Tomographic SAR analysis of subsurface ice structure in Greenland: First results

Banda, Francesco; Dall, Jørgen; Tebaldini, Stefano; Rocca, F.

doi:10.1109/igarss.2013.6721135

Cited by 6 publications

(7 citation statements)

References 11 publications

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“…In both situations the vertical backscattered power profile is not sparse in the spatial domain. Nonetheless, it follows a very simple two-component structure and appears to be quite regular (in the case of ice the two components are represented by surface and subsurface ice volume, as already verified experimentally in [6]). Thus, a suitable sparse representation can be found choosing an appropriate basis in the wavelet domain.…”

Section: Evaluation Of Other Estimation Techniquesmentioning

confidence: 76%

“…The test site is a glaciological measurement site in the K-transect conventionally named SHR, located in the southwest of Greenland (67 • N 50 • W, average altitude approximately 700 m) [5], [6]. The area is located in the ablation zone of the glacier, it is characterized by relatively high ablation and low accumulation and it has a gentle topography.…”

Section: Tomographic Datamentioning

confidence: 99%

“…Consequently, the employment of superresolution techniques like Capon filter has the advantage over traditional beamforming that sidelobes are sensibly reduced and resolution is greatly enhanced. For more details about the tomographic processing carried out on the dataset see [6].…”

Section: Tomographic Datamentioning

confidence: 99%

“…In particular, among the objectives of the campaign there was the assessment of the capability of P-band SAR tomography of providing information about ice subsurface vertical structure. As reported in [6], the effectiveness of tomography in providing a direct access into the vertical structure of the medium was successfully assessed, obtaining both evidence of morphological structures at subsurface and separation of the scattering mechanisms.…”

Section: Introductionmentioning

confidence: 99%

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Ice penetration depth estimation from super-resolution SAR tomography

Banda

Tebaldini

Rocca

2014

2014 11th European Radar Conference

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In this paper a quantitative analysis of the penetration depth of P-band SAR signal into ice subsurface is addressed. Penetration depth is estimated from tomographic SAR acquisitions relative to ESA IceSAR 2012 campaign. In particular, an area in the ablation zone of South-West Greenland is investigated, retrieving the penetration depth with superresolution spectral techniques. Biasing due to the space-varying vertical resolution over the scene is accounted for. Data from opposite-side views are processed in order to obtain penetration maps of the area to be compared. Consistent penetration depth maps of about 20-30 m are obtained from both views, proving the validity of SAR tomography as an effective tool for mapping information about subsurface ice structure.

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Section: Evaluation Of Other Estimation Techniquesmentioning

confidence: 76%

Section: Tomographic Datamentioning

confidence: 99%

Section: Tomographic Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Ice penetration depth estimation from super-resolution SAR tomography

Banda

Tebaldini

Rocca

2014

2014 11th European Radar Conference

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“…The advantage of SAR tomographic experiments stays in the horizontal resolution that is much higher than that reachable with sounders. In order to measure the possible results, after preliminary tests in Greenland (Banda et al 2013), a survey was carried out over the Mittelbergferner glacier in Austria (Figure 11), Figure 11. Simulation of the SAOCOM CS results: a transect in the three polarimetric channels.…”

Section: Glaciersmentioning

confidence: 99%

Airborne and satellite SAR tomography: a tool to investigate forests and glaciers structures

2016

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Microwave radiations below say 1250 MHz penetrate forests, dry ice and rocks. The use of airborne or satellite borne microwave sensors to image the subsurface with significant penetration is thus of high interest to analyse wide areas or even to make global surveys. Due to the large distance from the targets, the antenna has to be synthesized using a progressive scan and illuminating the targets from different positions. The radar returns are then properly combined using a computer. The position of the sensor has to be known to a fraction of a wavelength. This is rather easy to obtain if the sensor flies along a well-characterized track (synthetic aperture radar (Bamler and Hartl, 1998)). The creation of the across track aperture is much more difficult. It can be done by using many flights or orbits, which positions, however, need to be extremely well known. We show that this can be obtained by exploiting the characteristics of the targets. We will present the results obtained with airborne campaigns using polarimetric radars on boreal and tropical forests, which were carried out in order to estimate the above ground biomass. Campaigns have also been carried out over glaciers, to estimate the structure of the subsurface. We will then introduce two new satellites, Biomass and SAOCOM companion, planned to be deployed by the European Space Agency in the forthcoming years. Exploiting the results of the ad hoc airborne campaigns, the results to be obtained with these systems are simulated and presented. ARTICLE HISTORY

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Ice flow mapping with P-band SAR

Dall

Nielsen

Kusk

et al. 2013

2013 IEEE International Geoscience and Remote Sensing Symposium - IGARSS

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Glacier and ice sheet dynamics are currently mapped with X-, C-, and L-band SAR. With the prospect of a P-band SAR, Biomass, to be launched within the next decade it is interesting to look into the potential of P-band for ice velocity mapping. In this paper first results are presented. Airborne P-band SAR data have been acquired in Greenland, and both offset tracking and DInSAR have been applied to the full resolution data as well as to data degraded to the resolution of Biomass. Generally, ice velocity maps are successfully generated, but in the ablation zone, DInSAR fails in the melt season at both resolutions, while feature tracking fails at the coarser resolution.

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Tomographic SAR analysis of subsurface ice structure in Greenland: First results

Cited by 6 publications

References 11 publications

Ice penetration depth estimation from super-resolution SAR tomography

Ice penetration depth estimation from super-resolution SAR tomography

Airborne and satellite SAR tomography: a tool to investigate forests and glaciers structures

Ice flow mapping with P-band SAR

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