altazimuth - significado y definición. Qué es altazimuth
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Qué (quién) es altazimuth - definición

LARGE TELESCOPE IN RUSSIA
Bolshoi Teleskop Azimutalnyi; Bolshoi Altazimuth Telescope; Большой Телескоп Альт-азимутальный; Bolshoi Teleskop Alt-azimutalnyi; Bolshoi Telescope; Large Altazimuth Telescope; Bolshoi Izamutal'ny Teleskop
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  • Inside the main observatory

altazimuth      
[al'taz?m??]
¦ noun
1. Astronomy a telescope mounting that moves in azimuth (about a vertical axis) and in altitude (about a horizontal axis). Compare with equatorial mount.
2. a surveying instrument for measuring vertical and horizontal angles.
Origin
C19: blend of altitude and azimuth.
Altazimuth      
·noun An instrument for taking azimuths and altitudes simultaneously.
Altazimuth mount         
TWO-AXIS MOUNT FOR SUPPORTING AND ROTATING AN INSTRUMENT SUCH AS A TELESCOPE ABOUT TWO PERPENDICULAR AXES – ONE VERTICAL AND THE OTHER HORIZONTAL
Altaz mount; Altazimuth mounting; Altitude/azimuth; Azimuth mounting; Azimuth-elevation mounting; Az-el mounting; Alt-azimuth mount; Alt-Az
An altazimuth mount or alt-azimuth mount is a simple two-axis mount for supporting and rotating an instrument about two perpendicular axes – one vertical and the other horizontal. Rotation about the vertical axis varies the azimuth (compass bearing) of the pointing direction of the instrument.

Wikipedia

BTA-6

The BTA-6 (Russian: Большой Телескоп Альт-азимутальный, romanized: Bolshoi Teleskop Alt-azimutalnyi, lit. 'Large Altazimuth Telescope') is a 6-metre (20 ft) aperture optical telescope at the Special Astrophysical Observatory located in the Zelenchuksky District of Karachay-Cherkessia on the north side of the Caucasus Mountains in southern Russia.

The BTA-6 achieved first light in late 1975, making it the largest telescope in the world until 1990, when it was surpassed by the partially constructed Keck 1. It pioneered the technique, now standard in large astronomical telescopes, of using an altazimuth mount with a computer-controlled derotator.

For a variety of reasons, BTA-6 has never been able to operate near its theoretical limits. Early problems with poorly fabricated mirror glass were addressed in 1978, improving but not eliminating the most serious issue. But due to its location downwind of numerous large mountain peaks, astronomical seeing is rarely good. The telescope also suffers from serious thermal expansion problems due to the large thermal mass of the mirror, and the dome as a whole, which is much larger than necessary. Upgrades have taken place throughout the system's history and are ongoing to this day.