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With the waterfall timestamping added in 1.462, it seems like some visual correlation could be made between time and when a sweep crosses a frequency. However, finding a list of active sounders and their start time is needed and I have not had good luck finding that info.
Unfortunately the bulk of ionospheric sounders these days seem to be digital.
A list of stations can be found at http://digisonde.com
The two linear CWsweeps that can be observed in Europe most days, I believe originate from the UK Military site in Cyprus.
A GNU radio project https://www.sgo.fi/~j/gnu_chirp_sounder/ is about the only Chirp related project I've seen in recent times.
I was a member of the Chirps email list Chirps@aintel.bi.ehu.eus until the recent decision to close it due to lack of activity.
If you wish, I can send an email to Peter Martinez, to enquire about the current status of active swept CW sounders.
In SE Asia I still see quite a few traditional chirp sounders active. Although I can find the range to the GPS disciplined stations using Chirpview determining the location would require a Chirpview set-up at another location in the region. So if you can get hold of a recent list of these sounders that would be quite helpful.