Token I went to several remote sites this afternoon and it may indeed be located in SoCal area. You might just be too close to it. Both SoCal remotes do not show the signal, but the Arizona station shows it quite well.
Now, the (2) north Canadian remotes show the signal very strong. That could just be their quiet locations.
For me locally, I notice the signal tends to fade in and out as if the antenna is rotating and/or varying the output power.
Nick, at ~2000 UTC the signal was S7 or better here locally, and I had a chance to take a good look at it. Still don’t know what it is, but more convinced than ever it is probably not a radar.
The pre-beep varies in length, I have seen everything from 0 to 35 millisec. Some pre-beeps are nice and steady, others sag or change freqs during the pre-beep. Some even have a little modulation on them. And the pre-beep freq moves around, not a great deal, but it does change.
The pre-beep is not anyplace near the center of the TX bandwidth.
The multiple tones during the transmission periods drift around a lot, even interpulse. For the first ~75 millisec the signal is unstable, and then it steadies out somewhat, never really getting stable.
Not sure if this whole thing is a sick transmitter or if it is meant to be this way.
By the way, I saw several power steps while I watched it, steps that could be beam steering and would support it being some kind of radar. However, the power steps also could have been the result of a broken transmitter, or if a data mode multiple nodes in the network. I am not talking fades, but honest steps in power.
T!