Measuring Geophysical Parameters of the Greenland Ice Sheet using Airborne Radar Altimetry
This paper presents radar-altimeter scattering models for each of the diagenetic zones of the Greenland ice sheet. AAFE radar- altimeter waveforms obtained during the 1991 and 1993 NASA multi-sensor airborne altimetry experiments over Greenland reveal that the Ku-band return pulse changes significan...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19980017810 2023-05-15T16:27:10+02:00 Measuring Geophysical Parameters of the Greenland Ice Sheet using Airborne Radar Altimetry Swift. Calvin T. Ferraro, Ellen J. Unclassified, Unlimited, Publicly available 1995 application/pdf http://hdl.handle.net/2060/19980017810 unknown Document ID: 19980017810 http://hdl.handle.net/2060/19980017810 No Copyright CASI Earth Resources and Remote Sensing NASA/CR-95-207205 NAS 1.26:207205 Journal of Glaciology; 41; 139; 607-617 1995 ftnasantrs 2019-08-31T23:06:14Z This paper presents radar-altimeter scattering models for each of the diagenetic zones of the Greenland ice sheet. AAFE radar- altimeter waveforms obtained during the 1991 and 1993 NASA multi-sensor airborne altimetry experiments over Greenland reveal that the Ku-band return pulse changes significantly with the different diagenetic zones. These changes are due to varying amounts of surface and volume scattering in the return waveform. In the ablation and soaked zones, where surface scattering dominates the AAFE return, geophysical parameters such as rms surface height and rms surface slope are obtained by fitting the waveforms to a surface-scattering model. Waveforms from the percolation zone show that the sub-surface ice features have a much more significant effect on the return pulse than the surrounding snowpack. Model percolation waveforms, created using a combined surface- and volume-scattering model and an ice-feature distribution obtained during the 1993 field season, agree well with actual AAFE waveforms taken in the same time period. Using a combined surface- and volume-scattering model for the dry-snow-zone return waveforms, the rms surface height and slope and the attenuation coefficient of the snowpack are obtained. These scattering models not only allow geophysical parameters of the ice sheet to be measured but also help in the understanding of satellite radar-altimeter data. Other/Unknown Material Greenland Ice Sheet NASA Technical Reports Server (NTRS) Greenland |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
Earth Resources and Remote Sensing |
spellingShingle |
Earth Resources and Remote Sensing Swift. Calvin T. Ferraro, Ellen J. Measuring Geophysical Parameters of the Greenland Ice Sheet using Airborne Radar Altimetry |
topic_facet |
Earth Resources and Remote Sensing |
description |
This paper presents radar-altimeter scattering models for each of the diagenetic zones of the Greenland ice sheet. AAFE radar- altimeter waveforms obtained during the 1991 and 1993 NASA multi-sensor airborne altimetry experiments over Greenland reveal that the Ku-band return pulse changes significantly with the different diagenetic zones. These changes are due to varying amounts of surface and volume scattering in the return waveform. In the ablation and soaked zones, where surface scattering dominates the AAFE return, geophysical parameters such as rms surface height and rms surface slope are obtained by fitting the waveforms to a surface-scattering model. Waveforms from the percolation zone show that the sub-surface ice features have a much more significant effect on the return pulse than the surrounding snowpack. Model percolation waveforms, created using a combined surface- and volume-scattering model and an ice-feature distribution obtained during the 1993 field season, agree well with actual AAFE waveforms taken in the same time period. Using a combined surface- and volume-scattering model for the dry-snow-zone return waveforms, the rms surface height and slope and the attenuation coefficient of the snowpack are obtained. These scattering models not only allow geophysical parameters of the ice sheet to be measured but also help in the understanding of satellite radar-altimeter data. |
format |
Other/Unknown Material |
author |
Swift. Calvin T. Ferraro, Ellen J. |
author_facet |
Swift. Calvin T. Ferraro, Ellen J. |
author_sort |
Swift. Calvin T. |
title |
Measuring Geophysical Parameters of the Greenland Ice Sheet using Airborne Radar Altimetry |
title_short |
Measuring Geophysical Parameters of the Greenland Ice Sheet using Airborne Radar Altimetry |
title_full |
Measuring Geophysical Parameters of the Greenland Ice Sheet using Airborne Radar Altimetry |
title_fullStr |
Measuring Geophysical Parameters of the Greenland Ice Sheet using Airborne Radar Altimetry |
title_full_unstemmed |
Measuring Geophysical Parameters of the Greenland Ice Sheet using Airborne Radar Altimetry |
title_sort |
measuring geophysical parameters of the greenland ice sheet using airborne radar altimetry |
publishDate |
1995 |
url |
http://hdl.handle.net/2060/19980017810 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
CASI |
op_relation |
Document ID: 19980017810 http://hdl.handle.net/2060/19980017810 |
op_rights |
No Copyright |
_version_ |
1766016260200464384 |