DOSTA tells SCHED to process only those stations whose names match the value given for DOSTA to as many characters as given for DOSTA. This is intended primarily for telescope friends who wish to rerun SCHED using the keyin file provided by the observer and who do not want output for all stations. Requireing a match only on the specified characters allows DOSTA='VL' to be specified to obtain all VLBA and VLA files. DOSTA affects the stations read for the current scan. Normally it would be specified among the first set of inputs and not changed. In this case, it will affect the whole schedule.