TDoA Direction Finding: First Experiences on the KiwiSDR Net
With some iteration, as described in the PDF, the former unknown site of a CIS-12 transmission on 6.465 kHz has been disclosed as the Russian Navy from Baltysk, Kaliningrad.
The stunning direction finding tool on the KiwiSDR net has hit the community. Most people are enthusiastic about the new horizons, some some smart people had opened for free.
A few people, however, reported some disappointment as they couldn’t pinpoint each and every transmitter with expected high precision.
To avoid this disappointment, you have to know what you are doing. The TDoA tool for direction finding indeed delivers automatically stunning results. But you have to think a bit about the setup, and also do some iteration.
I wrapped up my first experiences with TDoA in this PDF. You may simply download it by double-clicking the link, and open it in a PDF reader. It consists of 22 pages and 37 instructive figures. I greatly stressed the practical part of direction finding with this tool – with 13 explicit case studies from 2,6 MHz to 15,6 MHz.
The idea is to have more fun by getting the most reliable results.
Nils Schiffhauer – DK8OK 
LOVE this, Nils, thank you so much.
… thanks, and a few typos just had been corrected … 73 Nils, DK8OK
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Excellent work Nils. Thank you so much. If anyone is interested we are always looking for more Kiwis to be added to the network. Information is available on our website kiwisdr.com and forum http://valentfx.com/vanilla/discussions
Cheers & 73, John, ZL/KF6VO, KiwiSDR
Erstkassig, wie immer lieber Nils. Thank you very much.
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Thanks, and I was pleased having been a guest at your station (and hope to visit it many times in the future!). 73 Nils, DK8OK
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Interesting app for the dxers to know for ex. where some unknown clandestine station works. Some pirates may be unhappy for this invention.
… thanks, but the pirates are nailed by governmental direction finding with even better equipment, more money, more time etc … 73 Nils, DK8OK
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It appears Receiver A and Receiver B are transposed in Figure 1 on page 2? At least, according to those graphs, Receiver B picked up the signal before Receiver A, and with higher amplitude.
Great document, really good job showing examples of direct hits and near misses. Thanks!
… thanks, you are right (of course …). 73 Nils, DK8OK
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