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Llano de Chajnantor Observatory is the name for a group of astronomical observatories located at an altitude of over 4,800 m (15,700 ft) in the Atacama Desert of northern Chile. The site is in the Antofagasta Region approximately 50 kilometres (31 mi) east of the town of San Pedro de Atacama .
View looking northeast across the Llano de Chajnantor and the first two ALMA antennas in late 2009, with Cerro Chajnantor rising above at right. The Indian Astronomical Observatory stands at an altitude of 4,500 m (14,800 ft) on Mount Saraswati in Ladakh, India.
The Atacama Pathfinder Experiment (APEX) is a radio telescope 5,064 meters above sea level, at the Llano de Chajnantor Observatory in the Atacama Desert in northern Chile, 50 km east of San Pedro de Atacama built and operated by three European research institutes.
The array has been constructed on the 5,000 m (16,000 ft) elevation Chajnantor plateau – near the Llano de Chajnantor Observatory and the Atacama Pathfinder Experiment. This location was chosen for its high elevation and low humidity, factors which are crucial to reduce noise and decrease signal attenuation due to Earth's atmosphere. [1]
The Cosmic Background Imager (or CBI) was a 13-element interferometer perched at an elevation of 5,080 metres (16,700 feet) at Llano de Chajnantor Observatory in the Chilean Andes. It started operations in 1999 to study the cosmic microwave background radiation and ran until 2008.
The site is located less than 5 km (3.1 mi) north-northeast of the Llano de Chajnantor Observatory, where the Atacama Large Millimeter Array (ALMA) is located, but is over 580 m (1,900 ft) higher in elevation.
LightBuckets (commercial observatory) 2007 Rodeo, New Mexico, US LIGO: 1999: Hanford Site, Washington, US & Livingston, Louisiana, US, US Lindheimer Astrophysical Research Center (defunct) 1966–1995 Evanston, Illinois, US Llano de Chajnantor Observatory: 2005 Atacama Desert, Chile Llano del Hato National Astronomical Observatory: 1975 Mérida ...
Cerro Pachon Observatory: Gemini Observatory, SOAR Telescope. Llano de Chajnantor Observatory: Cosmic Background Imager (CBI), Atacama Pathfinder Experiment (APEX), Q/U Imaging ExperimenT QUIET, Pampa La Bola and Purico Complex: Atacama Submillimeter Telescope Experiment (ASTE), NANTEN2 Observatory