Telescope

The basic specifications of the 12 Meter Telescope are listed in Table 1.

  

Table 1: Telescope and Site Characteristics

Site
	East Longitude:	-111 36 53.475
	North Latitude:	+31 57 12.0
	Elevation:	1914 meters (6280 feet)
Telescope
	Primary Reflector Diameter:	12.0 meters
	Focal Ratio  (f/D)
	Prime Focus:	0.42
	Cassegrain Focus:	13.8
	Surface Accuracy :	75 $\mu$m rms
	Mount:	Elevation over Azimuth
	Slew Rate :	68/minute
	Pointing Accuracy :	5 rms
	Elevation Limit :	15
	Enclosure:	Tracking astrodome with movable door
	Aperture Efficiencies:	52% at 70 GHz
		49% at 115 GHz
		32% at 230 GHz
		22% at 300 GHz