BATC Forum

I've got this far, but now I need to ask for someone to tell me the correct way to access the Goonhilly FFT stream.
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I'm hoping to add it into this client/server system I'm working on. Thank you.
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Hi Michael,
Is this what you are looking for?
https://eshail.batc.org.uk/wb/

As if you are after connecting to the Goonhilly stream direct I dont think that option is available.
Probably due to internet bandwidth restrictions.
I'm sure Dave or Noel will verify this.
Hope that helps Michael
73 Mark

G0NMY wrote: ↑

Thu Aug 26, 2021 11:04 pm

Hi Michael,
Is this what you are looking for?

After only 76 views from other members, congratulations on being the first to respond. But no, that is not what I'm looking for. I'm after the raw fft stream that goes to LiveTune and those 2 French guys who don't open source their code. So it is possible and it would only increase the data flow by one user - as with any other use who accesses the web page. Searching through the GitHub undocumented source code is futile. Believe me, I've tried.

Hello,

I don't know programming, but maybe there is some information here:

https://github.com/F5OEO/datvplutofrm/b ... /lib/wf.js

Stephane

Worth taking a look at Rob M0DTS quick tune github https://github.com/m0dts/QO-100-WB-Live-Tune

If not, I'm sure Rob or M0DNY will be able to help.

73

Noel

F4DVK wrote: ↑

Fri Aug 27, 2021 4:40 am

I don't know programming, but maybe there is some information here:
Stephane

Thank you Stephan. It's difficult to see what's going on, but it should help.

g8gtz wrote: ↑

Fri Aug 27, 2021 8:22 am

Worth taking a look at Rob M0DTS quick tune github https://github.com/m0dts/QO-100-WB-Live-Tune
Noel

I sent an email to Rob M0DTS a few days ago. Perhaps he's on holiday.
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Thus far, I know I get a continuous stream from wss://eshail.batc.org.uk/wb/fft, but I've yet to discover how its packed. A couple of sentences that explain what's going on would be extremely helpful. Anybody?

Hi Michael,

After only 76 views from other members, congratulations on being the first to respond. But no, that is not what I'm looking for. I'm after the raw fft stream that goes to LiveTune and those 2 French guys who don't open source their code. So it is possible and it would only increase the data flow by one user - as with any other use who accesses the web page. Searching through the GitHub undocumented source code is futile. Believe me, I've tried.

Why not just put your own dish and lnb up then you could capture it all and stream it how you like, and with a lot less internet lag.
Then you can be a Spanish guy who doesnt open source his code!
73 Mark

G0NMY wrote: ↑

Fri Aug 27, 2021 10:02 am

Why not just put your own dish and lnb up then you could capture it all and stream it how you like, and with a lot less internet lag.
73 Mark

When I'm happy my software is ready, I'll splash out the dosh and buy a dish and all the other stuff. I'm aware it might be possible to source the spectrum data directly from the Pluto, so (in theory) all I'll need to do is change an IP address.

G0NMY wrote: ↑

Fri Aug 27, 2021 10:02 am

Then you can be a Spanish guy who doesnt open source his code!
73 Mark

I'm not Spanish. Check out my website https://michaelnaylor.es. There's a link to my GitHub page where the source code will be published. At present, you'll only see the README file, because the code has memory leaks that are proving difficult to solve.

I know youre not Spanish Michael, I was pulling yourleg

I don't know the exact specification of the spectrum stream, but from observation:

Each scan sends a block of 1844 bytes
This is 922 16-bit samples in low-high format
The last two 16-bit samples are zero
Sample zero is at 10490.500MHz
Each sample represents 10000 / 1024 = 9.765625kHz
Sample 919 is at 10499.475MHz
The noise floor value is around 10000
The peak of the beacon is around 40000

Brian