-70 Hz at 50.313 MHz is a relative velocity of about -209 m/s or -468 mph. That's in the ballpark for a jet aircraft.
On Jul 7, 2019, at 10:19, Rich Zwirko - K1HTV <k1...@comcast.net<mailto:k1...@comcast.net>> wrote: Reino, Yes, the main stronger FT8 signal is the one heard directly. The Doppler shifted signals, reflected from the direction of a strong Es cloud, are usually between 40 and over 100 Hz lower, with the average of around -70 Hz. 73, Rich - K1HTV = = = From: Reino Talarmo <reino.tala...@kolumbus.fi<mailto:reino.tala...@kolumbus.fi>> To: "'WSJT software development'" <wsjt-devel@lists.sourceforge.net<mailto:wsjt-devel@lists.sourceforge.net>> Cc: Bcc: Date: Sun, 7 Jul 2019 11:10:57 +0300 Subject: Re: [wsjt-devel] FT8 ghost signals Hi All, Perhaps this a wrong forum, but still I like to ask how you explain ghost signals with varying frequency offset? Do you have both a direct signal and an ES reflection from a moving cloud? 73, Reino oh3ma _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net<mailto:wsjt-devel@lists.sourceforge.net> https://lists.sourceforge.net/lists/listinfo/wsjt-devel
_______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
