Improved GNSS-R bi-static altimetry and independent digital elevation models of Greenland and Antarctica from TechDemoSat-1
Improved digital elevation models (DEMs) of the Antarctic and Greenland ice sheets are presented, which have been derived from Global Navigation Satellite Systems-Reflectometry (GNSS-R). This builds on a previous study (Cartwright et al., 2018) using GNSS-R to derive an Antarctic DEM but uses improv...
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Online Access: | https://doi.org/10.5194/tc-14-1909-2020 https://www.the-cryosphere.net/14/1909/2020/tc-14-1909-2020.pdf https://doaj.org/article/eba9c84f73554e90b57cc4555a565444 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:eba9c84f73554e90b57cc4555a565444 2023-05-15T13:56:01+02:00 Improved GNSS-R bi-static altimetry and independent digital elevation models of Greenland and Antarctica from TechDemoSat-1 J. Cartwright C. J. Banks M. Srokosz 2020-06-01 https://doi.org/10.5194/tc-14-1909-2020 https://www.the-cryosphere.net/14/1909/2020/tc-14-1909-2020.pdf https://doaj.org/article/eba9c84f73554e90b57cc4555a565444 en eng Copernicus Publications doi:10.5194/tc-14-1909-2020 1994-0416 1994-0424 https://www.the-cryosphere.net/14/1909/2020/tc-14-1909-2020.pdf https://doaj.org/article/eba9c84f73554e90b57cc4555a565444 undefined The Cryosphere, Vol 14, Pp 1909-1917 (2020) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2020 fttriple https://doi.org/10.5194/tc-14-1909-2020 2023-01-22T19:12:34Z Improved digital elevation models (DEMs) of the Antarctic and Greenland ice sheets are presented, which have been derived from Global Navigation Satellite Systems-Reflectometry (GNSS-R). This builds on a previous study (Cartwright et al., 2018) using GNSS-R to derive an Antarctic DEM but uses improved processing and an additional 13 months of measurements, totalling 46 months of data from the UK TechDemoSat-1 satellite. A median bias of under 10 m and root-mean-square errors (RMSEs) of under 53 m for the Antarctic and 166 m for Greenland are obtained, as compared to existing DEMs. The results represent, compared to the earlier study, a halving of the median bias to 9 m, an improvement in coverage of 18 %, and a 4 times higher spatial resolution (now gridded at 25 km). In addition, these are the first published satellite altimetry measurements of the region surrounding the South Pole. Comparisons south of 88∘ S yield RMSEs of less than 33 m when compared to NASA's Operation IceBridge measurements. Differences between DEMs are explored, the limitations of the technique are noted, and the future potential of GNSS-R for glacial ice studies is discussed. Article in Journal/Newspaper Antarc* Antarctic Antarctica Greenland South pole South pole The Cryosphere Unknown Antarctic Cartwright ENVELOPE(-57.018,-57.018,53.708,53.708) Greenland South Pole The Antarctic The Cryosphere 14 6 1909 1917 |
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geo envir J. Cartwright C. J. Banks M. Srokosz Improved GNSS-R bi-static altimetry and independent digital elevation models of Greenland and Antarctica from TechDemoSat-1 |
topic_facet |
geo envir |
description |
Improved digital elevation models (DEMs) of the Antarctic and Greenland ice sheets are presented, which have been derived from Global Navigation Satellite Systems-Reflectometry (GNSS-R). This builds on a previous study (Cartwright et al., 2018) using GNSS-R to derive an Antarctic DEM but uses improved processing and an additional 13 months of measurements, totalling 46 months of data from the UK TechDemoSat-1 satellite. A median bias of under 10 m and root-mean-square errors (RMSEs) of under 53 m for the Antarctic and 166 m for Greenland are obtained, as compared to existing DEMs. The results represent, compared to the earlier study, a halving of the median bias to 9 m, an improvement in coverage of 18 %, and a 4 times higher spatial resolution (now gridded at 25 km). In addition, these are the first published satellite altimetry measurements of the region surrounding the South Pole. Comparisons south of 88∘ S yield RMSEs of less than 33 m when compared to NASA's Operation IceBridge measurements. Differences between DEMs are explored, the limitations of the technique are noted, and the future potential of GNSS-R for glacial ice studies is discussed. |
format |
Article in Journal/Newspaper |
author |
J. Cartwright C. J. Banks M. Srokosz |
author_facet |
J. Cartwright C. J. Banks M. Srokosz |
author_sort |
J. Cartwright |
title |
Improved GNSS-R bi-static altimetry and independent digital elevation models of Greenland and Antarctica from TechDemoSat-1 |
title_short |
Improved GNSS-R bi-static altimetry and independent digital elevation models of Greenland and Antarctica from TechDemoSat-1 |
title_full |
Improved GNSS-R bi-static altimetry and independent digital elevation models of Greenland and Antarctica from TechDemoSat-1 |
title_fullStr |
Improved GNSS-R bi-static altimetry and independent digital elevation models of Greenland and Antarctica from TechDemoSat-1 |
title_full_unstemmed |
Improved GNSS-R bi-static altimetry and independent digital elevation models of Greenland and Antarctica from TechDemoSat-1 |
title_sort |
improved gnss-r bi-static altimetry and independent digital elevation models of greenland and antarctica from techdemosat-1 |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/tc-14-1909-2020 https://www.the-cryosphere.net/14/1909/2020/tc-14-1909-2020.pdf https://doaj.org/article/eba9c84f73554e90b57cc4555a565444 |
long_lat |
ENVELOPE(-57.018,-57.018,53.708,53.708) |
geographic |
Antarctic Cartwright Greenland South Pole The Antarctic |
geographic_facet |
Antarctic Cartwright Greenland South Pole The Antarctic |
genre |
Antarc* Antarctic Antarctica Greenland South pole South pole The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctica Greenland South pole South pole The Cryosphere |
op_source |
The Cryosphere, Vol 14, Pp 1909-1917 (2020) |
op_relation |
doi:10.5194/tc-14-1909-2020 1994-0416 1994-0424 https://www.the-cryosphere.net/14/1909/2020/tc-14-1909-2020.pdf https://doaj.org/article/eba9c84f73554e90b57cc4555a565444 |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-14-1909-2020 |
container_title |
The Cryosphere |
container_volume |
14 |
container_issue |
6 |
container_start_page |
1909 |
op_container_end_page |
1917 |
_version_ |
1766263236889411584 |