From the Southgate Amateur Radio News website...
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144-146 MHz WebSDR at Goonhilly now available
AMSAT-UK and BATC have announced the availability of a new 144-146 MHz Web-based Software Defined Radio installation at Goonhilly
This is being provided in collaboration with Goonhilly Earth Station where it is kindly hosted alongside the existing receiving equipment for the amateur radio transponders on the Qatar-Oscar-100 (QO-100 / Es’hail-2) geostationary satellite.
It shares the same Turnstile antenna that is used for the reception of the AO73, EO88 & JO97 CubeSats.
Being located in the far South West of the UK, it is anticipated the SDR will be useful for early Acquisition of Signal (AOS) of 144 MHz downlinks from amateur satellites and the International Space Station (ISS). Additionally it can be used for reception of tropospheric signals from the south – the Spanish beacon ED1ZAG on 144.403 MHz has been already been heard on the system.
The new 144 MHz band WebSDR is available at https://vhf-goonhilly.batc.org.uk/
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Even though the turnstile antenna is omni-directional with no gain, it's the location of this webSDR that makes it interesting. Here are just a few uses...
1) RSGB News service... I used it to listen to the weekly GB2RS news on the local GB3NC repeater on 145.725 MHz.
2) Sea Path... What's unique about this site is that it is effectively on a peninsula and has the sea on three sides. This allows more distant signals to be heard rather then say a WebSDR located in the middle of England.
During a quick scan, I could heard French SSB stations as well as repeaters which were at least 200kms distant.
3) Propagation Test... Anyone with a modest Yagi antenna and say 50 watts on 144 MHz may well expect to be heard up to 500 kms away under modest conditions. The map below shows a 500 km circle around Goonhilly.
Just make a transmission and see if you can hear yourself. It will allow you to check conditions as well as any antenna improvements to your station.
It can also be done of course on FM although the range would be much less.
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| 500 km circle around Goonhilly |
