Things that cannot be fixed

• cases where the logic flow of your script depends on the contents of the output of observing programs, cannot be handled properly. Although they are not illegal scripts, it is not good practice to do this. For example, if observing scripts manipulate the common block (e.g. using alter   or loadcom), subsequent programs should not assume this information is present in the emulated common block. Also note that not all checker programs write in the COMMON (yet), so beware if your scripts depend on that.
• accurate slewing time estimates. Specs tell us that the new telescopes slew at 80 deg/min in  both AZ and EL; the old ones (ants 1 & 3) do it at 40 deg/min in AZ, and 80 deg/min in EL. Most importantly, after slewing, the telescopes must settle to an equilibrium and track. This may take as much as 1 or 2 minutes, depending on wind etc. Other hardware, such as the correlator, needs some time to settle. Tests have shown that slewing time estimates can be off by as much of a factor of 2.

  Next, there are three az/el modes:

         regular    -180<az<180    0<el<150
         south      -270<az<270    0<el<90
         north                     90<el<150
  

  south is the mode of the future; the new antennas are built for it but not the old. regular is what is normally done, except when doing certain calibration runs (see the SLEWFLAG   in COMMON). We only compute slewing estimates for regular mode.