Intercomparison and validation of SAR-based ice velocity measurement techniques within the Greenland Ice Sheet CCI project
Ice velocity is one of the products associated with the Ice Sheets Essential Climate Variable. This paper describes the intercomparison and validation of ice-velocity measurements carried out by several international research groups within the European Space Agency Greenland Ice Sheet Climate Change...
Published in: | Remote Sensing |
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2018
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Online Access: | https://orbit.dtu.dk/en/publications/0d25f049-245b-4e30-bbce-28ecad09b194 https://doi.org/10.3390/rs10060929 https://backend.orbit.dtu.dk/ws/files/150161124/remotesensing_10_00929_v2.pdf |
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ftdtupubl:oai:pure.atira.dk:publications/0d25f049-245b-4e30-bbce-28ecad09b194 2024-06-23T07:53:14+00:00 Intercomparison and validation of SAR-based ice velocity measurement techniques within the Greenland Ice Sheet CCI project Boncori, John Peter Merryman Andersen, Morten Langer Dall, Jørgen Kusk, Anders Kamstra, Martijn Andersen, Signe Bech Bechor, Noa Bevan, Suzanne Bignami, Christian Gourmelen, Noel Joughin, Ian Jung, Hyung Sup Luckman, Adrian Mouginot, Jeremie Neelmeijer, Julia Rignot, Eric Scharrer, Kilian Nagler, Thomas Scheuchl, Bernd Strozzi, Tazio 2018 application/pdf https://orbit.dtu.dk/en/publications/0d25f049-245b-4e30-bbce-28ecad09b194 https://doi.org/10.3390/rs10060929 https://backend.orbit.dtu.dk/ws/files/150161124/remotesensing_10_00929_v2.pdf eng eng https://orbit.dtu.dk/en/publications/0d25f049-245b-4e30-bbce-28ecad09b194 info:eu-repo/semantics/openAccess Boncori , J P M , Andersen , M L , Dall , J , Kusk , A , Kamstra , M , Andersen , S B , Bechor , N , Bevan , S , Bignami , C , Gourmelen , N , Joughin , I , Jung , H S , Luckman , A , Mouginot , J , Neelmeijer , J , Rignot , E , Scharrer , K , Nagler , T , Scheuchl , B & Strozzi , T 2018 , ' Intercomparison and validation of SAR-based ice velocity measurement techniques within the Greenland Ice Sheet CCI project ' , Remote Sensing , vol. 10 , no. 6 , 929 . https://doi.org/10.3390/rs10060929 Climate Change Initiative Greenland ice sheet Ice velocity Synthetic Aperture Radar /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action article 2018 ftdtupubl https://doi.org/10.3390/rs10060929 2024-06-04T15:19:45Z Ice velocity is one of the products associated with the Ice Sheets Essential Climate Variable. This paper describes the intercomparison and validation of ice-velocity measurements carried out by several international research groups within the European Space Agency Greenland Ice Sheet Climate Change Initiative project, based on space-borne Synthetic Aperture Radar (SAR) data. The goal of this activity was to survey the best SAR-based measurement and error characterization approaches currently in practice. To this end, four experiments were carried out, related to different processing techniques and scenarios, namely differential SAR interferometry, multi aperture SAR interferometry and offset-tracking of incoherent as well as of partially-coherent data. For each task, participants were provided with common datasets covering areas located on the Greenland ice-sheet margin and asked to provide mean velocity maps, quality characterization and a description of processing algorithms and parameters. The results were then intercompared and validated against GPS data, revealing in several cases significant differences in terms of coverage and accuracy. The algorithmic steps and parameters influencing the coverage, accuracy and spatial resolution of the measurements are discussed in detail for each technique, as well as the consistency between quality parameters and validation results. This allows several recommendations to be formulated, in particular concerning procedures which can reduce the impact of analyst decisions, and which are often found to be the cause of sub-optimal algorithm performance. Article in Journal/Newspaper Greenland Ice Sheet Technical University of Denmark: DTU Orbit Greenland Remote Sensing 10 6 929 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Climate Change Initiative Greenland ice sheet Ice velocity Synthetic Aperture Radar /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
spellingShingle |
Climate Change Initiative Greenland ice sheet Ice velocity Synthetic Aperture Radar /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action Boncori, John Peter Merryman Andersen, Morten Langer Dall, Jørgen Kusk, Anders Kamstra, Martijn Andersen, Signe Bech Bechor, Noa Bevan, Suzanne Bignami, Christian Gourmelen, Noel Joughin, Ian Jung, Hyung Sup Luckman, Adrian Mouginot, Jeremie Neelmeijer, Julia Rignot, Eric Scharrer, Kilian Nagler, Thomas Scheuchl, Bernd Strozzi, Tazio Intercomparison and validation of SAR-based ice velocity measurement techniques within the Greenland Ice Sheet CCI project |
