Comparison of Doppler-Derived Sea Ice Radial Surface Velocity Measurement Methods From Sentinel-1A IW Data
The near-instantaneous radial velocity of a target can be obtained using the Doppler effect of synthetic aperture radar (SAR), which is widely used in ocean current retrieval. However, in sea ice drift velocity measurements, only a Doppler centroid estimation algorithm in frequency domain has been s...
Published in: | IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
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ftdoajarticles:oai:doaj.org/article:07499e54f501457caa1c5e60d6db144d 2023-05-15T18:17:16+02:00 Comparison of Doppler-Derived Sea Ice Radial Surface Velocity Measurement Methods From Sentinel-1A IW Data Ruifu Wang Wenshuo Zhu Xi Zhang Ya Zhang Junhui Zhu 2023-01-01T00:00:00Z https://doi.org/10.1109/JSTARS.2023.3241978 https://doaj.org/article/07499e54f501457caa1c5e60d6db144d EN eng IEEE https://ieeexplore.ieee.org/document/10035958/ https://doaj.org/toc/2151-1535 2151-1535 doi:10.1109/JSTARS.2023.3241978 https://doaj.org/article/07499e54f501457caa1c5e60d6db144d IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 16, Pp 2178-2191 (2023) Doppler centroid estimation radial surface velocity sea ice drift measurement Sentinel-1A (S1A) Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 article 2023 ftdoajarticles https://doi.org/10.1109/JSTARS.2023.3241978 2023-03-05T01:33:35Z The near-instantaneous radial velocity of a target can be obtained using the Doppler effect of synthetic aperture radar (SAR), which is widely used in ocean current retrieval. However, in sea ice drift velocity measurements, only a Doppler centroid estimation algorithm in frequency domain has been studied, so whether there is a better algorithm is worth exploring. In this article, based on Sentinel-1A interferometric wide data, three Doppler centroid estimation algorithms applied to ocean current retrieval are selected. Combined with the characteristics of the Terrain Observation by Progressive Scans mode, made two applicability adjustments to each algorithm, and finally applied the three algorithms to sea ice radial surface velocity measurements. The first adjustment is to explore and determine the optimal parameters. The second adjustment is to use parallel computing to improve the efficiency, which is improved by an average of 43.55%. In addition, the deviation of Doppler centroid estimation bias correction is verified using rainforest data, and the deviation is controlled at approximately 3 Hz. Based on the three algorithms, five sets of experiments are carried out in this article. By analyzing and comparing the results of each algorithm, it is found that the results of the three algorithms are relatively consistent, among which the correlation Doppler estimation algorithm has the advantages of high efficiency and high precision and is the most suitable method for sea ice drift measurement among the three methods. However, for SAR images with abnormal speckles caused by human activities, the sign Doppler estimation algorithm can effectively remove abnormal speckles and ensure the smoothness of the image with better adaptability. Article in Journal/Newspaper Sea ice Directory of Open Access Journals: DOAJ Articles IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 16 2178 2191 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Doppler centroid estimation radial surface velocity sea ice drift measurement Sentinel-1A (S1A) Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Doppler centroid estimation radial surface velocity sea ice drift measurement Sentinel-1A (S1A) Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 Ruifu Wang Wenshuo Zhu Xi Zhang Ya Zhang Junhui Zhu Comparison of Doppler-Derived Sea Ice Radial Surface Velocity Measurement Methods From Sentinel-1A IW Data |
topic_facet |
Doppler centroid estimation radial surface velocity sea ice drift measurement Sentinel-1A (S1A) Ocean engineering TC1501-1800 Geophysics. Cosmic physics QC801-809 |
description |
The near-instantaneous radial velocity of a target can be obtained using the Doppler effect of synthetic aperture radar (SAR), which is widely used in ocean current retrieval. However, in sea ice drift velocity measurements, only a Doppler centroid estimation algorithm in frequency domain has been studied, so whether there is a better algorithm is worth exploring. In this article, based on Sentinel-1A interferometric wide data, three Doppler centroid estimation algorithms applied to ocean current retrieval are selected. Combined with the characteristics of the Terrain Observation by Progressive Scans mode, made two applicability adjustments to each algorithm, and finally applied the three algorithms to sea ice radial surface velocity measurements. The first adjustment is to explore and determine the optimal parameters. The second adjustment is to use parallel computing to improve the efficiency, which is improved by an average of 43.55%. In addition, the deviation of Doppler centroid estimation bias correction is verified using rainforest data, and the deviation is controlled at approximately 3 Hz. Based on the three algorithms, five sets of experiments are carried out in this article. By analyzing and comparing the results of each algorithm, it is found that the results of the three algorithms are relatively consistent, among which the correlation Doppler estimation algorithm has the advantages of high efficiency and high precision and is the most suitable method for sea ice drift measurement among the three methods. However, for SAR images with abnormal speckles caused by human activities, the sign Doppler estimation algorithm can effectively remove abnormal speckles and ensure the smoothness of the image with better adaptability. |
format |
Article in Journal/Newspaper |
author |
Ruifu Wang Wenshuo Zhu Xi Zhang Ya Zhang Junhui Zhu |
author_facet |
Ruifu Wang Wenshuo Zhu Xi Zhang Ya Zhang Junhui Zhu |
author_sort |
Ruifu Wang |
title |
Comparison of Doppler-Derived Sea Ice Radial Surface Velocity Measurement Methods From Sentinel-1A IW Data |
title_short |
Comparison of Doppler-Derived Sea Ice Radial Surface Velocity Measurement Methods From Sentinel-1A IW Data |
title_full |
Comparison of Doppler-Derived Sea Ice Radial Surface Velocity Measurement Methods From Sentinel-1A IW Data |
title_fullStr |
Comparison of Doppler-Derived Sea Ice Radial Surface Velocity Measurement Methods From Sentinel-1A IW Data |
title_full_unstemmed |
Comparison of Doppler-Derived Sea Ice Radial Surface Velocity Measurement Methods From Sentinel-1A IW Data |
title_sort |
comparison of doppler-derived sea ice radial surface velocity measurement methods from sentinel-1a iw data |
publisher |
IEEE |
publishDate |
2023 |
url |
https://doi.org/10.1109/JSTARS.2023.3241978 https://doaj.org/article/07499e54f501457caa1c5e60d6db144d |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, Vol 16, Pp 2178-2191 (2023) |
op_relation |
https://ieeexplore.ieee.org/document/10035958/ https://doaj.org/toc/2151-1535 2151-1535 doi:10.1109/JSTARS.2023.3241978 https://doaj.org/article/07499e54f501457caa1c5e60d6db144d |
op_doi |
https://doi.org/10.1109/JSTARS.2023.3241978 |
container_title |
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing |
container_volume |
16 |
container_start_page |
2178 |
op_container_end_page |
2191 |
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1766191388527951872 |