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Circular Polarisation is used to ensure that if the reflecting target has any polarising properties as a wire or cylinder with a diameter small compared to the illuminating wavelength would, that some

Why is th tx antenna CP? Have you considered a GPV? ?It may help reducing direct wave if horizontal polarised Rex antennas are used.

yes it's difficult thinking about what the polarisation is the meteoroid ?and then how this is seen at the receiver. ?One needs to consider azimuth and elevation angles Are these the azimuthal

Hello Mike The X and Y plots look similar but I would not claim that we are able to make any precise measurements of polarisation, just a strong indication. Another problem is that it is very

Hello Mike A good question !? The Moxon rectangle calculator has the facility to calculate the main lobes but I've forgotten how to work it ! I need to re visit it. see

Do the NW Hampshire H and V polarisation antennas have the same radiation patterns?

This screenshot shows? the outputs from 4 of the receivers in our network as waterfall displays which can be viewed live at https://ukmeteorbeacon.org/beaconclient/ This example shows an echo seen

There is an interest article here https://www.emeteornews.net/wp-content/uploads/2024/03/eMetN_2024_2.pdf on AI and meteor type recognition by Wilhelm Sicking who has written several articles on the

I just discovered that 'Hackaday' has featured a 'Tech Minds' video on receiving the meteor beacon at Buxton. https://hackaday.com/2023/06/18/detecting-meteors-with-sdr/ Tony

Hello Roo That sounds like a great idea. I've attached? the last four screenshots that I have grabbed. They are fairly representative, with some "typical" echoes, some aircraft and direct signals

Brian Some time ago I proposed we should take a look at some AI based meteor identification. As you are now able to start collecting images containing meteor strikes, which can be verified, it would

Now with the GB3MBA meteor beacon back ON how about making some observations ? Few people have time to look at a screen for long and I certainly don't.? The way I make observations is by using a

Hello, ??? ??? There is a VLF station guide at www.vlf.it/trond2/callsign.html but it is still dated in 2000, so probably not very reliable now. It does list a signal at 22.8kHz from Holt, N.W

Hello everyone. I am based in Australia, and I am aware of the Exmouth VLF Transmitter. Is anyone aware of any other VLF transmitters in or near Australia. Thanks Nick Dr Nick Tate Haroldton 80

Started 20 minutes into the France - England match so I spent the evening switching between that and https://www.youtube.com/watch?v=YBpXrBLnKzc Shawn Willsey is a geology Prof in Idaho - great

Hi all, The Grindavik VLF transmitter on 37.5kHz switched off again this evening a few minutes after a new volcanic eruption started at 20:23. It looks as though it's in the same place as in Feb away

Thanks for the update Brian Best wishes Mike G

Thanks to a great team effort the Meteor beacon is back ON See https://ukmeteorbeacon.org/Bstatus and the Live streams from the receiver network at https://ukmeteorbeacon.org/beaconclient/ . Special

Im interested too Norman

Yes please Paul Thanks Mike