Listen to the transmission given by the unknown link starting around 23 seconds in the following video for example:
https://www.youtube.com/watch?v=O2x3i3_ZqbM
The transmission consists of high and low notes in segments of three separated by warbles and delays. The first number in the video would be...
> HLH HLH <warble> HHL LLL LHL (0:23-0:32 in the video)
Where 'H' stands for a high frequency note and 'L' for a low frequency note. Each high frequency note represents binary 0 and low frequency note represents 1. This gives the following binary numbers:
> 010010 <warble> 001111101
Throwing these in any binary to decimal converter (first result on google:
http://www.binaryhexconverter.com/binary-to-decimal-converter) should give the following decimal representation.
> 18 <warble> 125
The final part to the decoding is to realize that the <warble> stands in for a division, yielding the 18 / 125 fraction.
There's three different transmission so this gives us the following fractions:
Code:
I: 157/1000 31/1000 24/25 or in decimal 0.157 0.031 0.960
II: 18/125 31/1000 189/200 or in decimal 0.144 0.031 0.945
III: 151/1000 1/25 937/1000 or in decimal 0.151 0.040 0.937
These were hypothesized to represent distances from unknown systems to specific reference systems, as in... system I would be 0.157 units from reference 1, 0.031 units from reference 2, 0.960 units from reference 3. We made the following educated assumptions:
- The unit of distance is the same that the Unknown Probe used: 871.018 Ly (distance between Merope and Col 70 Sector FY-N c21-3).
- Reference 1 is Merope.
- Reference 2 is HIP 14919.
- Reference 3 is Col 70 Sector FY-N C21-3.
So for system I we'd be trying to find a system that is...
- 871.018 *
0.157 light years from
Merope
- 871.018 *
0.031 light years from
HIP 14919
- 871.018 *
0.960 light years from
Col 70 Sector FY-N c21-3
We can come up with good match for systems I and III but the numbers representing system II don't have a likely candidate that I've found.
My brute force approach for finding the final list of systems was to use the EDDB data set to find all the systems near Merope and check which ones of these are within the required distances of the reference systems. The fastest way for this is to download the systems data set from eddb or edsm (
https://eddb.io/api), load it up in a proper database - I used MongoDB but an SQL database should work just fine and query it given the conditions. Downside with this approach is that it misses any system which isn't mapped in EDSM.