I think I've seen something similar during and after geomagnetic storms - weaker than usual signals, but very low and steady Doppler shifts. It will be interesting to see how things change when solar activity increases.
The QS1R is a great receiver. Even with the original TCXO I could see WWV on 10 and 15 MHz track within 2e-09 while CHU in eastern Canada would have a shift of nearly 1 Hz. As long as you're not dealing with voice signals a pretty modest antenna will probably do. I use a bandwidth of 20 Hz for carrier level measurements, but the Fldigi would be fine with a wide bandwidth. Who knew unmodulated carriers could be fun? Rob > On Nov 28, 2018, at 1:15 AM, Bill Dailey <docdai...@gmail.com> wrote: > > I used to measure WWV carrier only (a much more pedestrian approach than > yours) with a qs1r locked to a Valon synthesizer driven by a a very nice (for > my budget) 1000A oscillator that Corby provided me. > > I often saw (now I could be reading your data wrong) a minimal shift when the > signal strength was very low. I researched this phenomenon for quite some > time and my hypothesis was that this represents a point where you receive > only non-Doppler shifted signal via pure reflection at the ionospher. From > the papers is read this component is always received but it is buried within > the usually stronger shifted components. If I remember right there is a name > for that direct (non-shifted) component but it escapes me. > > I then moved, got busy and haven’t gotten an antenna back up. Your results > make me want to get less busy again. > > Thanks, > > Bill Dailey _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.