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...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2020
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-14-1909-2020 https://doaj.org/article/eba9c84f73554e90b57cc4555a565444 |
id |
ftdoajarticles:oai:doaj.org/article:eba9c84f73554e90b57cc4555a565444 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:eba9c84f73554e90b57cc4555a565444 2023-05-15T13:52:27+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 2020-06-01T00:00:00Z https://doi.org/10.5194/tc-14-1909-2020 https://doaj.org/article/eba9c84f73554e90b57cc4555a565444 EN eng Copernicus Publications https://www.the-cryosphere.net/14/1909/2020/tc-14-1909-2020.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-14-1909-2020 1994-0416 1994-0424 https://doaj.org/article/eba9c84f73554e90b57cc4555a565444 The Cryosphere, Vol 14, Pp 1909-1917 (2020) Environmental sciences GE1-350 Geology QE1-996.5 article 2020 ftdoajarticles https://doi.org/10.5194/tc-14-1909-2020 2022-12-31T03:18:33Z 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 Directory of Open Access Journals: DOAJ Articles Antarctic Cartwright ENVELOPE(-57.018,-57.018,53.708,53.708) Greenland South Pole The Antarctic The Cryosphere 14 6 1909 1917 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 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 |
Environmental sciences GE1-350 Geology QE1-996.5 |
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://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 |
https://www.the-cryosphere.net/14/1909/2020/tc-14-1909-2020.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-14-1909-2020 1994-0416 1994-0424 https://doaj.org/article/eba9c84f73554e90b57cc4555a565444 |
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_ |
1766256728504008704 |