tag:blogger.com,1999:blog-9071048343455395511.post2748113824301787883..comments2024-03-24T22:03:31.205+00:00Comments on Roger G3XBM's (Mainly) Amateur Radio Blog: 28MHz WSPR DXRoger G3XBMhttp://www.blogger.com/profile/13673890140751539870noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-9071048343455395511.post-11477399454046040692011-04-25T18:07:25.304+01:002011-04-25T18:07:25.304+01:00Looking on the net, VKJED's site suggests that...Looking on the net, <a href="http://www.qsl.net/vk3jed/doppler.html" rel="nofollow">VKJED's site</a> suggests that a speed of roughly 120 kph would be needed for a 3hz shift...not very fast at allJohn, EI7GLhttps://www.blogger.com/profile/02903298584057380083noreply@blogger.comtag:blogger.com,1999:blog-9071048343455395511.post-74385995050726197902011-04-25T16:25:00.689+01:002011-04-25T16:25:00.689+01:00Hugh
Yes, I have seen aircraft Doppler on 10m an...Hugh <br /><br />Yes, I have seen aircraft Doppler on 10m and 6m signals too, but usually only on semi-local up to 200km or so signals.<br /><br />73s RogerRoger G3XBMhttps://www.blogger.com/profile/13673890140751539870noreply@blogger.comtag:blogger.com,1999:blog-9071048343455395511.post-16047719163670790352011-04-25T13:06:51.181+01:002011-04-25T13:06:51.181+01:00The doppler shift can also be caused by the signal...The doppler shift can also be caused by the signals reflecting of an aircraft.. I have seen this a lot on 10m, with similar shifts (tens of Hz). I have also seen double-traces of the same station, one caused by the normal reflections, and one by the doppler-shifted aircraft signal. I live near Paris, so there are lots of aircraft near here :-) Hugh G6AIGAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-9071048343455395511.post-17508495154154393492011-04-25T06:13:44.369+01:002011-04-25T06:13:44.369+01:00Yes, you are right that there was no drift on the ...Yes, you are right that there was no drift on the CX station, just on the VK and FR paths over equator in the Indian Ocean direction.Roger G3XBMhttps://www.blogger.com/profile/13673890140751539870noreply@blogger.comtag:blogger.com,1999:blog-9071048343455395511.post-77764652583665707812011-04-24T22:32:23.855+01:002011-04-24T22:32:23.855+01:00With regard to the drift....The FR station is Fren...With regard to the drift....The FR station is French Renunion in the Indian Ocean rather than South America.<br /><br />Wonder if it had anything to do with their sunsets? The F2 layer gets lower and tilted as sunset approaches. Is it this movement in the F2 layer causing the drift?<br /><br />You would probably have to check and see if there was any drift on these stations well before their sunset.John, EI7GLhttps://www.blogger.com/profile/02903298584057380083noreply@blogger.comtag:blogger.com,1999:blog-9071048343455395511.post-20429443354819779172011-04-24T12:39:29.414+01:002011-04-24T12:39:29.414+01:00OK Roger, Condx on 10m seem to be improving; I was...OK Roger, Condx on 10m seem to be improving; I was heard at A45SWL with 5W RF into a G5RV jr on wspr as well this morning;<br /><br />2011-04-24 08:40 PA2RF 28.126160 -24 JO22gb 5 A45SWL <br /><br />We'll see what 2011 will offer.<br />All the best, 73 Ron<br />PA2RF<br />www.pi4raz.nlAnonymousnoreply@blogger.com