Again, there would be a database of the subreflector model parameters, containing for each antenna and receiver, the required focus setting, focus vs sin(elevation) coefficient, focus vs temperature coefficient, x,y focus position, x vs cos(elevation) coefficient. Again, quantities in the script are added to those in the database.
focus = <focus offset in mm> xfocus = <x direction translation in mm> yfocus = <y direction translation in mm> temperature = <temperature, C> ! if temperature is 0, use on-line outside thermometer calibration = <ON | OFF | SWITCHING> ! Subreflector center calibration device ! As I understand it, calibration scheme still undecided. ! Might require a few more codes (ie thermal calib might need ONHOT, ONCOOL) ! parameters need to be added for control of nutating subreflector if one ! is eventually decided on; I understand one is not in the baseline plan.