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Problem: No Tip-Tilt Correction

Manifestation:

  • Difficulty with loop stability in both NGS and LGS modes.
  • Unreasonable tx or ty values in peeko display.

Solution:

Stop the following services (in sequence):
  1. In ShaneAO loop control (saocon_gui) (main SAO GUI): Select File.., Exit...
  2. Locate the terminal labelled shaneao; Place cursor in this window to make it the active window; Hit return/enter key to acquire a python ( >>> ) prompt; At the python prompt, type exit(). This stops the underlying shaneao software process(es).
  3. As user on musher, stop woofer services:

    /usr/local/lick/etc/init.d/woofer stop

  4. On user on shred:

    /usr/local/lick/etc/init.d/offload120.sh stop

Re-start the following services (in sequence):
  1. On shred:

    /usr/local/lick/etc/init.d/offload120.sh start

  2. On musher:

    /usr/local/lick/etc/init.d/woofer start

  3. Start shaneao software (from pull-down menu).
  4. Start: saocon_gui (from pull-down menu).

Cause:

  • Unknown.

Associated Issues:

Change Log:

2019-01-24: First version.

This document last updated (UTC): Tuesday 04 March 2025