Accuracy and Performance of CryoSat-2 SARIn Mode Data Over Antarctica

Fang Wang; Jonathan L. Bamber; Xiao Cheng

doi:10.1109/LGRS.2015.2411434

Accuracy and Performance of CryoSat-2 SARIn Mode Data Over Antarctica

Fang Wang, Jonathan L. Bamber, Xiao Cheng

Research output: Contribution to journal › Article (Academic Journal) › peer-review

33 Citations (Scopus)

Abstract

The instrument onboard CryoSat-2 has a new measurement mode to improve performance on the steeper margins of the ice sheets where conventional radar altimetry has been limited in accuracy and coverage. We assess the accuracy of CryoSat-2 synthetic aperture radar interferometric (SARIn) mode data using data from Geoscience Laser Altimeter System onboard ICESat and also compare coverage with conventional altimetry. Biases, exceeding 4 m, were ubiquitous in areas with surface slopes above about 0.9°. Over the ice shelves and the interior of the ice sheet, the bias was less than 50 cm but appeared to be sensitive to snowpack density. We find that the accuracy and coverage of CryoSat-2 SARIn mode data is significantly better than for previous satellite radar altimeter missions for slopes up to 1°.

Original language	English
Article number	7083707
Pages (from-to)	1516-1520
Number of pages	5
Journal	IEEE Geoscience and Remote Sensing Letters
Volume	12
Issue number	7
Early online date	9 Apr 2015
DOIs	https://doi.org/10.1109/LGRS.2015.2411434
Publication status	Published - 1 Jul 2015

Keywords

CryoSat-2
ice shelves
radar altimetry

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Cite this

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title = "Accuracy and Performance of CryoSat-2 SARIn Mode Data Over Antarctica",

abstract = "The instrument onboard CryoSat-2 has a new measurement mode to improve performance on the steeper margins of the ice sheets where conventional radar altimetry has been limited in accuracy and coverage. We assess the accuracy of CryoSat-2 synthetic aperture radar interferometric (SARIn) mode data using data from Geoscience Laser Altimeter System onboard ICESat and also compare coverage with conventional altimetry. Biases, exceeding 4 m, were ubiquitous in areas with surface slopes above about 0.9°. Over the ice shelves and the interior of the ice sheet, the bias was less than 50 cm but appeared to be sensitive to snowpack density. We find that the accuracy and coverage of CryoSat-2 SARIn mode data is significantly better than for previous satellite radar altimeter missions for slopes up to 1°.",

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AU - Wang, Fang

AU - Bamber, Jonathan L.

AU - Cheng, Xiao

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AB - The instrument onboard CryoSat-2 has a new measurement mode to improve performance on the steeper margins of the ice sheets where conventional radar altimetry has been limited in accuracy and coverage. We assess the accuracy of CryoSat-2 synthetic aperture radar interferometric (SARIn) mode data using data from Geoscience Laser Altimeter System onboard ICESat and also compare coverage with conventional altimetry. Biases, exceeding 4 m, were ubiquitous in areas with surface slopes above about 0.9°. Over the ice shelves and the interior of the ice sheet, the bias was less than 50 cm but appeared to be sensitive to snowpack density. We find that the accuracy and coverage of CryoSat-2 SARIn mode data is significantly better than for previous satellite radar altimeter missions for slopes up to 1°.

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KW - ice shelves

KW - radar altimetry

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JO - IEEE Geoscience and Remote Sensing Letters

JF - IEEE Geoscience and Remote Sensing Letters

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Accuracy and Performance of CryoSat-2 SARIn Mode Data Over Antarctica

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Resolving Antarctic ice mass trends

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Accuracy and Performance of CryoSat-2 SARIn Mode Data Over Antarctica

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Resolving Antarctic ice mass trends

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