The angle is about 9x10^-5 radians. If you were to take a meter stick (or a yard stick) and stick a piece of paper under one end, that's the precision within w

The angle is about 9x10^-5 radians. If you were to take a meter stick (or a yard stick) and stick a piece of paper under one end, that's the precision within which it can point the dish. (While the earth is spinning, and going around the sun!) The actual width of the beam is about 5 times that angle.