Use
Case: Stop Pupil Alignment
Description:
After VLTI ISS has finished Pupil Alignment, the ATCS update its "M10 nominal
position" and the AT subsystems are put back to a safe state.
Role(s)/Actor(s):
Primary: User (Operator, Maintenance, VLTI-ISS)
Secondary: Pupil Beacon, M10
Priority:
Major
Performance:
A
few seconds
Frequency:
After
any Pupil Alignment (see Prepare for Pupil Alignment)
Preconditions:
-
Coude Beam switching device is switched On and ONLINE
-
Pupil Beacon is On and ONLINE
-
M10 is ONLINE
Basic
Course:
- Send command STOPPAL to stop Pupil Alignment
-
ATCS updates the value stored in its database for "M10 nominal position"
using the current alpha/beta position of the M10 mirror.
-
ATCS Switches
Off M2 Pupil Beacon
Exception Course: Command failed
- ATCS returns OK reply
Exception
Course: Command failed
Postconditions:
-
Pupil Beacon is switched Off
-
Optical Alignment Parameter file has been updated with "M10 nominal position".
-
Entry in Log File has been created (parameters TBD)
Issues
to be Determined or Resolved:
Last modified: Thu Jun 28 13:40:23 UTC 2001
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