sky_offset/add [x=?, y=?]
Replace or add to the sky-based tracking offsets.
/add
PointingOffset y
PointingOffset x
sky_offset/add x=0:0:10, y=0.02The second example shows how to replace any existing sky offsets with new sky offsets. In this case both are being set to zero, to remove all sky offsets.
sky_offset x=0, y=0
A simple way to think of these offsets, is to imagine lying on one's back, flat on the deck of the telescope, with one's feet pointed towards the lowest part of the deck, the top of one's head pointed towards the highest part of the deck, and one's arms stretched out perpendicularly from one's sides, flat against the deck. One's feet would then point at a sky offset of x=0,y=-90 degrees, one's head would be pointed at a sky offset of x=0,y=90, one's right hand would point at a sky offset of x=90,y=0 degrees, one's left hand would be pointed at a sky offset of x=-90,y=0, and one's face would be looking along the bore-site at x=0,y=0.