Collaboration Case: Close APD Loop

Description: Close the APD loop. The APD sensor acquires photons, compute the diagnostics and sends correction to M6.

Performance: some milli-seconds

Frequency: At any time

Package Assignment:  Field Stabilization Subsystem.

Preconditions:

• FSS Strap is ONLINE
• High voltage is ON.
• APD gate is not 0.

Basic Course:

• ATCS sends command to close the APD loop
  Exception Course: command failed

Exception Course:

• ATCS returns ERROR reply

Postconditions:

The APD loop is closed. Corrections are sent to M6.

Issues to be Determined or Resolved:

Notes: Typically 5 to 8 exposures are needed for the loop to converge.

Last modified: Thu Jun 28 13:21:45 UTC 2001