The limiting resolution of ice-sheet elevations derived from pulse-limited satellite altimetry
Abstract The problem of improving the spatial resolution of ice-sheet elevations derived from satellite-altimeter observations is investigated theoretically in two dimensions. An equation for the echo is described that allows the elevation to be determined In linear operations on the echo. An approx...
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Language: | English |
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Cambridge University Press (CUP)
1995
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Online Access: | http://dx.doi.org/10.1017/s0022143000016282 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000016282 |
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crcambridgeupr:10.1017/s0022143000016282 2024-06-23T07:53:46+00:00 The limiting resolution of ice-sheet elevations derived from pulse-limited satellite altimetry Wingham, D.J. 1995 http://dx.doi.org/10.1017/s0022143000016282 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000016282 en eng Cambridge University Press (CUP) Journal of Glaciology volume 41, issue 138, page 413-422 ISSN 0022-1430 1727-5652 journal-article 1995 crcambridgeupr https://doi.org/10.1017/s0022143000016282 2024-06-05T04:03:16Z Abstract The problem of improving the spatial resolution of ice-sheet elevations derived from satellite-altimeter observations is investigated theoretically in two dimensions. An equation for the echo is described that allows the elevation to be determined In linear operations on the echo. An approximate solution of the equation is explored to illustrate the behaviour of the solution. The modifications necessary to consider a regularly sampled solution are described and the effects of echo fluctuations on the reconstructed surface are considered. Numerical examples are described. It is shown that, in general terms, the resolution may be limited by sampling or by echo fluctuations but that in the case of current practical measurements it is the sampling that determines the resolution. This resolution is smaller than has been considered possible hitherto. Limitations of the method are discussed together with extensions to a wider class of problems including three-dimensional reconstructions. Article in Journal/Newspaper Ice Sheet Journal of Glaciology Cambridge University Press Journal of Glaciology 41 138 413 422 |
institution |
Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract The problem of improving the spatial resolution of ice-sheet elevations derived from satellite-altimeter observations is investigated theoretically in two dimensions. An equation for the echo is described that allows the elevation to be determined In linear operations on the echo. An approximate solution of the equation is explored to illustrate the behaviour of the solution. The modifications necessary to consider a regularly sampled solution are described and the effects of echo fluctuations on the reconstructed surface are considered. Numerical examples are described. It is shown that, in general terms, the resolution may be limited by sampling or by echo fluctuations but that in the case of current practical measurements it is the sampling that determines the resolution. This resolution is smaller than has been considered possible hitherto. Limitations of the method are discussed together with extensions to a wider class of problems including three-dimensional reconstructions. |
format |
Article in Journal/Newspaper |
author |
Wingham, D.J. |
spellingShingle |
Wingham, D.J. The limiting resolution of ice-sheet elevations derived from pulse-limited satellite altimetry |
author_facet |
Wingham, D.J. |
author_sort |
Wingham, D.J. |
title |
The limiting resolution of ice-sheet elevations derived from pulse-limited satellite altimetry |
title_short |
The limiting resolution of ice-sheet elevations derived from pulse-limited satellite altimetry |
title_full |
The limiting resolution of ice-sheet elevations derived from pulse-limited satellite altimetry |
title_fullStr |
The limiting resolution of ice-sheet elevations derived from pulse-limited satellite altimetry |
title_full_unstemmed |
The limiting resolution of ice-sheet elevations derived from pulse-limited satellite altimetry |
title_sort |
limiting resolution of ice-sheet elevations derived from pulse-limited satellite altimetry |
publisher |
Cambridge University Press (CUP) |
publishDate |
1995 |
url |
http://dx.doi.org/10.1017/s0022143000016282 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000016282 |
genre |
Ice Sheet Journal of Glaciology |
genre_facet |
Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology volume 41, issue 138, page 413-422 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000016282 |
container_title |
Journal of Glaciology |
container_volume |
41 |
container_issue |
138 |
container_start_page |
413 |
op_container_end_page |
422 |
_version_ |
1802645585992351744 |