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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
  - Observations
- Known issues and their workarounds

FAQ†

COSMOS3†

Observations†

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.
- Both of main and sub reflectors are in the PROG mode on the antenna console. If not, let them set PROG.

No (valid) pointing-result is displayed in QLOOK (Line) while reasonable spectra are plotted on it
Here are points to be checked
- Make sure that signal baseline ranges are reasonably set.
- Make sure that the number of * (on-position) is 6 (normally, 1***1***) in a sequence pattern of a scan file for pointing measurements using the 5-point method.

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)

New observation does not start with the messages "EMERGENCY STOP (Forced to stop) / Cannot connect with COSMOS3 Manager." and also "WARNING Cannot connect with ANTENNA_G infsrv (-1)" on the Manager GUI
- The COSMOS3 manager could not connect with the ANTENNA LOC. Its possible cause is duplicate running of COSMOS3 relevant processes.
- Workaround: Try to stop COSMOS3 TWICE at the ASTE site. If some relevant processes are still listed by the following command on aste-1c even after the stopping,
```
ps -ef | grep -E '(astd|astkyr|astact|astqlcsv|cntsv|hlgsv|pcv|ant|ref|rxt|ffx)' | grep -v antstat
```
  stop all of them using the KILL command or reboot aste-1c. Then, restart COSMOS3 at the ASTE site.
- If ASTE operation supporter is available, ask the supporter to reboot aste-1c.
- If not available, ask Computing people or support scientists.
- (Added: 2016-10-13, Resolved: No, JIRA: ASTE-160)

Observation or tuning fails with the messages "Fatal error INSTRUCTION XXX" and also "ERR local:FFX descriptor=7 cmn_socket_read error = Connection reset by peer / Command SET: local FFX: not connected"
Tuning never finishes, and FFX is in "NO RESPONSE" on the LOC activities GUI"

(Left) Fatal error INSTRUCTION XXX (Right) FFX in "NO RESPONSE"
- The COSMOS3 manager could not connect with the FFX (WHSF) LOC. It would be that old FFX processes remain on aste-1c and still occupy some communication ports of FFX.
- Workaround: Try to stop COSMOS3 (or FFX LOC) at the ASTE site. If some relevant processes are still listed by the following command on aste-1c even after the stopping,
```
ps -ef | grep ffx
```
  stop all of them using the KILL command or reboot aste-1c. Then, restart COSMOS3 (or FFX LOC) at the ASTE site.
- If ASTE operation supporter is available, ask the supporter to reboot aste-1c.
- If not available, ask Computing people or support scientists.
- (Added: 2016-10-14, Resolved: No, JIRA: Not created)

QLOOK (Line)†

Line Qlook does not show any spectra although the telescope is observing a target.
- 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: None)

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)