11175 USB

[Josh]

HFGCS has been mighty quiet last few days, just heard the first emission a few minutes ago after several hours of monitoring.

2215Z 05JAN19
Last caller last caller this is RECKLESS RECKLESS how copy?

[MattCawby]

HFGCS has been mighty quiet last few days, just heard the first emission a few minutes ago after several hours of monitoring.

2215Z 05JAN19
Last caller last caller this is RECKLESS RECKLESS how copy?

RECKLESS broadcast a 116 character EAM at 2251z on 11175, good signal on the west coast

[Josh]

BEN HOGAN being checked into the net by EXTRADITE
1953Z 16JAN20

[Matt285]

Royal Arc calling Extension for authentication .Alpha Tango Echo, Charlie , Bravo Echo at 144 Zulu

[Josh]

PIONEER 08 calling MAINSAIL for pp 2105Z 19JAN20
Andrews requests PIONEER 08 qsy to discrete 09120
Pp traffic ensues on 9120

[Josh]

SPARE RIB with DSN pp via GRAPE VINE for analog and digital mux setup for station FARM BOY, then to PATHOLOGY, then station COOL AIR via RF12 and RF16
2214Z 21JAN20

[Matt285]

Seeing some new call signs here I wasn't familiar with.

[Josh]

Calls like SPARE RIB and the like are going to be per-mission or time based, in this case an E6 tacamo flight, where GRAPE VINE is the ground callsign of the station handling HFGCS comms to/from tacamo flights, perhaps Tinker AFB.

FARM BOY, PATHOLOGY, and COOL AIR are per-mission callsigns for the mux GEP, Ground Entry Points where the tacamo has a full duplex mux system in operation; the tacamo flight sends wideband fm uhf mux dowlink on one freq, the uplinked GEP sends on another freq. As the tacamo orbits, it loses contact with one GEP and switches to the other as it comes within range. These calls may never be used again but who knows.

[Josh]

ASCENSION in MAINSAIL guise responds to PYTHON 09 who is looking for a pp. ASCENSION requests  PYTHON 09 QSY to 13200 for pp. Both QSY to new QRG and called party isn't answering the phone. 2125Z 28JAN20

[Matt285]

I need to start writing down the calls I hear. I always try to check in on 11.175 on a daily basis. The first month or so I thought there were only five calls or so. Now I realize there are so many more. I will try to document better and post my findings.

[Token]

I need to start writing down the calls I hear. I always try to check in on 11.175 on a daily basis. The first month or so I thought there were only five calls or so. Now I realize there are so many more. I will try to document better and post my findings.

The rotating tactical callsigns (like the stations that send the EAMs and similar traffic) change every 24 hours and are selected randomly form a list.  This means they can repeat, be used again, but sometimes it takes years to get back around to a specific callsign, others never get reselected.  Other callsigns are permanent and follow the unit or the aircraft, things like SCARRY54, the REACH callsigns, etc.

T!

[Josh]

HAY HOOK calling FOOT HILL via pp for analog and digital on RF1 (UHF Mux) with station TECHNICAL (GEP).
1914Z 29JAN20

[Beerus Maximus]

11175 // 8992 has been busy this morning with PAID OFF broadcasting multiple EAMs, and then calling TELL TALE (no response) at 1607 UTC. During the EAM, RTTY data appeared right along side the voice audio on both frequencies.. sounds a lot like it is mixed in with the EAM audio itself from the same transmitter.

Another EAM from PAID off began at 1616 UTC, much stronger on both frequencies, and without the RTTY.

[Josh]

They often have the mixing console set wrong and feed S4481 at times along with EAMs. Also for giggles it was an old (1950s) US Army practice to send voice over fsk, and it worked fine. What I mean is a constant fsk bcast signal was mixed with voice  at the transmitter, the human at the other end just had to put up with the fsk, while the rrty machine ignored the voice traffic and continued to print.

[Ticom]

Hearing EMPHASIS(?) right now.