Mr. Jorge R. Ducati Profile

Jorge R. Ducati

at UFRGS

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Proceedings Article | 18 April 2003 Paper

Search for astronomical sites suitable for infrared observations using GOES satellite images

Jorge Ducati, Eleandro Feijo

Proceedings Volume 4882, (2003) https://doi.org/10.1117/12.463011

KEYWORDS: Astronomy, Infrared radiation, Infrared imaging, Infrared astronomy, Satellite imaging, Earth observing sensors, Satellites, Troposphere, Visibility, Clouds

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Images from GOES satellite were used to develop a method to search for sites suitable to astronomical observations in the infrared. An area of study located in the Peruvian Andes was chosen, with altitudes above 2500 m. Forty-three images from the GOES meteorological satellite in channels 3, 4 and 5 were used. The GOES images, spanning an 11-day period, in each channel, were combined to produced images expressing the surface visibility in each channel. Atmospheric turbulence could be estimated from the variation of visibility over six-hour periods, with one image per hour. As criteria to classify sites on the Andes, we combined information on altitude, visibility of the surface in the infrared, the amount of water vapor in the atmosphere, and atmospheric turbulence. Results of this new method showed that the region of Moquegua, in South Peru, is to be preferred in surveys for astronomical sites. Comparisons with results from other investigators, which used other approaches, indicated that this methodology can produce valid results and can be applied to studies covering larger periods. The general results of this study indicate that the method is valid and can effectively be used as an important resource in surveys for infrared astronomical sites.

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