Hi Steve and welcome to IIS forum.
That is interesting image you posted. I gave up on monitoring FM stations (my old AKAI tuner’s frequency was drifting badly anyhow) and got myself Alinco DJ-X11E. I know that’s not best choice but it was lowest priced wideband all mode receiver (scanner) I could find. Now I can monitor TV Video carrier on 64.260MHz from Coffs Harbour some 400km distant. With homemade folded dipole antenna pointing to zenith I get strong signal and hopefully avoid reflection from the aircraft – major flight path is about 15 km from my house and cuts right across the signal path.
On other channel I’m using Tecsun PL-600 portable radio tuning to Radio Australia on 31m band. I think that the transmitter is located around Townsville some 1500Km distant. It is only broadcaster on SW I can find here in Australia.
Your image is interesting because you can see Doppler shift of the reflections. All I can get so far is the carrier and sidebands getting brighter and on stronger reflections I can see the harmonics.
If anyone is interested in this have look at
http://www.tvcomm.co.uk/radio/.