jks

In the case of the BBAI:

https://elinux.org/Beagleboard:BeagleBoneBlack_Debian#i_take_full_responsibility_for_knowing_my_beagle_is_now_insecure

I'm not an expert, but I think the short answer is no.

Forgetting about GPS time-stamping of the IQ samples for the moment, one thing the GPS does is correct for any error in the ADC clock. Improving the characteristics of that clock doesn't really matter. Maybe a clock with an improvement in the short term Allan variance (frequency stability) would be of some use. I don't know. Glenn will have something to say about this since he's done exactly what you're proposing (attaching an external Rb frequency standard).

The Kiwi has no provision for attachment of an external 1 PPS input from a GPS receiver that is specifically designed to be a timing receiver (such a distinction exists). That said, the performance of the positioning (hence timing) of the current code, thanks to Christoph's work, is pretty good. The best way to maximize GPS performance is by using a GPS active timing antenna mounted outside in the clear using good low-loss feed line.

There are many other factors that influence the accuracy and resolution of the TDoA solutions. See Christoph's 2019 SDRA talk for full details: https://www.youtube.com/watch?v=LpFoM_lBgxg

The other important point to realize is that Kiwi TDoA is not a "push button" application. It takes an amount of skill, repetition and luck to get good results, especially at HF. Professional SIGINT personnel go through considerable training to be able to manage the tools they have and interpret the results.

Thanks for pointing out that Chuck is running RaspPIs (I checked, he has one that is public and no KiwiSDRs).

So Chuck is no longer with us. He can use the RaspPi forum for his questions.

Anything new about this? Could it be related to the Comcast/Xfinity problem others have had recently?