Sloan Digital Sky Survey

Note: Looking at the back of the mirrors, the degrees start from the twelve o'clock position on the mirrors and increase as one moves in a clockwise direction.

*TPM Position*	*Mirror Position*
M1 block 0-0	front plate-0 deg-outer ring
M1 block 0-1	back plate-0 deg-outer ring
M1 block 0-2	front plate-30 deg-outer ring
M1 block 0-3	back plate-30 deg-outer ring
M1 block 0-4	front plate-60 deg-outer ring
M1 block 0-5	back plate-60 deg-outer ring
M1 block 0-6	front plate-45 deg-inner ring
M1 block 0-7	back plate-45 deg-inner ring
M1 block 1-0	front plate-90 deg-outer ring
M1 block 1-1	back plate-90 deg-outer ring
M1 block 1-2	front plate-120 deg-outer ring
M1 block 1-3	back plate-120 deg-outer ring
M1 block 1-4	front plate-150 deg-outer ring
M1 block 1-5	back plate-150 deg-outer ring
M1 block 1-6	front plate-135 deg-inner ring
M1 block 1-7	back plate-135 deg-inner ring
M1 block 2-0	front plate-180 deg-outer ring
M1 block 2-1	back plate-180 deg-outer ring
M1 block 2-2	front plate-210 deg-outer ring
M1 block 2-3	back plate-210 deg-outer ring
M1 block 2-4	front plate-240 deg-outer ring
M1 block 2-5	back plate-240 deg-outer ring
M1 block 2-6	front plate-225 deg-inner ring
M1 block 2-7	back plate-225 deg-inner ring
M1 block 3-0	front plate-270 deg-outer ring
M1 block 3-1	back plate-270 deg-outer ring
M1 block 3-2	front plate-300 deg-outer ring
M1 block 3-3	back plate-300 deg-outer ring
M1 block 3-4	front plate-330 deg-outer ring
M1 block 3-5	back plate-330 deg-outer ring
M1 block 3-6	front plate-315 deg-inner ring
M1 block 3-7	back plate-315 deg-inner ring

*TPM Position*	*Mirror Position*
M2-block 0-0	front plate-0 deg-outer ring
M2-block 0-1	back plate-0 deg-outer ring
M2-block 0-2	front plate-0 deg-inner ring
M2-block 0-3	back plate-0 deg-inner ring
M2-block 1-0	front plate-180 deg-inner ring
M2-block 1-1	back plate-180 deg-inner ring
M2 block 1-2	front plate-240 deg-outer ring
M2 block 1-3	back plate-240 deg-outer ring
M2 block 1-4	front plate-270 deg-inner ring
M2 block 1-5	back plate-270 deg-inner ring
M2 block 1-6	front plate-300 deg-outer ring
M2 block 1-7	back plate-300 deg-outer ring
M2 block 2-0	back plate-180 deg-outer ring
M2 block 2-1	front plate-180 deg-outer ring
M2 block 2-2	back plate-120 deg-outer ring
M2 block 2-3	front plate-120 deg-outer ring
M2 block 2-4	back plate-90 deg-inner ring
M2 block 2-5	front plate-90 deg-inner ring
M2 block 2-6	back plate-60 deg-outer ring
M2 block 2-7	front plate-60 deg-outer ring