Surface topography in the center of Dronning Maud Land, Antarctica, derived from airborne radar altimetry and ground based kinematic GPS measurements
The knowledge of the surface topography of the ice sheets is an essential boundary condition for estimating mass balances with respect to sea level change and as well paleo climatic reconstruction. Nowadays satellites provide an easy accessible way to derive surface topography on a continental scale...
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ftawi:oai:epic.awi.de:33765 2024-09-15T17:45:20+00:00 Surface topography in the center of Dronning Maud Land, Antarctica, derived from airborne radar altimetry and ground based kinematic GPS measurements Wesche, Christine Eisen, Olaf Helm, Veit Riedel, Sven Rülke, Axel Steinhage, Daniel 2007 https://epic.awi.de/id/eprint/33765/ https://hdl.handle.net/10013/epic.42129 unknown Wesche, C. orcid:0000-0002-9786-4010 , Eisen, O. orcid:0000-0002-6380-962X , Helm, V. orcid:0000-0001-7788-9328 , Riedel, S. , Rülke, A. and Steinhage, D. orcid:0000-0003-4737-9751 (2007) Surface topography in the center of Dronning Maud Land, Antarctica, derived from airborne radar altimetry and ground based kinematic GPS measurements , General Assembly of the European Geosciences Union, Vienna, Austria, 15 April 2007 - 20 April 2007 . hdl:10013/epic.42129 EPIC3General Assembly of the European Geosciences Union, Vienna, Austria, 2007-04-15-2007-04-20 Conference notRev 2007 ftawi 2024-06-24T04:07:26Z The knowledge of the surface topography of the ice sheets is an essential boundary condition for estimating mass balances with respect to sea level change and as well paleo climatic reconstruction. Nowadays satellites provide an easy accessible way to derive surface topography on a continental scale, but they lack either of horizontal resolution (radar satellite altimetry) or horizontal coverage (laser satellite altimetry). For regional surveys airborne altimetry and ground-based kinematic GPS measurements provide both, high horizontal resolution and coverage.We will present a new high resolution digital elevation model (DEM) for central Dronning Maud Land (DML), Antarctica, between 10°W and 20°E and in the south of the coastal mountains up to 80°S, based on airborne altimetry (ARA) and ground-based GPS measurements As the interior of Dronning Maud Land (DML), Antarctica, is a gently inclined region, slope induced error of radar altimetry can be neglected in this flat region. The ground based kinematic GPS measurements were processed with nearby reference stations, precise ephemeris, ionosphere-free solution and the tropospheric model of Niell. The ARA data are a combination of kinematic GPS measurements and radar altimetry; the kinematic GPS data were processed like the ground based data. While determining the surface topography from the GPS and altimeter measurements, the aircraft attitude was taken into account.Because of the short baselines (maximum 26 km), the ground based data derived elevation data with an elevation accuracy of 0.03 m. The along track distance of data point are 2.8 m. To this end, ground based kinematic GPS measurements provide high resolution elevation information. Due to the long baselines (because of the scope of the aircraft) and the penetration of the radar signal into the snow surface, the ARA derived less accurate elevation information than the ground based kinematic GPS measurements. To check the penetration of the radar signal into the surface, we performed a cross-over point ... Conference Object Antarc* Antarctica DML Dronning Maud Land Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
The knowledge of the surface topography of the ice sheets is an essential boundary condition for estimating mass balances with respect to sea level change and as well paleo climatic reconstruction. Nowadays satellites provide an easy accessible way to derive surface topography on a continental scale, but they lack either of horizontal resolution (radar satellite altimetry) or horizontal coverage (laser satellite altimetry). For regional surveys airborne altimetry and ground-based kinematic GPS measurements provide both, high horizontal resolution and coverage.We will present a new high resolution digital elevation model (DEM) for central Dronning Maud Land (DML), Antarctica, between 10°W and 20°E and in the south of the coastal mountains up to 80°S, based on airborne altimetry (ARA) and ground-based GPS measurements As the interior of Dronning Maud Land (DML), Antarctica, is a gently inclined region, slope induced error of radar altimetry can be neglected in this flat region. The ground based kinematic GPS measurements were processed with nearby reference stations, precise ephemeris, ionosphere-free solution and the tropospheric model of Niell. The ARA data are a combination of kinematic GPS measurements and radar altimetry; the kinematic GPS data were processed like the ground based data. While determining the surface topography from the GPS and altimeter measurements, the aircraft attitude was taken into account.Because of the short baselines (maximum 26 km), the ground based data derived elevation data with an elevation accuracy of 0.03 m. The along track distance of data point are 2.8 m. To this end, ground based kinematic GPS measurements provide high resolution elevation information. Due to the long baselines (because of the scope of the aircraft) and the penetration of the radar signal into the snow surface, the ARA derived less accurate elevation information than the ground based kinematic GPS measurements. To check the penetration of the radar signal into the surface, we performed a cross-over point ... |
format |
Conference Object |
author |
Wesche, Christine Eisen, Olaf Helm, Veit Riedel, Sven Rülke, Axel Steinhage, Daniel |
spellingShingle |
Wesche, Christine Eisen, Olaf Helm, Veit Riedel, Sven Rülke, Axel Steinhage, Daniel Surface topography in the center of Dronning Maud Land, Antarctica, derived from airborne radar altimetry and ground based kinematic GPS measurements |
author_facet |
Wesche, Christine Eisen, Olaf Helm, Veit Riedel, Sven Rülke, Axel Steinhage, Daniel |
author_sort |
Wesche, Christine |
title |
Surface topography in the center of Dronning Maud Land, Antarctica, derived from airborne radar altimetry and ground based kinematic GPS measurements |
title_short |
Surface topography in the center of Dronning Maud Land, Antarctica, derived from airborne radar altimetry and ground based kinematic GPS measurements |
title_full |
Surface topography in the center of Dronning Maud Land, Antarctica, derived from airborne radar altimetry and ground based kinematic GPS measurements |
title_fullStr |
Surface topography in the center of Dronning Maud Land, Antarctica, derived from airborne radar altimetry and ground based kinematic GPS measurements |
title_full_unstemmed |
Surface topography in the center of Dronning Maud Land, Antarctica, derived from airborne radar altimetry and ground based kinematic GPS measurements |
title_sort |
surface topography in the center of dronning maud land, antarctica, derived from airborne radar altimetry and ground based kinematic gps measurements |
publishDate |
2007 |
url |
https://epic.awi.de/id/eprint/33765/ https://hdl.handle.net/10013/epic.42129 |
genre |
Antarc* Antarctica DML Dronning Maud Land |
genre_facet |
Antarc* Antarctica DML Dronning Maud Land |
op_source |
EPIC3General Assembly of the European Geosciences Union, Vienna, Austria, 2007-04-15-2007-04-20 |
op_relation |
Wesche, C. orcid:0000-0002-9786-4010 , Eisen, O. orcid:0000-0002-6380-962X , Helm, V. orcid:0000-0001-7788-9328 , Riedel, S. , Rülke, A. and Steinhage, D. orcid:0000-0003-4737-9751 (2007) Surface topography in the center of Dronning Maud Land, Antarctica, derived from airborne radar altimetry and ground based kinematic GPS measurements , General Assembly of the European Geosciences Union, Vienna, Austria, 15 April 2007 - 20 April 2007 . hdl:10013/epic.42129 |
_version_ |
1810493097944023040 |