9031 kHz Investigational Stream #2 (PLEASE READ DESCRIPTION.)

I normally run streams of 11175 kHz, a known HFGCS frequency, to monitor for EAMs. Those streams are run as a redundancy to https://eam.watch's automated recording bot. eam.watch's is currently up and working l so I am taking advantage of the opportunity to monitor 9031 kHz.

It is not known to be an HFGCS frequency; however it has previously been documented as being used by STRATCOM as the "CHARLIE ECHO WINDOW" frequency, and I heard it used as such in April 2023, when operators switched to it after discussing the "CHARLIE ECHO WINDOW" on usual HFGCS frequencies.

It seems like this happened again this week, and on switching to 9031 kHz, a digital signal was present on the frequency. However, a few people have indicated to me that this signal is thought to be from the Israeli Navy – https://www.sigidwiki.com/wiki/Israeli_Navy_Hybrid_Modem_(188-110_MOD) – and because it's a signal I've noticed when randomly tuning into the frequency by chance, but there doesn't seem to be a ton of information on the schedule/nature of those broadcasts, I'd like to look into it myself and so I'll be randomly streaming 9031 kHz in an unscheduled fashion to get an idea of what broadcasts on it and when.

In terms of what anyone who randomly tunes in could expect from this stream; this is an entirely utilitarian stream and commentary will be minimal (slash not at all); see chatbox for conversation if any. For those more familiar; I am not actually expecting *any* US military traffic, and the chance of voice traffic on the frequency of any kind is extremely low to not at all.

Follow me on Twitter for regular news and updates: https://www.twitter.com/02_0279
Follow my other Youtube channel for other content, including long-form updates on HFGCS activity: https://www.youtube.com/channel/UClkhFT1cCW2aiwuZDcKy0gw

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Thanks to all previous and continuing contributors for their support.

Streams sources may include the following;
Florida – http://sdr.n4but.com
Alberta, Canada – 209.115.233.71:8073
Montana, USA – http://kiwi.foxgulch.net
Twente, Netherlands – http://websdr.ewi.utwente.nl:8901
Utah – http://websdr3.sdrutah.org:8903/index1a.html?tune=8992khz

Streams may be archived after conclusion. Let me know if you have any more questions – you can contact me either by chatbox or by reaching out to me on Twitter. For any serious communications, you may request my e-mail address via Twitter.