Changes between Version 8 and Version 9 of PublicPages/MayallZbandLegacy/NotesforObservers/Problems

Timestamp:

Feb 5, 2016 5:00:40 AM (8 years ago)

Author:

Arjun Dey

Comment:

--

PublicPages/MayallZbandLegacy/NotesforObservers/Problems

@@ -58 +58 @@
 Log all the images that had identical READTIME values. 
 
-=== 5. Focus drifting ===
+=== 5. Detector Timeouts ===
 
-If you lose track of the focus and don’t know whether you are below or above the focus value, stop the observing script by using CTRL-C, waiting for the readout to complete and the “DONE” to appear on the NMSL window, and then execute
+Occasionally, the numbers on the countdown timer on the NMSL GUI will turn red during readout, and the timer will read down to -105 or so. 
+When this happens, it usually means that the image is lost. You can try the following:
+       - ditscmd nohs nohs_endobs
+       - nocs nmsl reset
+Then try taking a zero image. See if it reads out, and check the image using mscstat. 
+If it looks ok, you can start a new observing script. 
+However, pay attention to make sure that the next few images are written out.
+
+=== 6. Focus drifting ===
+
+If you lose track of the focus and don’t know whether you are below or above the focus value, wait for the readout countdown to start 
+and then type CTRL-C  in the window executing the script. Wait for the readout to complete and the “DONE” to appear on the NMSL window.
+Then execute
         - ditscmd nohs nohs_endobs
 Then do a focus sequence. 
@@ -82 +94 @@
         - Restart observing
 
-=== 6. Images of stars on the guider are bouncing around ===
+=== 7. Images of stars on the guider are bouncing around ===
         - If the wind is high, ask the OA to close the louvers