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Remote Sens. 2012, 4(9), 2753-2767; doi:10.3390/rs4092753
Article

Mapping of Ice Motion in Antarctica Using Synthetic-Aperture Radar Data

1,* , 1
 and 1,2
Received: 19 July 2012; in revised form: 30 August 2012 / Accepted: 4 September 2012 / Published: 18 September 2012
(This article belongs to the Special Issue Remote Sensing by Synthetic Aperture Radar Technology)
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Abstract: Ice velocity is a fundamental parameter in studying the dynamics of ice sheets. Until recently, no complete mapping of Antarctic ice motion had been available due to calibration uncertainties and lack of basic data. Here, we present a method for calibrating and mosaicking an ensemble of InSAR satellite measurements of ice motion from six sensors: the Japanese ALOS PALSAR, the European Envisat ASAR, ERS-1 and ERS-2, and the Canadian RADARSAT-1 and RADARSAT-2. Ice motion calibration is made difficult by the sparsity of in-situ reference points and the shear size of the study area. A sensor-dependent data stacking scheme is applied to reduce measurement uncertainties. The resulting ice velocity mosaic has errors in magnitude ranging from 1 m/yr in the interior regions to 17 m/yr in coastal sectors and errors in flow direction ranging from less than 0.5 in areas of fast flow to unconstrained direction in sectors of slow motion. It is important to understand how these mosaics are calibrated to understand the inner characteristics of the velocity products as well as to plan future InSAR acquisitions in the Antarctic. As an example, we show that in broad sectors devoid of ice-motion control, it is critical to operate ice motion mapping on a large scale to avoid pitfalls of calibration uncertainties that would make it difficult to obtain quality products and especially construct reliable time series of ice motion needed to detect temporal changes.
Keywords: Antarctica; InSAR; ice motion Antarctica; InSAR; ice motion
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Mouginot, J.; Scheuchl, B.; Rignot, E. Mapping of Ice Motion in Antarctica Using Synthetic-Aperture Radar Data. Remote Sens. 2012, 4, 2753-2767.

AMA Style

Mouginot J, Scheuchl B, Rignot E. Mapping of Ice Motion in Antarctica Using Synthetic-Aperture Radar Data. Remote Sensing. 2012; 4(9):2753-2767.

Chicago/Turabian Style

Mouginot, Jeremie; Scheuchl, Bernd; Rignot, Eric. 2012. "Mapping of Ice Motion in Antarctica Using Synthetic-Aperture Radar Data." Remote Sens. 4, no. 9: 2753-2767.


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