Use Case:  Save Guide Detector Image

Description:  The requested image from the FAS is saved as a standard image file.

Role(s)/Actor(s): 
Primary: Operator,Maintenance
Secondary: FAS sub-system

Priority: Desirable

Performance: a few seconds

Frequency: Whenever requested

Package Assignment:  Auto Guiding.

Preconditions: 

• FAS sub-system is active
• FAS images are displayed

Basic Course: 

• Send command to save an image from the FAS with a given name
  Exception Course: Command failed
• ATCS saves on file the next image produced by the FAS
  Exception course: Command failed
• ATCS returns OK reply

Exception Course:  Command failed

• ATCS returns ERROR reply

Postconditions: 

• The image is stored on file

Issues to be Determined or Resolved: 

Notes:The current implementation of the TCCD SW does not allow to switch ON/OFF on the fly, during an infinite loop of exposures, the saving of complete images (i.e. images including a complete FITS header). The switching of saving on disk is linked to the Start/Stop commands. The GRAB command allow anyway to save an image at any time with just a partial FITS header (see SPR990076).

Last modified: Thu Jun 28 13:04:07 UTC 2001