Measurement of the real dielectric permittivity epsilon_r of glacial ice [IMA]

http://arxiv.org/abs/1712.03301


Using data collected by the Askaryan Radio Array (ARA) experiment at the South Pole, we have used long-baseline propagation of radio-frequency signals to extract information on the radio-frequency index-of-refraction in South Polar ice, comparing the arrival times of directly propagating rays with refracted rays. We also observe indications, for the first time, of radio-frequency ice birefringence for signals propagating along predominantly horizontal trajectories, corresponding to an asymmetry of order 0.1% between the ordinary and extra-ordinary birefringent axes, numerically compatible with previous measurements of birefringent asymmetries for vertically-propagating radio-frequency signals at South Pole.

Read this paper on arXiv…

U. Abdul, P. Allison, S. Archambault, et. al.
Tue, 12 Dec 17
63/78

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