South Polar in situ radio-frequency ice attenuation
Abstract:We have determined the in situ electric field attenuation length Lα (defined as the length over which the signal amplitude diminishes by a factor 1/e) for radio-frequency signals broadcast vertically through South Polar ice and reflected off the underlying bed. Conservatively assuming a bedrock field reflectivity R = 1.0, we estimate Lα = 1450+300−150 m for f = 380 MHz, and T = −50°C; the errors incorporate uncertainties in R. This value is consistent with previous estimates that the radio-frequency attenuation length exceeds the attenuation length at optical frequencies by an order of magnitude.
Document Type: Research Article
Publication date: March 1, 2005
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