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NotesforObservers

-                      v175
+                      v176
 **pass3** is the filler or worst pass executed when conditions are bad. Seeing > 1.3'' and its not photometric (trans < 90%). Pass3 may be done in good conditions when no pass1 or pass2 tiles are available.
+Or, in more concise language:
+{{{
+Pass 1 requires transparency > 0.9 AND seeing < 1.25 AND brightness < 0.25 brighter than nominal
+Pass 2 requires (transparency > 0.9 AND seeing < 2.0) OR (transparency > 0.7 AND seeing < 1.25)
+}}}
 If you want to use only pass2 or pass3 on a given night (because, say, there is high cirrus and you are sure the night will not be photometric), then create a file called "nopass1" (by typing "touch nopass1") in the ~/exec/mosbot directory. This will restrict mosbot to choose only between passes 2 and 3.