ESA'S POLarimetric Airborne Radar Ice Sounder (POLARIS): design and first results

Dall, Jørgen; Kristensen, Steen Savstrup; Krozer, Viktor; Hernandez, C.C.; Vidkjaer, J.; Kusk, Anders; Balling, Jan E.; Skou, N.; Søbjærg, Sten Schmidl; Christensen, E.L.

doi:10.1049/iet-rsn.2009.0035

Cited by 56 publications

(24 citation statements)

References 15 publications

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“…The DBP algorithm was applied to data acquired with the POLARIS ice sounder [5]. POLARIS is a fully polarimetric, airborne P-band ice sounder developed for ESA by DTU Space, and operates at 435 MHz, with a bandwidth up to 85 MHz.…”

Section: Focusingmentioning

confidence: 99%

SAR focusing of P-band ice sounding data using back-projection

Kusk

Dall

2010

2010 IEEE International Geoscience and Remote Sensing Symposium

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SAR processing can be applied to ice sounder data to improve along-track resolution and clutter suppression. This paper presents a time-domain back-projection technique for SAR focusing of ice sounder data. With this technique, variations in flight track and ice surface slope can be accurately accommodated at the expense of computation time. The back-projection algorithm can be easily parallelized however, and can advantageously be implemented on a graphics processing unit (GPU). Results from using the back-projection algorithm on POLARIS ice sounder data from North Greenland shows that the quality of data is improved by the processing, and the performance of the GPU implementation allows for very fast focusing.

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Section: Focusingmentioning

confidence: 99%

SAR focusing of P-band ice sounding data using back-projection

Kusk

Dall

2010

2010 IEEE International Geoscience and Remote Sensing Symposium

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“…POLARIS is a fully polarimetric system [7], [8], characterized by a maximum bandwidth of 85 MHz, corresponding to a vertical resolution (in ice) of about 1 m. In order to increase the dynamic range, a shallow/deep sounding approach is adopted, i.e. when necessary, overlapped near-surface and near-bottom windows are covered separately.…”

Section: Polaris Radarmentioning

confidence: 99%

Polarimetric ice sounding at P-band: First results

Dali

2009

2009 IEEE International Geoscience and Remote Sensing Symposium

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For polar ice sheets valuable stress and strain information can be deduced from the crystal orientation fabric (COF) and its prevailing c-axis alignment. Polarimetric radio echo sounding is a promising technique to measure the anisotropic electromagnetic propagation and reflection properties associated with the COF. In this paper, dualpolarized P-band data acquired with the airborne POLARIS system near the ice divide of the Greenland ice sheet are analyzed. The internal layers in the uppermost few hundred meters of the ice sheet look the same at HH and VV polarizations, whereas the layering differs further down. Accordingly, the magnitude of the complex HH-VV correlation coefficient decreases with depth and, interestingly, the phase gives evidence of polarization dependent reflection and birefringence effects.

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“…The model was originally developed in parallel with the design of the Polarimetric Airborne Radar Ice Sounder (POLARIS) [1], but subsequently the model has been upgraded in order to assess the feasibility of space-based radar ice sounding. For that a two-step approach is applied:…”

Section: Introductionmentioning

confidence: 99%

“…At P-band the attenuation and scattering properties of the ice sheets are not as well known as they are at the lower frequencies commonly used from aircraft, but in 2005 the Technical University of Denmark was commissioned by ESA to development the POLARIS system [1], and encouraging results were obtained with data acquired in Greenland. In February 2011 POLARIS data were acquired in Antarctica as part of the IceGrav campaign [3], the primary objective of which was to measure gravity in Queen Maud Land, but a secondary objective was to acquire Pband sounder data, benefitting from the large coverage offered by the Basler DC3 aircraft used.…”

Section: Introductionmentioning

confidence: 99%

A backscattering and propagation model for radar sounding of ice sheets

Dall

2016

2016 IEEE International Geoscience and Remote Sensing Symposium (IGARSS)

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In this paper the electromagnetic properties of the continental ice sheets are modeled with the aim of assessing the feasibility of space-based radar ice sounding at P-band. The paper focuses on the model itself, as distinct from the estimation of model parameters and the exploitation of the model. The scattering and propagation properties of the ice sheets are characterized using an empirical approach. The model comprises surface scattering from the air/ice interface and the ice/bed interface as well as volume scattering from the firn and the ice. Also specular reflection from the internal layers is modeled. In combination with simple models of the ice sounding radar and the geometry, the electromagnetic model estimates the return waveform and its constituents, such that sensitivity and clutter masking issues can be assessed.

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ESA'S POLarimetric Airborne Radar Ice Sounder (POLARIS): design and first results

Cited by 56 publications

References 15 publications

SAR focusing of P-band ice sounding data using back-projection

SAR focusing of P-band ice sounding data using back-projection

Polarimetric ice sounding at P-band: First results

A backscattering and propagation model for radar sounding of ice sheets

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