Undecodeable signals

[ka3jjz]

Eventually while tuning the bands, you're likely to come across some RTTY like sounds that you will not be able to decode. These are often military in nature, running NATO-50 or 75 baud with lots of encryption. There's nothing in the normal realm that will decode these. Mike Chace-Ortiz put a list of frequencies and sites together using the new TDoA function recently added to Kiwi SDRs. I will make one correction to the list - 9830 is Davidsonville, Md, Not PR as found in some follow up observations. This list is courtesy of the UDXF

4005 is Davidsonville, MD
4985 is Davidsonville, MD
5340 is Isabela, PR
6487 is Davidsonville, MD
6831 is Isabela, PR
7455 is Isabela, PR
7597 is Dixon, CA
7830 is Isabela, PR
8093 is Diego Garcia
8547 is Diego Garcia
8676 is Lualualei, HI
8694 is Dixon, CA
9112 is Lualualei, HI (seems to be occasional)
9830 is Isabela, PR (now determined to be Davidsonville, MD)
10153 is Isabela, PR
10430 is Dixon, CA
11688 is Isabela, PR
12015 is Davidsonville, MD
12120 is Isabela, PR
13229 is Isabela, PR (only active briefly in November)
13870 is Dixon, CA
14434 is Lualualei, HI
15959 is Davidsonville, MD
16047 is Lualualei, HI (seems to be occasional)
16123 is Isabela, PR
16268.5 is Dixon, CA
18370 is Guam (seems to be occasional)
18558 is Lualualei, HI (seems to be occasional)
22471 is Diego Garcia
22910 is Diego Garcia

For an explanation of TDoA, see this link...

KiwiSDR network adds Time Difference of Arrival direction-finding functionality

Mike