Taking advantage of your post here, I pop up just a minute to say this:
I'm still very much convinced that the two bottom glyphs ARE NOT RELATED TO THE TOP ONES.
They are too much different in size and spacing to be related: they are a red herring.
I've the clearest image of the spectrogram ever made in front of me now, and those two bottom symbols seems more to me like:
| - - FROM TO - - |
So what if the circle is not four quadrants but just two halves?
And they are telling us WHERE the UP ARE right now?
I mean the UP SHELL location?
A map for them then?
The left part is the FROM and the right part is the TO. A RANGE.
Like the UA bubble that is 135 to 150 Ly from Merope.
Cheers CMDRs
http://i.imgur.com/Mt1aK6i.jpg