STATION gives the names of the stations for which this group of setup parameters applies. SCHED deals with multiple stations by expanding the input group out into a separate group for each station specified. This allows the defaults picked up later, for example from the frequency catalog, to be station dependent. Therefore, if only using very generic inputs, one can lump the stations together even if their final parameters are different.
There are two defaults allowed, VLBA and ' ' (or none specified). If no stations are specified, the program goes through the schedule and finds all stations that are in scans that request that setup file and that have not been specified in other groups within the setup file. Those stations (just VLBA) for any VLBA stations) are added to the setup station list.
Later, the program looks for a perfect match to the station. If it finds one, it uses that setup group. If not, it checks whether the station is a VLBA station (first 4 characters in the station name are VLBA) and whether there was a station=vlba specified. If so, SCHED uses the parameters from the vlba group.
The old station=default option has been removed.
Note that you cannot specify no stations for one setup group and some specific ones for another within the same file and expect anything reasonable to happen.