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The Antarctic Fibre-Optic Spectrometer (AFOS) is a 30cm Newtonian optical telescope that injects light through … six 30m long optical ¯bres onto a 240¡850nm spectrograph with a 1024 x 256 pixel CCD camera.
To properly characterize the atmospheric properties of a site for a future large telescope or interferometer, it is insufficient to … measure quantities, such as the full-width at half-maximum of a stellar image, that have been integrated over the entire … atmosphere.
The perfect site for astronomical interferometry would be one where the wind speeds throughout the atmosphere were … very low, there was little atmospheric turbulence (especially at high altitudes), the seismic activity was negligible and … the climate very stable. Perhaps surprisingly…
The primary limitation to ground based astronomy is the Earth's atmosphere. The atmosphere above the … Antarctic plateau is fundamentally di erent in many regards compared to the atmosphere at temperate sites. The … extreme altitude…
Abstract. The high plateau that covers half of the continent of Antarctica contains the best astronomical observing sites … on Earth. The infrared sky background is low, the precipitable water vapour is low, the sub-millimetre sky opacity is low, the winds are low…
We evaluate the effect that radome transparency has on atmospheric … opacity measurements performed by the skydip technique. We show that, except at rather high opacities, it is not sufficient to ignore losses in the … radome (or “window”)…
ABSTRACT. The best ground-based astronomical sites in terms of telescope sensitivity at infrared and … submillimeter wavelengths are located on the Antarctic Plateau…
Geophysical inverse methods are used to calculate the basal motion of a glacier. They are applied to a one-dimensional forward model that can be linearized to make the analysis simpler. The inverse method finds a solution that fits the data within a given error.
The diet of grey-headed albatrosses at Diego Ramírez was analysed and compared to that of the … sympatric black-browed albatross. Diet composition was inferred from an analysis of prey hard parts present … in 103 chick regurgitates obtained during breeding seasons 2000, 2001 and 2002.
The firn air "archive" enables reconstruction of atmospheric composition through the past century when many … significant changes occurred in the global atmosphere.
High precision multispecies trace gas measurements of Law Dome ice have been produced for the last 2000 years. The new records of CO2 and CH4 compare very well with the published Law Dome records of the last 1000 years. The new measurements are used to confirm the changes observed in these records…