Last Update: 12th February 2021
This page illustrates how to solve the troubles that frequently occur while the operation of the Nobeyama 45-m telescope.
One of the most frequent errors on the Nobeyama 45-m telescope is "SAM45 error". This kind of errors is related to the degital spectrometre SAM45. When your observation suddenly stops with red messages such as "SAM45: XXXXX error" ("XXXXX" is changed the corresponding module that shows an error) on the COSMOS monitor, please follow the procedure below:
clearSAMand run the command.
clearSAMat one terminal and run
panda_reboot allin the other terminal.
clearSAM does not finish (repeat the process again and again).
Please inuput Ctrl+C at the terminal to end the process and report the details on #trouble_report channel at Rocket.Chat.
Unfortunately, you cannot continue your observation in that case.
The observatory will try hard to resolve the issue as soon as possible.
You may ignore the error massage "ERROR - LO2 unlock in IF** (**= 1～16)” displayed on the newif-pc terminal.
During the observation, the IF tuning program may suddenly stop without any error (sometimes, an error message appear on the COSMOS Monitor in the NRO_RemoteObs_1 viewer) This can be checked and fixed at the NRO_RemoteObs_4. Search the window with a title of "x0vncserver - TigerVNC".
If you cannot find it, double-click the icon "IF" on the desktop window in the NRO_RemoteObs_4 viewer.
In case that the program stops, the terminal waits for the input. However, please make sure the program acctually stops with the following process:
ps aux | grep newif.sh
If the result contains
/usr/bin/sh /home/45mrx/bin/newif.sh, the process is still alive (In this guide, the process is alive).
In this case, other cause that is not resolved yet would be a reason for the error.
Otherwise (the process is terminated), type the following command at the original terminal:
and close the new terminal that is used for checking the process.
You can do it at the web browser (Firefox) in the NRO_RemoteObs_3 viewer.