! On the fly mode 
! Resol: big map covering all array pixels even if not very well centered
! for all pixels map => geometry of the arrays. attention! : time expensive
!
! rq: The arrays are a discs of 140" in diameter (200" diagonal)
! Robert Zylka asked for a more Az extended map
!
! very fast OTF geometry oversampling 1mm diffr pattern, 
! should work without tracking error below 70 deg

OTFMAP -210 -110 210 -110 - ! 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 4 - ! steps between subscans in arcsecond (= 2.6 samples / HPBW_convol 1mm)
  /notf 56 - ! number of subscans
  /totf 12 - ! time of a subscan 35"/s
  /reference no ! no off-source reference subscan

SAY "OTFMAP 420''x 220'' (step 4) in 56 subscans x 12 s = 11+3 ~= 14 min."