Sphere SSA-850 - Rotation Clearance Requirements; Obstacle Clearance at 450 mm Radius; Obstacle Clearance at 600 mm Radius

3. Recommended minimum rotation clearance (from centre of dish rotation)
 @ 450mm Radius - surrounding items such as hatches etc. must NOT be
taller than 190mm in height.
 @ 600mm Radius - surrounding items such as AC units or Roof Storage Pods
must NOT be taller than 260mm in height