.nf
/SKY xOffsetC yOffsetC
or
/SKY NO                        ! do not do sky calibration

Do a calibration subscan on sky.

Real      :: xOffsetC          ! x-offset
Real      :: yOffsetC          ! y-offset 

NOTES: with the usage /SKY xOffsetC yOffsetC, both parameters are required,
but you can replace either parameter with * to leave it unchanged.
The system for the offsets is selected through the option /SYSTEM.
.fi

