During the science day, the RAG team helped my erect a 4.8m ex-military aerial (purchased from ebay few years ago for around £30) – I attached to the top of this Bill Watson’s homemade Slim-Jim aerial, purpose-cut for 143.049MHz. Using my Yaesu FT-817 radio, I set about trying to detect meteors from Graves radar in France by radio scatter at 143.049MHz upper side band and……….
My best detections ever!! The meteors were coming thick and fast – sometimes 3 on the screen at any one time on Spectrum Lab! I have NEVER detected meteors so well as I did today. A true WOW! moment.
Below are pictures from the event and some examples of meteors detected (WSJT-10 and Spectrum Lab software screenshots) – a more comprehensive account of meteors detected can be found in PDF format by clicking of this link: Meteor detection screenshots 290417
Photos of the event:
Photos of meteors detected during the day at the forestry centre using the radio and aerial above:
The following screenshot from Spectrum Lab shows the carrier from Graves (usually not seen but atmospheric conditions today meant it was intermittently visible) and two meteors (showing offset between meteors and the carrier of around 200Hz)
The screenshot below shows that the carrier is usually not seen. In addition, these meteors have spread on the frequency axis – indicating doppler shift in speed in components of the meteor (slightly different speeds of travel)
Other good examples of meteors on Spectrum Lab screenshots:
Meteors were also shown on WSJT-10 software waterfall traces – each time a meteor appeared on either WSJT-10 (below – the peaks on green trace + coloured spot above it – see for example second line on screenshot below where four meteors are shown) an audible ping could be heard from the laptop speakers.
Interpretation of above WSJT-10 screenshot:
Other good examples of WSJT-10 meteor detections (these would have simultaneously been seen on Spectrum Lab on 3D chart):