Improved Ice Velocity Measurements with Sentinel-1 TOPS Interferometry

Research output: Contribution to journalJournal articleResearchpeer-review

Standard

Improved Ice Velocity Measurements with Sentinel-1 TOPS Interferometry. / Andersen, Jonas Kvist; Kusk, Anders; Boncori, John Peter Merryman; Hvidberg, Christine Schott; Grinsted, Aslak.

In: Remote Sensing, Vol. 12, No. 12, 2014, 23.06.2020.

Research output: Contribution to journalJournal articleResearchpeer-review

Harvard

Andersen, JK, Kusk, A, Boncori, JPM, Hvidberg, CS & Grinsted, A 2020, 'Improved Ice Velocity Measurements with Sentinel-1 TOPS Interferometry', Remote Sensing, vol. 12, no. 12, 2014. https://doi.org/10.3390/rs12122014

APA

Andersen, J. K., Kusk, A., Boncori, J. P. M., Hvidberg, C. S., & Grinsted, A. (2020). Improved Ice Velocity Measurements with Sentinel-1 TOPS Interferometry. Remote Sensing, 12(12), [2014]. https://doi.org/10.3390/rs12122014

Vancouver

Andersen JK, Kusk A, Boncori JPM, Hvidberg CS, Grinsted A. Improved Ice Velocity Measurements with Sentinel-1 TOPS Interferometry. Remote Sensing. 2020 Jun 23;12(12). 2014. https://doi.org/10.3390/rs12122014

Author

Andersen, Jonas Kvist ; Kusk, Anders ; Boncori, John Peter Merryman ; Hvidberg, Christine Schott ; Grinsted, Aslak. / Improved Ice Velocity Measurements with Sentinel-1 TOPS Interferometry. In: Remote Sensing. 2020 ; Vol. 12, No. 12.

Bibtex

@article{592c4e9c659944cba62af831ea2f3c2a,
title = "Improved Ice Velocity Measurements with Sentinel-1 TOPS Interferometry",
abstract = "In recent years, the Sentinel-1 satellites have provided a data archive of unprecedented volume, delivering C-band Synthetic Aperture Radar (SAR) acquisitions over most of the polar ice sheets with a repeat-pass period of 6-12 days using Interferometric Wide swath (IW) imagery acquired in Terrain Observation by Progressive Scans (TOPS) mode. Due to the added complexity of TOPS-mode interferometric processing, however, Sentinel-1 ice velocity measurements currently rely exclusively on amplitude offset tracking, which generates measurements of substantially lower accuracy and spatial resolution than would be possible with Differential SAR Interferometry (DInSAR). The main difficulty associated with TOPS interferometry lies in the spatially variable azimuth phase contribution arising from along-track motion within the scene. We present a Sentinel-1 interferometric processing chain, which reduces the azimuth coupling to the line-of-sight phase signal through a spatially adaptive coregistration refinement incorporating azimuth velocity measurements. The latter are based on available ice velocity mosaics, optionally supplemented by Burst-Overlap Multi-Aperture Interferometry. The DInSAR processing chain is demonstrated for a large drainage basin in Northeast Greenland, encompassing the Northeast Greenland Ice Stream (NEGIS), and integrated with state-of-the-art offset tracking measurements. In the ice sheet interior, the combined DInSAR and offset tracking ice velocity product provides a spatial resolution of50x50mand 1-sigma accuracies of 0.18 and 0.44 m/y in the x and y components respectively, compared to GPS.",
keywords = "ice velocity, Greenland ice sheet, Sentinel-1, TOPS, DInSAR, RADAR INTERFEROMETRY, MASS-BALANCE, SHEET, GREENLAND, MOTION, MISSION, PHASE",
author = "Andersen, {Jonas Kvist} and Anders Kusk and Boncori, {John Peter Merryman} and Hvidberg, {Christine Schott} and Aslak Grinsted",
year = "2020",
month = jun,
day = "23",
doi = "10.3390/rs12122014",
language = "English",
volume = "12",
journal = "Remote Sensing",
issn = "2072-4292",
publisher = "M D P I AG",
number = "12",

