Analysis and retracking of continental ice sheet radar altimeter waveforms
The Seasat-1 radar altimeter data set acquired over both the Antarctic and Greenland continental ice sheets is analyzed to obtain corrected ranges to the ice surface. The radar altimeter functional response over the continental ice sheets is considerably more complex than over the oceans. Causal fac...
Main Authors: | , , , |
---|---|
Format: | Other/Unknown Material |
Language: | unknown |
Published: |
1983
|
Subjects: | |
Online Access: | http://ntrs.nasa.gov/search.jsp?R=19830043070 |
id |
ftnasantrs:oai:casi.ntrs.nasa.gov:19830043070 |
---|---|
record_format |
openpolar |
spelling |
ftnasantrs:oai:casi.ntrs.nasa.gov:19830043070 2023-05-15T13:35:32+02:00 Analysis and retracking of continental ice sheet radar altimeter waveforms Martin, T. V. Brenner, A. C. Zwally, H. J. Bindschadler, R. A. Unclassified, Unlimited, Publicly available Feb 28, 1983 http://ntrs.nasa.gov/search.jsp?R=19830043070 unknown http://ntrs.nasa.gov/search.jsp?R=19830043070 Accession ID: 83A24288 Copyright Other Sources 46 Journal of Geophysical Research; 88; Feb. 28 1983 ftnasantrs 2012-02-15T15:27:04Z The Seasat-1 radar altimeter data set acquired over both the Antarctic and Greenland continental ice sheets is analyzed to obtain corrected ranges to the ice surface. The radar altimeter functional response over the continental ice sheets is considerably more complex than over the oceans. Causal factors identified in this complicated response include sloping surfaces, undulating ice surfaces with characteristic wavelengths on the same spatial scale as the altimeter beam-limited footprint, off-track reflections, and dynamic lag of the altimeter tracking circuit. Retracking methods using the altimeter return pulse waveforms give range corrections that are typically several meters. The entire set of Seasat-1 altimetry over the continental ice sheets is being retracked by fitting a multi-parameter function to each waveform. Many waveforms have double ramps indicating near-normal reflections from two distinct portions of the ice surface within the altimeter beam. Two independent range measurements differing by less than 25 m are obtained from retracking the double-ramp waveforms. Other/Unknown Material Antarc* Antarctic Greenland Ice Sheet NASA Technical Reports Server (NTRS) Antarctic The Antarctic Greenland |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
46 |
spellingShingle |
46 Martin, T. V. Brenner, A. C. Zwally, H. J. Bindschadler, R. A. Analysis and retracking of continental ice sheet radar altimeter waveforms |
topic_facet |
46 |
description |
The Seasat-1 radar altimeter data set acquired over both the Antarctic and Greenland continental ice sheets is analyzed to obtain corrected ranges to the ice surface. The radar altimeter functional response over the continental ice sheets is considerably more complex than over the oceans. Causal factors identified in this complicated response include sloping surfaces, undulating ice surfaces with characteristic wavelengths on the same spatial scale as the altimeter beam-limited footprint, off-track reflections, and dynamic lag of the altimeter tracking circuit. Retracking methods using the altimeter return pulse waveforms give range corrections that are typically several meters. The entire set of Seasat-1 altimetry over the continental ice sheets is being retracked by fitting a multi-parameter function to each waveform. Many waveforms have double ramps indicating near-normal reflections from two distinct portions of the ice surface within the altimeter beam. Two independent range measurements differing by less than 25 m are obtained from retracking the double-ramp waveforms. |
format |
Other/Unknown Material |
author |
Martin, T. V. Brenner, A. C. Zwally, H. J. Bindschadler, R. A. |
author_facet |
Martin, T. V. Brenner, A. C. Zwally, H. J. Bindschadler, R. A. |
author_sort |
Martin, T. V. |
title |
Analysis and retracking of continental ice sheet radar altimeter waveforms |
title_short |
Analysis and retracking of continental ice sheet radar altimeter waveforms |
title_full |
Analysis and retracking of continental ice sheet radar altimeter waveforms |
title_fullStr |
Analysis and retracking of continental ice sheet radar altimeter waveforms |
title_full_unstemmed |
Analysis and retracking of continental ice sheet radar altimeter waveforms |
title_sort |
analysis and retracking of continental ice sheet radar altimeter waveforms |
publishDate |
1983 |
url |
http://ntrs.nasa.gov/search.jsp?R=19830043070 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Antarctic The Antarctic Greenland |
geographic_facet |
Antarctic The Antarctic Greenland |
genre |
Antarc* Antarctic Greenland Ice Sheet |
genre_facet |
Antarc* Antarctic Greenland Ice Sheet |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19830043070 Accession ID: 83A24288 |
op_rights |
Copyright |
_version_ |
1766066885721325568 |