Hi All, >Evidently what's puzzling you is Doppler shifts that remain nearly constant for a minute or so. Aircraft at 10,000 meters can be line-of-sight visible at distances up to several hundred km. With typical aircraft speeds, in such cases the geometry for bi-static reflections will not change much over a minute. So the Doppler shift can remain nearly constant. Does this not make sense?
-- Joe, K1JT I could add that this may also explain why those ghosts appear and fade out fast as the reflection point moves over the edge of the ES cloud. If we knew airplane location we could estimate where the ES cloud is. 73, Reino, oh3ma _______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel