26 Issue 1.3 LUCIFER User Manual AGw Patrol Field AGw r-theta stage theta limits. The AGw patrol field. N 60” vignetting avoidance At PA=0 E AGw r-theta stage radial limit. The center of rotation is 612.5 mm above the Gregorian rotator center. LUCIFER 4ʼ Field of View Gregorian Focal Plane 11ʼ diameter Figure 10: Plot of the AGw guide probe patrol field (green) is shown, relative to the 4’x4’ LUCIFER field of view (gray square) and the delivered focal plane at the left-front bent Gregorian focal station (outer 11 arcmin diameter circle). The AGw patrol field co-rotates with LUCIFER, so it is always ’above’ in detector space but would, for example, be oriented to the west of the science target at a position angle of 270 degrees.