Just looked up the single 14-bit value in the first message segment. This is the result:
8217
Dare I suggest this is a distance in LY? 8217LY to be specific... As the target system has already been located (Pleiades Sector IH-V C2-5), I have to ask if there are any systems exactly 8217 LY from there?
Source: http://www.yougonumbers.com/binary/10000000011001
Also if converted to hex it reads "2019". Year? (source http://www.rapidtables.com/convert/number/binary-to-hex.htm and enter the code: 10000000011001)