Could you contribute to the HamTV Merger?

S-Band DVB-S from the International Space Station
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G8GKQ
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Could you contribute to the HamTV Merger?

Post by G8GKQ » Tue Sep 30, 2025 10:27 am

The HamTV Merger is a network of amateur receiving stations that can upload received ISS HamTV Digital ATV data to a central server that builds a continuous video feed from the ISS.

The merger output is used to provide a longer-duration and more reliable video feed to accompany the school question and answer sessions. Clearly, the more receiving stations contributing, the better the video feed will be.

All that is required is a normal HamTV receiving system and one extra bit of software to send the data over the internet. The extra software is already built in to the Portsdown 4 receiving system, and a Windows version is also available.

If you are interested, please contact Ciaran at hamtvops@ariss-i.org.

The merger output is available at https://live.ariss.org/hamtv/

Dave, G8GKQ

OK2UUJ
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Joined: Mon Jul 20, 2020 5:13 pm

Re: Could you contribute to the HamTV Merger?

Post by OK2UUJ » Fri Oct 03, 2025 9:59 am

Hi Dave
I testing connection to the merger server with Portsdown4 system. But I do not find the configuration receiver parameters for Ham TV RX merger (menu 3).
I need set diferent IP port for test merger server, and set voltage for LNB (default is 0V) on Minitiouner v2.
In the standard RX section (Menu1) all this setings are present and functionaly.

73! DE OK2UUJ
Leo Hucin

G8GKQ
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Re: Could you contribute to the HamTV Merger?

Post by G8GKQ » Fri Oct 03, 2025 3:33 pm

Hi Leo

Thanks for the suggestions. I'm now working on both of these issues and hope to have an update for you soon.

Dave

G8GKQ
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Re: Could you contribute to the HamTV Merger?

Post by G8GKQ » Fri Oct 03, 2025 4:21 pm

Hi Leo

In advance of an update to the Portsdown software, you can set the correct port for the the Test server by editing the config file:

Code: Select all

/home/pi/rpidatv/scripts/merger_config.txt
and change the line

Code: Select all

testport=6789
to

Code: Select all

testport=9978
save the change and then go to the Merger menu and select "Region" "Test" (press the region button 4 times).

I've written the change for the LNB volts, I just need to integrate it into the update process, test it, and hopefully release it later this evening or tomorrow.

73

Dave

OK2UUJ
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Joined: Mon Jul 20, 2020 5:13 pm

Re: Could you contribute to the HamTV Merger?

Post by OK2UUJ » Fri Oct 03, 2025 6:02 pm

Hi Dave.

Many thanks. now I run test with Portsdown 4. On the test server present as ACTIVE and TS packets runnig :-)

Many thanks for your support.

73! DE OK2UUJ
Leo

G8GKQ
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Re: Could you contribute to the HamTV Merger?

Post by G8GKQ » Fri Oct 03, 2025 7:45 pm

Hi Leo

I have just published a Portsdown 4 update that adds the ability to select LNB volts in HamTV mode.

It also corrects the port for the test server if it has not been manually corrected.

Please let me know of any further feature requests or bugs.

73

Dave, G8GKQ

g8lce
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Re: Could you contribute to the HamTV Merger?

Post by g8lce » Sat Oct 04, 2025 9:49 am

Just thought I would add a thought / question.

I have been looking at setting up a TinyGS and will be setting it up soon. This is a network of 'ground stations' for receiving Lora APRS satellite transmissions. Could a similar system work for ISS? I am thinking of a simple system that only has a fixed aerial and only a limited area of reception.
I know your system is similar but could more simple setups be possible. A cheap and easy receive aerial etc. could be switched to when your Portsdown is not being used for other things and might just fill in a reception hole. It could be arranged so that your aerial could point at a position in the sky in arrangement with others to fill the sky!
So any simple designs? Tin cans, copper pipe or WiFi aerials? (filters and preamps too) And photos.

Martin G8LCE

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