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Underwater vocalizations of Weddell seals (Leptonychotes weddellii) were recorded approximately 1400 km apart at Casey and Davis, Antarctica. Recordings were made during the 1992 and 1997 breeding seasons at Davis and during the 1997 season at Casey.
Measurements of the mid-infrared sky brightness at the South Pole throughout the winter of 1998 show that the sky background is … extremely low and stable. For 50% of the time, the flux in the 8.78 to 9.09 ?m window is below 50 Jy per square arcsecond.
In order to fully characterize the astronomical potential of remote sites on the antarctic plateau, we have developed a suite of instruments covering UV to sub-millimeter … wavelengths. In addition…
Over the past few years, site-testing at the South Pole has revealed conditions that are uniquely favorable for IR astronomy. In particular…
Stereo recordings of harp seal (Pagophilus groenlandicus) and Weddell seal (Leptonychotes weddellii) underwater vocalizations were made near breeding groups using separations between two hydrophones of 159-339 m. Within a large herd, harp seal call numbers varied slightly between channels.