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--- chara:discussion_of_alignment_procedures [2024/04/03 15:18]
gail_stargazer
+++ chara:discussion_of_alignment_procedures [2024/04/23 08:20] (current)
denis [Current Alignment Sequence]
@@ Line 28: / Line 28: @@
   * When slewing to next star, send M7 to default position and repeat.
-==== New Alignment Sequence ====
+==== Current Alignment Sequence ====
 Implemented January-July 2023
@@ Line 39: / Line 39: @@
   * Align blue beacon to labAO using dichroic.
       * <font inherit/inherit;;#2980b9;;transparent>I do not understand why M2 corner cube is not used here, with laser coming from lab as in original sequence? I think it is the only way to orient the dichroic.</font>
-      * <font inherit/inherit;;#cc0000;;inherit>The laser/cc is not used for the fine alignment for the same reason the acq camera is not used for aligning the red beacon to tel wfs. The ao system aligns to sub arcsec.</font><font inherit/inherit;;#8e44ad;;inherit>I do not believe the laser has ever been used to align during observing since the AO system has been installed. I have never used it or the corner cube. The cc is at times unreliable and can get lost or stuck. The laser spots can be seen without the corner cube if needed to realign the dichroic. What are we to see or align with the laser and corner cube that we don’t see without?</font>  * Focus blue beacon on labAO and red becaon on TelWFS.
+      * <font inherit/inherit;;#cc0000;;inherit>The laser/cc is not used for the fine alignment for the same reason the acq camera is not used for aligning the red beacon to tel wfs. The ao system aligns to sub arcsec.</font><font inherit/inherit;;#8e44ad;;inherit>I do not believe the laser has ever been used to align during observing since the AO system has been installed. I have never used it or the corner cube. The cc is at times unreliable and can get lost or stuck. The laser spots can be seen without the corner cube if needed to realign the dichroic. What are we to see or align with the laser and corner cube that we don’t see without?</font>* Focus blue beacon on labAO and red becaon on TelWFS.
   * If aberration terms are high, ZERO CENTROIDS to adjust relative positions of the boxes.
@@ Line 54: / Line 54: @@
   * If coma and astigmatism high, create sky flat on bright star - Turn off **[DM]**, **[SV FLT]**, **[FLATEN]**, then relock the **[DM]**.
   * For IR combiners, move beacon flat to align star to STST.
-  * For SPICA, move beacon flat to align star on SPICA FTT.
+  * For SPICA, move beacon flat to align star on SPICA FTT. <font inherit/inherit;;#16a085;;inherit>(denis: we validated the combined method BF+M7 on E1 on April 23 and it did excellent worj, permitting to use the Right/Left,Up/Down axes of the IPDET to put the star in the FTT boxes.)</font>* Star Acquired.
-  * Star Acquired.
+  * <font inherit/inherit;;#1abc9c;;inherit>(denis: when FTT is locked turn on the offload to keep the alignment during tracking =⇒ good for FTT and good for Alignment. This has been successfully implemented in April 2024)</font>* When slewing to the next star, DO NOT send M7 to default. If next star is bright, then align beacon flat to center star on STST/SPICA FTT. If star is faint, keep beacon flat fixed or align beacon flat to center red beacon in offset beacon boxes on TelWFS.
-  * When slewing to the next star, DO NOT send M7 to default. If next star is bright, then align beacon flat to center star on STST/SPICA FTT. If star is faint, keep beacon flat fixed or align beacon flat to center red beacon in offset beacon boxes on TelWFS.
 ==== Proposed Revisions to Current Alignment Sequence ====

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