HFU HF Underground
Technical Topics => Equipment => Topic started by: GC on July 12, 2018, 1430 UTC
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As some may have already heard, the KiwiSDR network has had a new feature added to it's already impressive capabilities and that new capability is the ability to do Time Difference of Arrival ( TDoA ) in near real time on LF/MF/HF signals.
first post (that I noted) on the development was here:
https://www.rtl-sdr.com/locating-various-hf-transmitters-and-number-stations-with-kiwisdrs/ (https://www.rtl-sdr.com/locating-various-hf-transmitters-and-number-stations-with-kiwisdrs/)
The authors very interesting web page here with lots of details on this and other interesting topics:
http://hcab14.blogspot.com/ (http://hcab14.blogspot.com/)
a follow up on the first link here:
https://www.rtl-sdr.com/kiwisdr-tdoa-direction-finding-now-freely-available-for-public-use/ (https://www.rtl-sdr.com/kiwisdr-tdoa-direction-finding-now-freely-available-for-public-use/)
and a posting on qrz.com on someone's first use of this KiwiSDR capability and using to located the UNID 1 PPS PIP/tick/time pulse:
https://forums.qrz.com/index.php?threads/time-signal-intruder.614510/page-31#post-4727876 (https://forums.qrz.com/index.php?threads/time-signal-intruder.614510/page-31#post-4727876)
I tried this technique last evening and my results were similar to those described by the poster on qrz.com
cheers, Graham near Ottawa Canada
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This pleases me. I'm in the midst of designing and constructing a hfdf system for home use based on the mfj 1025. The diff between me and the kiwi df sys is all I can get is a azimuth to the transmitter, kiwi is able to narrow it down to a specific tx location, and the more kiwis in operation the finer the resolution it will have.
Take that, wullenweber!