Technical
 

The Torus Fork Mount
	Weight >400 Kg Pointing error 30 arcsec RMS full sky Tracking error < 0.01 arcsec per second Controls Stepper motors driven by Torus motion control electronics Weather System Full local weather monitoring Time Standard GPS receiver gives better than 1s synchronisation with UTC Control and server computers Linux O/S
The CCD Cameras
	Lens Canon 200mm f/1.8 Aperture 11.1 cm CCD 2048 x 2048 thinned e2v produced by Andor of Belfast Pixel size 13.5 micrometers Readout noise 12-18 e- (in 1MHz pixel readout speed) Gain settings 2, 1.4, 0.7 e-/ADU Maximum pixel count 80,000 e- Field of View 7.8 x 7.8 degrees (61 sq. degrees) Plate Scale 13.7 arcsec/pixel Operating Temperature -50 degree C Cooling Mechanism 3-stage Peltier
The Enclosure
	The enclosure is made from reinforced fibreglass, of dimensions 3.5m x 6.5m, split into two sections. The first section houses the Torus mount and cameras and has a slide-away roof. The second section houses the associated computers. The roof is operated hydraulically with a quick manual release mechanism for emergencies. The building is designed to tolerate < 200 km/hr wind and several metres of snow. The roof has a heating wire to prevent the build-up of ice.