Infrasound Group
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IS55: Windless Bight, Antarctica
During the austral summer of 1999/2000 we installed an eight microphone array at a site on Windless Bight near the US McMurdo station in Antarctica. The array is located on the ice shelf some xxx kilometers from McMurdo as shown in the figure to the left. The site is comprised of eight microphones arranged in two concentric arrays. The outer microphones lie at the apexes of a pentagon and the inner microphones lie on the corners of an equilateral triangle. A schematic of the array is shown in Figure 2. This configuration provides a broad sequence of inter-microphone distances and as a result shows a very clean impulse response. At each microphone site there is a digitizer that creates 24bit samples of the microphone output and a transmitter that sends the digitized signal to a central hub computer. A power supply (affectionately named "BOB" or Big Orange Box) is located near the center of the array and provides power using diesel generators, batteries and solar panels.
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