Recording to ATNF V014B.
Each experiment segment starts one minute after the segment start time specified by the experiment, and continues until the specified start time of the next segment. This one minute change gap is there to prevent the recorder getting confused at changeover.
That is:
323 11:00:00 - 323 12:50:00 v255u.5cm-icrf
323 12:51:00 - 323 16:00:00 v255u.5cm
323 16:01:00 - 323 16:54:00 v255u.5cm-icrf
323 16:55:00 - 323 20:00:00 v255u.5cm
323 20:01:00 - 323 20:54:00 v255u.5cm-icrf
323 20:55:00 - 324 00:00:00 v255u.5cm
324 00:01:00 - 324 00:45:00 v255u.5cm-icrf
324 00:46:00 - 324 04:00:00 v255u.5cm
324 04:01:00 - 324 04:45:00 v255u.5cm-icrf
324 04:46:00 - 324 10:10:00 v255u.5cm
324 10:11:00 - 324 11:00:00 v255u.5cm-icrf