[Lowfer] TACAMO 17.8 kHz et al

[Howell, Laurence J]

Just a few brighter pixels from Bob XBA/1 last night but could have been an infinite number of monkeys. NAA peaked about 4dB lower with about the same level of noise floor as 24 hours earlier.


Herea 90sec per sample wideband view using the L400b from here in Alaska - and NAA still isn't a huge signal here. Not seen a lot of Tacamo over the past 24 hours on anything I can see..

http://kl7l.com/Wideband11thMarch14.jpg


Laurence KL7 L WH2XBA/5 etc






In regard to the latest message "29.499 tonight OP2H starts 2330..." 
from Jack, WA9FVP,

I and others participating on this list are quite familiar with TACAMO 
(http://en.wikipedia.org/wiki/TACAMO) and the frequencies where it often 
appears. It does not transmit long, normally just a few minutes. It 
normally begins with 50 Baud RTTY, then switches to very wide band MSK, 
then less wide MSK. People on this list are also familiar with the 24/7 
military transmitters like NAA on 24 kHz. Jay, W1VD has an extensive 
list of currently active VLF sources at http://www.w1vd.com/vlf.html. 
You can also get a feel for who you're hearing by searching "other" and 
frequencies below 100 kHz at 
http://www.classaxe.com/dx/ndb/rna/signal_list (the European listings 
are even more extensive).

-- 
73, Garry, K3SIW, EN52ta, Elgin, IL
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