}

RIS

TY - JOUR

T1 - Improved Ice Velocity Measurements with Sentinel-1 TOPS Interferometry

AU - Andersen, Jonas Kvist

AU - Kusk, Anders

AU - Boncori, John Peter Merryman

AU - Hvidberg, Christine Schott

AU - Grinsted, Aslak

PY - 2020/6/23

Y1 - 2020/6/23

N2 - In recent years, the Sentinel-1 satellites have provided a data archive of unprecedented volume, delivering C-band Synthetic Aperture Radar (SAR) acquisitions over most of the polar ice sheets with a repeat-pass period of 6-12 days using Interferometric Wide swath (IW) imagery acquired in Terrain Observation by Progressive Scans (TOPS) mode. Due to the added complexity of TOPS-mode interferometric processing, however, Sentinel-1 ice velocity measurements currently rely exclusively on amplitude offset tracking, which generates measurements of substantially lower accuracy and spatial resolution than would be possible with Differential SAR Interferometry (DInSAR). The main difficulty associated with TOPS interferometry lies in the spatially variable azimuth phase contribution arising from along-track motion within the scene. We present a Sentinel-1 interferometric processing chain, which reduces the azimuth coupling to the line-of-sight phase signal through a spatially adaptive coregistration refinement incorporating azimuth velocity measurements. The latter are based on available ice velocity mosaics, optionally supplemented by Burst-Overlap Multi-Aperture Interferometry. The DInSAR processing chain is demonstrated for a large drainage basin in Northeast Greenland, encompassing the Northeast Greenland Ice Stream (NEGIS), and integrated with state-of-the-art offset tracking measurements. In the ice sheet interior, the combined DInSAR and offset tracking ice velocity product provides a spatial resolution of50x50mand 1-sigma accuracies of 0.18 and 0.44 m/y in the x and y components respectively, compared to GPS.

AB - In recent years, the Sentinel-1 satellites have provided a data archive of unprecedented volume, delivering C-band Synthetic Aperture Radar (SAR) acquisitions over most of the polar ice sheets with a repeat-pass period of 6-12 days using Interferometric Wide swath (IW) imagery acquired in Terrain Observation by Progressive Scans (TOPS) mode. Due to the added complexity of TOPS-mode interferometric processing, however, Sentinel-1 ice velocity measurements currently rely exclusively on amplitude offset tracking, which generates measurements of substantially lower accuracy and spatial resolution than would be possible with Differential SAR Interferometry (DInSAR). The main difficulty associated with TOPS interferometry lies in the spatially variable azimuth phase contribution arising from along-track motion within the scene. We present a Sentinel-1 interferometric processing chain, which reduces the azimuth coupling to the line-of-sight phase signal through a spatially adaptive coregistration refinement incorporating azimuth velocity measurements. The latter are based on available ice velocity mosaics, optionally supplemented by Burst-Overlap Multi-Aperture Interferometry. The DInSAR processing chain is demonstrated for a large drainage basin in Northeast Greenland, encompassing the Northeast Greenland Ice Stream (NEGIS), and integrated with state-of-the-art offset tracking measurements. In the ice sheet interior, the combined DInSAR and offset tracking ice velocity product provides a spatial resolution of50x50mand 1-sigma accuracies of 0.18 and 0.44 m/y in the x and y components respectively, compared to GPS.

KW - ice velocity

KW - Greenland ice sheet

KW - Sentinel-1

KW - TOPS

KW - DInSAR

KW - RADAR INTERFEROMETRY

KW - MASS-BALANCE

KW - SHEET

KW - GREENLAND

KW - MOTION

KW - MISSION

KW - PHASE

U2 - 10.3390/rs12122014

DO - 10.3390/rs12122014

M3 - Journal article

VL - 12

JO - Remote Sensing

JF - Remote Sensing

SN - 2072-4292

IS - 12

M1 - 2014

ER -

ID: 246723243