The combination of our Yaesu FT-817 radio, high quality feeder cable and Bill Watson’s carefully hand-made 5/8 vertical aerial (made to be resonant at 149.049MHz) at 2.4m height (top of log cabin – neighbour politics mean I can’t have it higher) has led to great success detecting meteors by radio scatter during this Lyrid meteor shower – the best detection rates we have ever had in Lichfield. This demonstrates the importance of using a sensitive modern radio and a resonant aerial when detecting meteors.
I have also spent today trying to get FunCube Dongle Pro Plus working – without success!! I need help with this!
We proved that 143.049MHz Upper Side Band (on Yaesu appears as 143.049.00 R MHz USB) is a good frequency to detect meteors, the carrier for Graves appears intermittently and then goes again, when it does appear it varies up and down consistent with pulses from the radar, and that a resonant aerial is required.
Best screenshots from the Lyrid Meteor Shower 20-23/4/2017:
Following shows 2 typical meteor peaks but also shows Graves carrier which is usually not seen – meteor frequency is offset from the carrier.
2 meteors – these are probably 2 fragments of same meteor coming in one after the other:
Large rolling meteor – up and down with time as surface area increases and decreases with roll of meteor (below):
3 successive meteors:
Meteor below shows variation on frequency axis – this is due to multiple fragments together travelling at slightly different speeds – Doppler effect changes frequency:
Excellent example below of large rolling meteor:
Screenshots below show the 3D Spectrum Lab screenshot and also the WSJT-10 waterfall – this shows the ping that is seen and also heard if the computer’s speakers are turned on (audible ping not recorded here):