Cassegrain Autoguider

 TAUTORADIAL n 		  n=0-40000 microns

AUTOTHETA  n 		  n=0-180000 millidegrees

		N.B. for values below 35000, the probe may vignette the slit
 [1mm]
AUTOFOCUS  n		  n=0-6000 microns (typically 1500-2500)

AUTOFILT 		 selects EMPTY, CLEAR, OPAQUE, B, V or I
 [3mm]
GSSEARCH 		 to automatically find guide star and move guide probe