Accuracy assessment and waveform analysis of CryoSat-2 SARIn mode data over Antarctica
The new synthetic aperture radar interferometric (SARIn) measurement mode of CryoSat-2 provides better performance on the rough topography of the ice sheet margins than that of conventional radar altimetry. We assess the accuracy of CryoSat-2 SARIn mode data from Baseline C product of the European S...
Published in: | International Journal of Remote Sensing |
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Online Access: | http://ir.nssc.ac.cn/handle/122/7024 https://doi.org/10.1080/01431161.2019.1610985 |
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ftchinacadscnssc:oai:ir.nssc.ac.cn:122/7024 2023-05-15T13:41:36+02:00 Accuracy assessment and waveform analysis of CryoSat-2 SARIn mode data over Antarctica Wang, Fang Bamber, Jonathan L. Yang, Shuangbao Cheng, Xiao Liu, Shubin Zhang, Youzhi Chi, Yunping 2019 http://ir.nssc.ac.cn/handle/122/7024 https://doi.org/10.1080/01431161.2019.1610985 英语 eng International Journal of Remote Sensing http://ir.nssc.ac.cn/handle/122/7024 doi:10.1080/01431161.2019.1610985 cn.org.cspace.api.content.CopyrightPolicy@6855b5fd 期刊论文 2019 ftchinacadscnssc https://doi.org/10.1080/01431161.2019.1610985 2019-09-21T06:45:18Z The new synthetic aperture radar interferometric (SARIn) measurement mode of CryoSat-2 provides better performance on the rough topography of the ice sheet margins than that of conventional radar altimetry. We assess the accuracy of CryoSat-2 SARIn mode data from Baseline C product of the European Space Agency (ESA), through comparison with two airborne laser altimeters on NASA IceBridge missions. The time difference between two compared data was limited to 30 days resulting in a reduction in the random error of ~0.3 m. We also assess the sensitivity of ESA retracker to surface slope, roughness and firn density using the mean waveform and retracked bin derived from CryoSat-2 Level 1B and Level 2i product. The ESA retracker appears to be sensitive to the surface slope and roughness according to the different leading edge shape and the retracked bin locations, however, not sensitive to the different firn density over four ice shelves. The modelled echo waveforms as SARIn are also used to analyse the impacts of surface characteristics (slope, roughness, and penetration depth) on echo waveform shape. It illustrates that the processes for ESA product fail to differentiate the changes in near-surface dielectric properties and determine radar-signal-penetration depth. © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group. Report Antarc* Antarctica Ice Sheet Ice Shelves National Space Science Center: NSSC OpenIR (Chinese Academy of Sciences) International Journal of Remote Sensing 40 22 8418 8431 |
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National Space Science Center: NSSC OpenIR (Chinese Academy of Sciences) |
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ftchinacadscnssc |
language |
English |
description |
The new synthetic aperture radar interferometric (SARIn) measurement mode of CryoSat-2 provides better performance on the rough topography of the ice sheet margins than that of conventional radar altimetry. We assess the accuracy of CryoSat-2 SARIn mode data from Baseline C product of the European Space Agency (ESA), through comparison with two airborne laser altimeters on NASA IceBridge missions. The time difference between two compared data was limited to 30 days resulting in a reduction in the random error of ~0.3 m. We also assess the sensitivity of ESA retracker to surface slope, roughness and firn density using the mean waveform and retracked bin derived from CryoSat-2 Level 1B and Level 2i product. The ESA retracker appears to be sensitive to the surface slope and roughness according to the different leading edge shape and the retracked bin locations, however, not sensitive to the different firn density over four ice shelves. The modelled echo waveforms as SARIn are also used to analyse the impacts of surface characteristics (slope, roughness, and penetration depth) on echo waveform shape. It illustrates that the processes for ESA product fail to differentiate the changes in near-surface dielectric properties and determine radar-signal-penetration depth. © 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group. |
format |
Report |
author |
Wang, Fang Bamber, Jonathan L. Yang, Shuangbao Cheng, Xiao Liu, Shubin Zhang, Youzhi Chi, Yunping |
spellingShingle |
Wang, Fang Bamber, Jonathan L. Yang, Shuangbao Cheng, Xiao Liu, Shubin Zhang, Youzhi Chi, Yunping Accuracy assessment and waveform analysis of CryoSat-2 SARIn mode data over Antarctica |
author_facet |
Wang, Fang Bamber, Jonathan L. Yang, Shuangbao Cheng, Xiao Liu, Shubin Zhang, Youzhi Chi, Yunping |
author_sort |
Wang, Fang |
title |
Accuracy assessment and waveform analysis of CryoSat-2 SARIn mode data over Antarctica |
title_short |
Accuracy assessment and waveform analysis of CryoSat-2 SARIn mode data over Antarctica |
title_full |
Accuracy assessment and waveform analysis of CryoSat-2 SARIn mode data over Antarctica |
title_fullStr |
Accuracy assessment and waveform analysis of CryoSat-2 SARIn mode data over Antarctica |
title_full_unstemmed |
Accuracy assessment and waveform analysis of CryoSat-2 SARIn mode data over Antarctica |
title_sort |
accuracy assessment and waveform analysis of cryosat-2 sarin mode data over antarctica |
publishDate |
2019 |
url |
http://ir.nssc.ac.cn/handle/122/7024 https://doi.org/10.1080/01431161.2019.1610985 |
genre |
Antarc* Antarctica Ice Sheet Ice Shelves |
genre_facet |
Antarc* Antarctica Ice Sheet Ice Shelves |
op_relation |
International Journal of Remote Sensing http://ir.nssc.ac.cn/handle/122/7024 doi:10.1080/01431161.2019.1610985 |
op_rights |
cn.org.cspace.api.content.CopyrightPolicy@6855b5fd |
op_doi |
https://doi.org/10.1080/01431161.2019.1610985 |
container_title |
International Journal of Remote Sensing |
container_volume |
40 |
container_issue |
22 |
container_start_page |
8418 |
op_container_end_page |
8431 |
_version_ |
1766152899812917248 |