topic_facet |
Climate Change Initiative Greenland ice sheet Ice velocity Synthetic Aperture Radar /dk/atira/pure/sustainabledevelopmentgoals/climate_action name=SDG 13 - Climate Action |
description |
Ice velocity is one of the products associated with the Ice Sheets Essential Climate Variable. This paper describes the intercomparison and validation of ice-velocity measurements carried out by several international research groups within the European Space Agency Greenland Ice Sheet Climate Change Initiative project, based on space-borne Synthetic Aperture Radar (SAR) data. The goal of this activity was to survey the best SAR-based measurement and error characterization approaches currently in practice. To this end, four experiments were carried out, related to different processing techniques and scenarios, namely differential SAR interferometry, multi aperture SAR interferometry and offset-tracking of incoherent as well as of partially-coherent data. For each task, participants were provided with common datasets covering areas located on the Greenland ice-sheet margin and asked to provide mean velocity maps, quality characterization and a description of processing algorithms and parameters. The results were then intercompared and validated against GPS data, revealing in several cases significant differences in terms of coverage and accuracy. The algorithmic steps and parameters influencing the coverage, accuracy and spatial resolution of the measurements are discussed in detail for each technique, as well as the consistency between quality parameters and validation results. This allows several recommendations to be formulated, in particular concerning procedures which can reduce the impact of analyst decisions, and which are often found to be the cause of sub-optimal algorithm performance. |
format |
Article in Journal/Newspaper |
author |
Boncori, John Peter Merryman Andersen, Morten Langer Dall, Jørgen Kusk, Anders Kamstra, Martijn Andersen, Signe Bech Bechor, Noa Bevan, Suzanne Bignami, Christian Gourmelen, Noel Joughin, Ian Jung, Hyung Sup Luckman, Adrian Mouginot, Jeremie Neelmeijer, Julia Rignot, Eric Scharrer, Kilian Nagler, Thomas Scheuchl, Bernd Strozzi, Tazio |
author_facet |
Boncori, John Peter Merryman Andersen, Morten Langer Dall, Jørgen Kusk, Anders Kamstra, Martijn Andersen, Signe Bech Bechor, Noa Bevan, Suzanne Bignami, Christian Gourmelen, Noel Joughin, Ian Jung, Hyung Sup Luckman, Adrian Mouginot, Jeremie Neelmeijer, Julia Rignot, Eric Scharrer, Kilian Nagler, Thomas Scheuchl, Bernd Strozzi, Tazio |
author_sort |
Boncori, John Peter Merryman |
title |
Intercomparison and validation of SAR-based ice velocity measurement techniques within the Greenland Ice Sheet CCI project |
title_short |
Intercomparison and validation of SAR-based ice velocity measurement techniques within the Greenland Ice Sheet CCI project |
title_full |
Intercomparison and validation of SAR-based ice velocity measurement techniques within the Greenland Ice Sheet CCI project |
title_fullStr |
Intercomparison and validation of SAR-based ice velocity measurement techniques within the Greenland Ice Sheet CCI project |
title_full_unstemmed |
Intercomparison and validation of SAR-based ice velocity measurement techniques within the Greenland Ice Sheet CCI project |
title_sort |
intercomparison and validation of sar-based ice velocity measurement techniques within the greenland ice sheet cci project |
publishDate |
2018 |
url |
https://orbit.dtu.dk/en/publications/0d25f049-245b-4e30-bbce-28ecad09b194 https://doi.org/10.3390/rs10060929 https://backend.orbit.dtu.dk/ws/files/150161124/remotesensing_10_00929_v2.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
Boncori , J P M , Andersen , M L , Dall , J , Kusk , A , Kamstra , M , Andersen , S B , Bechor , N , Bevan , S , Bignami , C , Gourmelen , N , Joughin , I , Jung , H S , Luckman , A , Mouginot , J , Neelmeijer , J , Rignot , E , Scharrer , K , Nagler , T , Scheuchl , B & Strozzi , T 2018 , ' Intercomparison and validation of SAR-based ice velocity measurement techniques within the Greenland Ice Sheet CCI project ' , Remote Sensing , vol. 10 , no. 6 , 929 . https://doi.org/10.3390/rs10060929 |
op_relation |
https://orbit.dtu.dk/en/publications/0d25f049-245b-4e30-bbce-28ecad09b194 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3390/rs10060929 |
container_title |
Remote Sensing |
container_volume |
10 |
container_issue |
6 |
container_start_page |
929 |
_version_ |
1802644797445373952 |