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Daytime use of astronomical telescopes for deep-space optical links

Show simple item record Roberts, W. Thomas Ortiz, Gerard G. Boyd, Tim A. 2007-04-03T21:41:13Z 2007-04-03T21:41:13Z 2006-01-22
dc.identifier.citation Free-Space Optical Communications, San Jose, California, January 22-25, 2006. en
dc.identifier.clearanceno 06-0218
dc.description.abstract Tests at the 200-inch Hale Telescope on Palomar Mountain have demonstrated this telescope's ability to withstand considerable thermal stress, and subsequently produce remarkably unaffected results. During the day of June 29,2005, the Hale telescope dome was left open, and the telescope was exposed to outside air and direct sunlight for 8 hours. During this time, portions of the telescope structure in the telescope's optical path experienced temperature elevations of 30 C, while the primary mirror experienced unprecedented heating of over 3 C. The telescope's measured blind pointing accuracy after this exposure was not noticeably degraded from the measurements taken before exposure. More remarkably, the telescope consistently produced stellar images which were significantly better after exposure of the telescope (1.2 arcsec) than before (1.6 arcsec), even though the conditions of observation were similar. This data is the first step in co-opting astronomical telescopes for daytime use as astronomical receivers, and supports the contention that deleterious effects from daytime exposure of the telescope can be held to an acceptable level for interleaved communications and astronomy en
dc.description.sponsorship NASA/JPl en
dc.format.extent 2334491 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2006. en
dc.subject optical communications en
dc.subject deep space communications en
dc.subject telescope heat en
dc.title Daytime use of astronomical telescopes for deep-space optical links en
dc.type Preprint en

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