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FrontPage

FAQ / Known issues†

What's this page?

This page lists FAQ and known issues in ASTE operations.

Revision history

• 2016-09-18 - Kamazaki,T. - created

Table of contents

• FAQ / Known issues
  • FAQ
    • COSMOS3
  • Known issues and their workarounds
    • COSMOS3 Manager
    • QLOOK (Line)
    • QLOOK (Cont)
    • Others

FAQ†

COSMOS3†

• How to restart COSMOS3
• How to restart Aspirin
• Enable Aspirin-blue
• Running observation does not start scans
  Here are points to be checked
  • Antenna PROG values are updated every second on the antenna console. If not, make sure that your observation actually starts.
  • Main and sub reflectors are in the PROG mode on the antenna console. If not, let them set PROG.

Known issues and their workarounds†

COSMOS3 Manager†

• Observation suddenly stopped with the message "EMERGENCY STOP (Forced to stop) / Lost control priority." on the Manager GUI
   
  
  • COSMOS3 communication between the ASTE and remote sites was cut due to some (unknown) reasons.
  • Workaround: Just take the priority again by pushing the "THIS NODE" button on the Manager GUI, and you will be able to restart your observations.
  • (Added: 2016-09-28, Resolved: No, JIRA: Not created)

QLOOK (Line)†

• Line Qlook does not show spectra although an observation is running.
  • This looks to be communication failures between the ASTE and remote sites.
  • Workaround: First, restart COSMOS3 at the ASTE site. Second, also restart COSMOS3 at the remote site.
  • (Added: 2016-09-30, Resolved: No, JIRA: Not created)

• Line Qlook shows extremely strong spikes (e.g. >1000 K) at some of X[1-4] in 2GHz mode and X[1-2] in 4GHz mode
   
  
  • Synchronization loss could happen between digital data and reference clocks.
  • Such a pattern could be also seen at X5 and X6 in 2GHz mode and X3 in 4GHz mode. They can be ignored, because they are cross-polarization data.
  • Resolution: Just "START TUNING" on the COSMOS3 manager GUI and then, restart your observation.
  • (Added: 2016-10-05, Resolved: Yes, JIRA: Not created)

QLOOK (Cont)†

Others†

• The Local Controller Activity GUI is frozen and cannot be closed.
   
  
  • The LOC GUI sometimes freezes. Its cause is unknown yet.
  • Workaround: Kill it using xkill (type 'xkill' on a terminal and click the GUI) and then, restart it from the COSMOS3 launcher.
  • (Added: 2016-09-28, Resolved: No, JIRA: Not created)