Purpose: record observations on D and C tapes.
Actors: observer, tape copier.
Outline:
The observer writes observations to the D-tape(s) during the observing night
or at the end, before leaving the telescope to sleep.
During the following
day, the tape copier verifies the D-tape and copies the observations to the
C-tape. When the C-tape has been made, the observation files are purged from
disk leaving only the tapes and a copy in the INT data manager.