Mr Godfrey explained radio signals acted like invisible “tripwires” in the sky.
He said his theory that the pilot of the doomed flight deliberately tried to avoid detection was now a “working hypothesis” thanks to the technique.
The data revealed the plane turned multiple times as though to shake off aircraft tracking technology before plummeting into the southern Indian Ocean, he said.
Mr Godfrey, who is investigating the crash with the so-called Independent Group of Scientists, indicated the plane’s flight path was “significantly different” from earlier theories based on satellite data.
He claimed pilot Zaharie Ahmad Shah took a series of turns and alternated the speed of the MH370 to leave “false trails” on unofficial routes while avoiding commercial flight routes.
Airlineratings.com quoted Mr Godfrey saying: “I would no longer characterise the track in the new paper as speculative but a working hypothesis.
“The MH370 flight path I have proposed is a hypothesis supported by a body of evidence in the form of a large number of position and progress indicators.
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“The working hypothesis will remain valid until someone proves it wrong by presenting evidence that this flight path was not followed.
“One possibility would be the publication of raw radar data for example.”
Amateur radio sleuth and WSPR expert John Moore played down the accuracy of the technique but said it could also be used to detect UFOs.
He told the Daily Star: “Of course we also know that this mode of propagation doesn’t work on HF, even over short distances due to the well-understood relationship between the aircraft surface area versus wavelength.
“Short of a really big and reflective UFO over the Indian ocean, the WSPR theory falls well short in my opinion.”
Mr Godfrey previously said: “WSPR is like a bunch of tripwires or laser beams, but they work in every direction over the horizon to the other side of the globe.
“The pilot of MH370 generally avoided official flight routes from 18:00 UTC (2:00am AWST) onwards but used waypoints to navigate on unofficial flight paths in the Malacca Strait, around Sumatra and across the Southern Indian Ocean.”
He added: “The flight path follows the coast of Sumatra and flies close to Banda Aceh Airport.”