Using the Dwingeloo WebSDR for GRAVES Meteor Scatter

If you are thinking of setting up a meteor scatter receiver using the GRAVES radar, did you know you can use thc Dwingeloo WebSDR in The Netherlands?

Visit http://websdr.camras.nl:8901/ and then select the GRAVES option!

Es'Hail QO 100 WebSDR for the Raspberry Pi

Not bad for a morning's work, setting up a WebSDR for the Es'Hail QO-100 transponder on a Raspberry Pi 3.  Just need a dish, LNB and bias tee.

The software can be downloaded from https://github.com/dj0abr/QO-100_SSB-WebSDR_DATV-WebSpectrum following the YouTube video from DJ0ABR https://www.youtube.com/watch?v=nyf5-YOdivU

Perseids Metoer Observations

Presentation to Blackburn Leisure Astronomy Society (BLAS) about the Radar Observations of the Perseids Meteor Shower made on the 12th August using the French GRAVES (Grand Réseau Adapté à la Veille Spatiale) Radar. We set off looking for meteors but ended up capturing lunar echoes on the Waterfall display !

BBC Radio Humberside Interview for Perseids Meteor Shower

Caroline Brocklebank from BBC Radio Humberside visited the Blackburn Leisure Astronomy Society to find out about how to observe the Perseids meteor shower with your eyes and our plans to use an amateur radio receiver and Yagi antenna to detect reflections from the French GRAVES (Grand Réseau Adapté à la Veille Spatiale) space surveillance radar.

How Britain Won the Space Race

Look out for the “Timeshift” documentary on BBC iPlayer that charts how Sir Bernard Lovell’s radio telescope was used by both the Americans and Russians during the Space Race.



The programme starts with the experiments using wartime surplus radar equipment to detect the reflections from the ionised trail that is formed as meteors penetrate the Earth’s upper atmosphere.  The radio observations were correlated against the visual observations made by volunteers lying on their backs in the open field.  From here, things became larger with a fixed dish made up from wire catenaries supported wartime surplus Army antenna masts, with what can only be described as a garden shed on stilts containing the receiving antennae at the focus – I’m not going to paraphrase the whole programme, but the 250ft diameter dish that was built was used to chart the early launches during the cold war when both sides were eager to demonstrate their ability to launch Intercontinental Ballistic Missiles, with everything coming to a head during the Cuban Missile Crisis as one of the first Ballistic Missile Early Warning Systems (BMEWS) to be used by the British in the cold war.

The first part of exploring radio astronomy will probably follow the route of detecting the signals reflected by meteors, making use of the GRAVES radar in France – GRAVES is short for the Grand Réseau Adapté à la Veille Spatiale, which translates to Large Network Adapted to Space Watch.  What makes this radar ideal for amateur observations is that it transmits a continuous beam of signals from one site, whilst simultaneously receiving signals from a second geographically separated site elsewhere in France. Secondly, it transmits with sufficient power that it is possible to detect its reflections from the surface of the moon, and finally, it transmits on 143.050MHz, which lies just below the popular 2-metre amateur radio band, and hence I already have most of the equipment needed already to get started, so watch this space...

Repeat of WSPR Experiment from Barmby Tidal Barrier

To provide a comparison with the previous experiment, the WSPRLite was again setup from the Goole Radio and Electronics Society's portable location at Barmby Tidal Barrier.  Apart from changing the callsign back to G0VRM, the setup was identical.  This time, there was some grayline DX to the Canaries at approximately 8PM, otherwise the results were virtually identical.

WSPR from a Diamond HF-30HX Mobile Whip

Whilst on holiday in Trawsgoed, near Aberystwyth, Wales I setup my WSPRLite using a Diamond HF-30FX 10 MHz mobile whip.  The WSPRLite was configured using the WSPRLite Explorer App using Samsung Galaxy S7, setting the callsign and locations from the phone's GPS, and was left powered from the phone and left running overnight in the car.

Whilst the phone's battery was completely discharged in the morning, the transmitter worked from 8PM until approximately 4AM, and despite the "compromise antenna", contacts into most of Europe were logged.