Satellite Radar Interferometry for Monitoring Ice-Sheet Motion: Application to an Antarctic Ice Stream
As a new means of monitoring the flow velocities and grounding-line positions of ice streams, which are indicators of response of the Antarctic and Greenland ice sheets to climatic change or internal instability, the method of satellite radar interferometry (SRI) is here proposed and applied to the...
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ftnasajpl:oai:trs.jpl.nasa.gov:2014/35606 2023-05-15T13:46:47+02:00 Satellite Radar Interferometry for Monitoring Ice-Sheet Motion: Application to an Antarctic Ice Stream Goldstein, R. M. Engelhardt, H. Kamb, B. Frolich, R. M. 2004-10-06T04:08:41Z 1608967 bytes application/pdf http://hdl.handle.net/2014/35606 en_US eng Science 93-1327 http://hdl.handle.net/2014/35606 2004 ftnasajpl 2021-12-23T13:15:07Z As a new means of monitoring the flow velocities and grounding-line positions of ice streams, which are indicators of response of the Antarctic and Greenland ice sheets to climatic change or internal instability, the method of satellite radar interferometry (SRI) is here proposed and applied to the Rutford Ice Stream, Antarctica. The method uses phase comparison of the radar signal obtained for a pair of SAR images taken a few days apart to plot an interferogram which directly displays relative ground motions that have occurred in the time interval between images. The detection limit is about 1.5 mm for vertical motions and about 4 mm for horizontal motions in the radar beam direction. In the Rutford Ice Stream, SRI velocities agree fairly well with earlier ground-truth data over a longitudinal interval of 29 km; the comparison suggests a secular decrease in velocity of about 2 percent from 1978-80 to 1992. Other/Unknown Material Antarc* Antarctic Antarctica Greenland Ice Sheet Rutford Ice Stream JPL Technical Report Server Antarctic Greenland Rutford ENVELOPE(-85.300,-85.300,-78.600,-78.600) Rutford Ice Stream ENVELOPE(-80.000,-80.000,-79.167,-79.167) The Antarctic |
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Open Polar |
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JPL Technical Report Server |
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ftnasajpl |
language |
English |
description |
As a new means of monitoring the flow velocities and grounding-line positions of ice streams, which are indicators of response of the Antarctic and Greenland ice sheets to climatic change or internal instability, the method of satellite radar interferometry (SRI) is here proposed and applied to the Rutford Ice Stream, Antarctica. The method uses phase comparison of the radar signal obtained for a pair of SAR images taken a few days apart to plot an interferogram which directly displays relative ground motions that have occurred in the time interval between images. The detection limit is about 1.5 mm for vertical motions and about 4 mm for horizontal motions in the radar beam direction. In the Rutford Ice Stream, SRI velocities agree fairly well with earlier ground-truth data over a longitudinal interval of 29 km; the comparison suggests a secular decrease in velocity of about 2 percent from 1978-80 to 1992. |
author |
Goldstein, R. M. Engelhardt, H. Kamb, B. Frolich, R. M. |
spellingShingle |
Goldstein, R. M. Engelhardt, H. Kamb, B. Frolich, R. M. Satellite Radar Interferometry for Monitoring Ice-Sheet Motion: Application to an Antarctic Ice Stream |
author_facet |
Goldstein, R. M. Engelhardt, H. Kamb, B. Frolich, R. M. |
author_sort |
Goldstein, R. M. |
title |
Satellite Radar Interferometry for Monitoring Ice-Sheet Motion: Application to an Antarctic Ice Stream |
title_short |
Satellite Radar Interferometry for Monitoring Ice-Sheet Motion: Application to an Antarctic Ice Stream |
title_full |
Satellite Radar Interferometry for Monitoring Ice-Sheet Motion: Application to an Antarctic Ice Stream |
title_fullStr |
Satellite Radar Interferometry for Monitoring Ice-Sheet Motion: Application to an Antarctic Ice Stream |
title_full_unstemmed |
Satellite Radar Interferometry for Monitoring Ice-Sheet Motion: Application to an Antarctic Ice Stream |
title_sort |
satellite radar interferometry for monitoring ice-sheet motion: application to an antarctic ice stream |
publishDate |
2004 |
url |
http://hdl.handle.net/2014/35606 |
long_lat |
ENVELOPE(-85.300,-85.300,-78.600,-78.600) ENVELOPE(-80.000,-80.000,-79.167,-79.167) |
geographic |
Antarctic Greenland Rutford Rutford Ice Stream The Antarctic |
geographic_facet |
Antarctic Greenland Rutford Rutford Ice Stream The Antarctic |
genre |
Antarc* Antarctic Antarctica Greenland Ice Sheet Rutford Ice Stream |
genre_facet |
Antarc* Antarctic Antarctica Greenland Ice Sheet Rutford Ice Stream |
op_relation |
Science 93-1327 http://hdl.handle.net/2014/35606 |
_version_ |
1766245201181933568 |