Next: Mark III Observations Up: Tape Management Previous: POSTPASSES Contents . Automatic tape allocation is provided on the VLBA. In fact, its use is required for most observations. ... Automatic tape allocation is not available for all stations, including all that use VEX files. ... If a station that is using automatic tape allocation is scheduled in a scan on a source that is below the antenna hardware limits (not just the horizon), that antenna will be removed from the scan by SCHED. ...