Clouds at CTIO and the Dark Energy Survey
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
An understanding of the weather patters at Cerro-Tololo Inter-American (CTIO) Observatory, the observing site for the Dark Energy Survey (DES), is important for assessing the efciency of DES operations in using observing time and for planning future operations. CTIO has maintained records of cloud-cover by quarters of nights since 1975. A comparison between these cloud records in the 2013-2014 DES observing season (DES year 1) and achieved observing efciency and exposure quality allows the DES collaboration to make better use of the historical records in survey planning. Plots and tables here relate human recorded cloud-cover to collection of good DES data, show the variation of typical cloud-cover by month, and evaluate the relationship between the El Niño weather pattern and cloud-cover at CTIO.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- Dark Energy Survey (DES)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1250881
- Report Number(s):
- FERMILAB-FN-1002-AE-CD; 1424764
- Country of Publication:
- United States
- Language:
- English
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