Information on the use of WSPR to search for Flight MH370 has been trickling out since Spring. Finding the whole thing interesting, I’ve assembled a set of links to explore the methodology.
The analysis explained:
In a Nov. 30 report (pdf), the engineer said he had analyzed the plane’s flight path and final movements using Global Detection and Tracking of Any Aircraft Anywhere (GDTAAA) software based on the Weak Signal Propagation Reporter (WSPR) data publicly available on WSPRnet.
“The WSPRnet data provides hundreds of radio signals every two minutes during the flight of MH370,” Godfrey wrote in the report. “These radio signals propagate around the globe between transmitters and receivers with help of refraction in the ionosphere. The path of an aircraft can disturb the propagation path of the radio waves.
“A single WSPRnet signal disturbance is a candidate progress indicator, multiple WSPRnet signal disturbances are a candidate position indicator, where two or more propagation paths cross at a particular location.”
Lengthy articles (dated Dec 1st, 2021):
https://www.theepochtimes.com/british-aerospace-engineer-claims-mh370-wreck-lies-4-kilometers-deep-in-indian-ocean_4132517.html or https://www.ntd.com/british-aerospace-engineer-claims-mh370-wreck-lies-4-kilometers-deep-in-indian-ocean_708479.html
The Findings:
https://www.dropbox.com/s/kvu3kpu7kpjvjin/GDTAAA%20WSPRnet%20MH370%20Analysis%20Preliminary%20Findings.pdf
More on Methodology:
https://www.dropbox.com/s/weu4h7154lqtt62/Geocaching%20in%20the%20Ionosphere.pdf
WSPRnet Homepage:
http://www.wsprnet.org/
About WSPR:
https://infogalactic.com/info/WSPR_(amateur_radio_software)
A page of Videos Explaining WSPR:
https://vk3ye.com/gateway/wspr.htm
The pdfs have links to the various Search for MH370 websites, if that is your interest!
73
Steve
K9ZW
With Varying Frequency - Amateur Radio Ponderings 
I’m having a hard time making sense of whisper net. They mention ‘hundreds of radio transmissions every two minutes’ which sounds like someone is transmitting on a regular basis, but I found no mention of who or what was transmitting.
Hi Charles
This is a bit counterintuitive, as WSPRnet is largely about whether you receive or do not receive signals than the signal’s content.
An analogy would be how bats, dolphins and some birds navigate using either signals they “ping” or the effects on signals they other hear.
Perhaps the videos can help explain it a bit more.
73
Steve
K9ZW