jks

[re-uploaded image below]

I found that on some weaker sources increasing the gate time to 1 msec (1000 usec on the slider) improved the noise reduction.

It's a plot of a ground wave TDoA solution for DCF77 using three Kiwis relatively close by.

When you include the --kiwi-wav flag the GPS timestamps will also be added to the files when recording in IQ mode. This will allow post-processing the data for the very interesting projects now ongoing: Christoph's HFDF work and zfyoung's diversity reception.

It's a plot of a ground wave TDoA solution for DCF77 using three Kiwis relatively close by.

It is important to note that V/UHF DF is significantly different from the HFDF problem due to the issues imposed by the nature of the ionosphere at HF. It is much more complicated than you would expect. But we have this wonderful resource: lots of geographically diverse Kiwi installations and now GPS timestamped IQ data thanks to Christoph's recent work (https://github.com/jks-prv/Beagle_SDR_GPS/issues/130)

A recent example of V/UHF DF using RTL-SDRs: https://www.rtl-sdr.com/localizing-transmitters-to-within-a-few-meters-with-tdoa-and-rtl-sdr-dongles/

Note that for the WSPR extension the freq shown in the status panel, admin page, etc. is the PB center instead of the carrier freq (dial freq) The dial freq for WSPR should be 14096.35 (750 Hz lower than 14097.10) unless you've changed the WSPR offset value on the admin page. You will see the dial freq in the frequency entry box when the WSPR extension is closed. I can't remember exactly why I did this, but my guess is that I thought it made sense to show the more familiar PB center freq for WSPR that everyone is used to.

WWVH @ 15 MHz was only off 8 Hz. There were no recent GPS solutions because all the sats had drifted out of range and the acquisition process was getting locked out by the three running WSPRs.