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Re: Help with cubesats

From: Nate Temple
Subject: Re: Help with cubesats
Date: Sun, 16 Feb 2020 12:32:07 -0800

Hi Andrew,

I would encourage you to try using GNU Radio first on your host machine in order to become familiar with it's operation. Then once you have an understanding of it, you can easily deploy your application/flowgraph to a headless device like a raspberry pi.

I'd suggest starting by going through the tutorials on the wiki https://wiki.gnuradio.org/index.php/Main_Page

From there, you can take an existing flowgraph and drop in a file sink to test it out.


Once you want to deploy it as a headless application, you can add in Parameter blocks to dynamically change the filename of the file sink, and switch your flowgraph from QT to "No GUI", and it can be ran from the command line.

Nate Temple

On Sun, Feb 16, 2020 at 12:02 PM Andrew Stamp <address@hidden> wrote:
Hi Nate,

Thank you for your reply. I was hoping to use this standalone, no screen. Is that possible? 

Can you explain a file sink for me please? It will do 9600 ax.25 GMSK? Sorry, still very new

Thank you,


On Sat, Feb 15, 2020 at 11:24 PM Nate Temple <address@hidden> wrote:
Hi Andy,

You'll probably want to use gr-satellites instead of direwolf. https://github.com/daniestevez/gr-satellites

You can record a pass using GNU Radio using a File Sink.

Nate Temple

On Sat, Feb 15, 2020 at 6:01 PM Andrew Stamp <address@hidden> wrote:

I’m looking for assistance with setting up a raspberry pi, with Direwolf and gr-satellites, to receive and decode from the Phoenix cubesats being deployed on February 17. Specifically, they will be ax.25, using GMSK. Is it possible to use a raspberry pi to record the audio, and record the waterfall? I was hoping to make this a stand-alone unit that I can upload the information when available. It is a raspberry pi 3 b, with an RTL-SDR dongle. I don’t have a screen on it. I am still very new, I have set up a couple raspberry pi’s with Direwolf, and have set up a Windows 7 netbook for RX WSPR. I would really appreciate any help. 

Thank you,

-Andy, N2YQO 

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