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...
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| Format: | Article |
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Multidisciplinary Digital Publishing Institute (MDPI)
2018
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| Online Access: | http://hdl.handle.net/1721.1/116583 |
| _version_ | 1826196450953920512 |
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| author | Merryman Boncori, John Peter Langer Andersen, Morten Dall, Jørgen Kusk, Anders Kamstra, Martijn 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 Boncori, John Peter Merryman Andersen, Morten Langer Andersen, Signe Bech Bechor Ben Dov, Noah |
| author2 | Massachusetts Institute of Technology. Earth Resources Laboratory |
| author_facet | Massachusetts Institute of Technology. Earth Resources Laboratory Merryman Boncori, John Peter Langer Andersen, Morten Dall, Jørgen Kusk, Anders Kamstra, Martijn 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 Boncori, John Peter Merryman Andersen, Morten Langer Andersen, Signe Bech Bechor Ben Dov, Noah |
| author_sort | Merryman Boncori, John Peter |
| collection | MIT |
| 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. Keywords: ice velocity; Synthetic Aperture Radar; Greenland ice sheet; Climate Change Initiative |
| first_indexed | 2024-09-23T10:27:04Z |
| format | Article |
| id | mit-1721.1/116583 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T10:27:04Z |
| publishDate | 2018 |
| publisher | Multidisciplinary Digital Publishing Institute (MDPI) |
| record_format | dspace |
| spelling | mit-1721.1/1165832022-09-30T21:13:50Z Intercomparison and Validation of SAR-Based Ice Velocity Measurement Techniques within the Greenland Ice Sheet CCI Project Merryman Boncori, John Peter Langer Andersen, Morten Dall, Jørgen Kusk, Anders Kamstra, Martijn 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 Boncori, John Peter Merryman Andersen, Morten Langer Andersen, Signe Bech Bechor Ben Dov, Noah Massachusetts Institute of Technology. Earth Resources Laboratory Bechor Ben Dov, Noah 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. Keywords: ice velocity; Synthetic Aperture Radar; Greenland ice sheet; Climate Change Initiative 2018-06-25T19:08:04Z 2018-06-25T19:08:04Z 2018-06 2018-05 2018-06-25T07:43:17Z Article http://purl.org/eprint/type/JournalArticle 2072-4292 http://hdl.handle.net/1721.1/116583 Boncori, John Peter Merryman et al. "Intercomparison and Validation of SAR-Based Ice Velocity Measurement Techniques within the Greenland Ice Sheet CCI Project." Remote Sensing 10, 6 (June 2018): 929 © 2018 The Authors http://dx.doi.org/10.3390/rs10060929 Remote Sensing Creative Commons Attribution http://creativecommons.org/licenses/by/4.0/ application/pdf Multidisciplinary Digital Publishing Institute (MDPI) Multidisciplinary Digital Publishing Institute |
| spellingShingle | Merryman Boncori, John Peter Langer Andersen, Morten Dall, Jørgen Kusk, Anders Kamstra, Martijn 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 Boncori, John Peter Merryman Andersen, Morten Langer Andersen, Signe Bech Bechor Ben Dov, Noah Intercomparison and Validation of SAR-Based Ice Velocity Measurement Techniques within the Greenland Ice Sheet CCI Project |
| title | 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_short | 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 |
| url | http://hdl.handle.net/1721.1/116583 |
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