! On the fly mode 
! Resol: big map 10'x 10' for extended sources, at the limit possibilities
! in terms of speed, resolution, inegration time and file size
! attention: time expensive
!
OTFMAP -300 -300 300 -300 - ! offsets at start and end of first otf subscan
  /system truehorizon - ! projection AzEl is used to define the map
  /zigzag - ! go back and forth
  /step 0 15 - ! steps between subscans in arcsecond (= 0.7 samples / HPBW_convol 1mm)
  /notf 41 - ! number of subscans
  /totf 20 - ! time of a subscan (30"/s)
  /reference no ! no off-source reference subscan

SAY "OTFMAP 600''x 600'' (step 15) in 41 subscan x 20 s = 14+5 ~= 19 min."