When you put down a Signal Booster Device and look at it you will see the coordinates of where you are at in the Galaxy. It will be a 5 digit Text only location of your whereabouts in the system followed by 4 sets of 4 digit hexidecimal coordinates representing the Region of the Galaxy in X,Y and Z as well as a number that represents the location of the System in the region.
Looks something like this HAJAI:07FE:0087:07FD:000C.
[HAJAI] is your location in the System.
[07FE] is the X Coordinates of the Region of the Galaxy.
 is the Y Coordinates of the Region of the Galaxy.
[07FD] is the Z Coordinates of the Region of the Galaxy.
[000C] is the System Location in the Region.
X is your Left Right direction on the Galactic Map, Z is your other 2 directions on the Horizontal Plane of the Galaxy and Y is the Up and Down Direction as when you are swimming in water. The System location code is linear from 1 in hex and a bit over 600 in decimal.
Pahefu has made the Pilgrims Star Path Website to convert what you get from the Signal Boosters and just change them into location in the Galactic Map or you can even use the feature that lets you convert them into Portal Glyph Coordinates.
Pilgrim Star Path App ----> https://pahefu.github.io/pilgrimstarpath/
I love this stuff and spent many weeks working on the System Coordinate part of the location. I still don’t know how that works but with the Portals working you don’t really need to understand that now.
The Mysteries of No Man’s Sky Still Remain