I have been doing some comparisons to the image found in the UP audio and our ships scanner screen.
Working on the presumptions that the quadrants are labeled in binary, and that each quadrant is depicting the top/front of our scanner, here is what I find -
1. The line could be like on our scanners, when a body is below us or above us.
2. This may be saying the body should be positioned within the middle ring on our scanners. If you look on your scanner you will different rings that move out from the centre, showing distance.
3. The may be saying that the body should be below us enough to show two grey rings on our scanner. When in proximity to a body it will show rings around it
4. This could be saying to go this direction or look this way, on our scanners we have similar two lines representing our FOV and direction of travel.
I'm sorry if any part of what I'm suggesting is unclear, I am trying my best to explain what I mean. I have provided a screenshot of what I was looking at when I thought of all this. It isn't the right body obviously just some star I'm at but I tried to position my ship roughly to show each symbol and why I think they are similar to the symbols our scanner uses.
http://i.imgur.com/I895dgI.jpg