[Lowfer] VLF Tacamo RTTY

[Garry]

TACAMO has been active recently on 17.8, 22.7, and 27.2 kHz, but not 
knowing exactly when the transmissions start it's difficult to have RTTY 
software ready to decode the initial signals. Finally decided to launch 
MMTTY and MultiPSK in advance on 2 different setups, one tuned to 17.8 
kHz and the other tuned to 27.2 kHz. The former paid off earlier today 
with the following RTTY decodes:

CHANNEL ONE
  CHANNEL ONE
  CHANNEL ONE
  CHANNDL ONE
  CHANNEL ONE
  CHANNEL ONE
  CHANNEL ONE
  CHANNEL ONE
  CHANNEL ONE
  CHANNELKKKKKZCZCZCZXLLXLLXLL
ZZ
BT
FOURMA NOVMBSC
VICOR SIX
LFA SIX
GOLF GOLFQ
HOTEL SEVD
THGEE HOWEL
XRAX CHARLIE
ALSA FOXTRGT
XRAY DELTA
XRAY UNINBRM
SIX UNIFOU YANKEE PA ALFA

.

.

.

FOUR XRA
VICTHOTEL
XRAY CHARLIE
ALFA FOXTROT
XRAY DELTA
XRAY UNIFORM
SIX UNIFORM
INDIAYTH
EE
ZULU YANKEE
PAIA ALHO
BT
NNN
NNN
NNNN CHANNEL ONE
CHANNEL ONE

CHANNEL NZH

This was using MultiPSK 4.31.4 set for 50 baud, Mark/Space 957/1042 (85 
Hz shift), reverse reception. MMTTY using a 50 Hz shift rather than 85 
Hz produced no decodes. The signal wasn't strong, as evidenced by the 
numerous decoding errors, but it was strong enough something should have 
resulted. One of these days I'll be present when the RTTY appears and 
will try 85 Hz shift for MMTTY to see if that works.

73, Garry, K3SIW, EN52ta, Elgin, IL