pdf.pdf Minet, Christian und Duque Biarge, Sergi und Jaenicke, Julia und Münzer, Ulrich und Mayer, Christoph und Franke, Jonas und Gudmundsson, Agust und Parizzi, Alessandro und Fritz, Thomas und Eineder, Michael (2014) Monitoring glaciers and indications of subglacial volcanic activity using small-scale Top-Hat reflectors - An IsViews experiment on Myrdalsjökull, Iceland. In: Geophysical Research Abstracts 2014 (EGU2014), 16. Copernicus. EGU General Assembly 2014, 2014-04-28 - 2014-05-02, Wien, Österreich. |
_version_ |
1799480331779178496 |