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Weather at Sierra Negra: 7.3-year statistics and a new method to estimate the temporal fraction of cloud cover

Carrasco, E ; Carramiñana, A ; Avila, R ; Gutiérrez, C ; Avilés, J L ; Reyes, J ; Meza, J ; Yam, O

arXiv.org, 2009-06

Ithaca: Cornell University Library, arXiv.org

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  • Título:
    Weather at Sierra Negra: 7.3-year statistics and a new method to estimate the temporal fraction of cloud cover
  • Autor: Carrasco, E ; Carramiñana, A ; Avila, R ; Gutiérrez, C ; Avilés, J L ; Reyes, J ; Meza, J ; Yam, O
  • Assuntos: Cloud cover ; Meteorological data ; Physics - Atmospheric and Oceanic Physics ; Physics - Instrumentation and Methods for Astrophysics ; Sky ; Solar radiation ; Space telescopes ; Thermal stability
  • É parte de: arXiv.org, 2009-06
  • Descrição: Sierra Negra, one of the highest peaks in central Mexico, is the site of the Large Millimeter Telescope. We describe the first results of a comprehensive analysis of the weather data measured in situ from October 2000 to February 2008 to be used as a reference for future activity in the site. We compare the data from two different stations at the summit considering the accuracy of both instruments. We analysed the diurnal, seasonal and annual cycles for all the parameters. The thermal stability is remarkably good, crucial for a good performance of the telescopes. From the solar radiation data we developed a new method to estimate the fraction of time when the sky is clear of clouds. We show that our measurements are consistent with a warm standard atmosphere model. The conditions at the site are benign and stable given its altitude, showing that Sierra Negra is a extremely good site for millimeter and high energy observations.
  • Editor: Ithaca: Cornell University Library, arXiv.org
  • Idioma: Inglês
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