Differences

This shows you the differences between two versions of the page.

--- ssp_procedures [2025/06/22 21:41] – ssp
+++ ssp_procedures [2025/07/03 14:10] (current) – astroadmin
@@ Line 175: / Line 175: @@
   - Try jogging the telescope away and back
   - Instead of five 1-min exposures, take ten 30-sec exposures.
+**"SHUTTER ERROR" appears on the status of the ACP dome control window.** - **FIRST** Please check using the tmocam if the shutter is partially opened or closed. **If the shutter is not fully closed / opened when this error occurs, stop everything and call Zach! (or if ACP asks you to "Force close the dome"**. If the shutter is fully open or closed, proceed with the following:
+This tends to happen exclusively when the shutter is near-ish the scope's park position (Aziumuth ~110). Some variation in the metal / position causes the physical dome shutter switch to no longer be triggered / read in this very particular spot. If you see this **DO NOT FREAK OUT**! This is a recoverable error! If you need to move the dome out of the position that is causing "SHUTTER ERROR", please do the following:
+  - Park the dome (no need to close assuming you'll be continuing observing!)
+  - Slew the telescope to the desired position.
+  - Use the bottom most / longest button on the ACP Dome Control window labeled "Unpark/Unhome" (this will unpark the scope and slew it to the scope. May also have to select "Slave to telescope".)
+  - And that's it!
+While it is certainly concerning to see "SHUTTER ERROR" - it is non-critical in of itself. As long as the shutter does not close while reading the shutter error code, it's fine! And the behavior of the dome has been changed such that the dome must first slew to the park position (a place that has never prompted this particular error) before closing.
+This error is very intermittent and some night you will not see it. While other nights you may see it constantly. **If you see it during a night, please inform the late shift TA!** While this error is non-critical for manaul observers, it will cause error for the scheduler! If this "SHUTTER ERROR" seems to be common in the night, it would be best just to close down (park) everything rather than starting ACP Scheduler.
+Note, while it is known by Zach and Jon to happen in a very particular spot, there's the possibility it happens else where! If it happens, please inform Zach regardless of if you were able to recover it yourself or not.