Using GNU Radio for collecting HLine data

[Stephen Arbogast]

I am making progress   using   GNU Radio    to  collect  data for  processing   by    ezRA    So  far   some  results ........

1.ezRA  sky map

2. raw  data

Needs  more work....

Yes, I know..  increased  the  decimal  points  to  four   and  fast multiplying   by   3...  further  testing   is needed.

[Stephen Arbogast]

Using  AirSpy   with  SOAPY  no problems  on Linux Ubuntu

[Andrew Thornett]

How long is each sample integrated for? Worth trying going up to 3 to 4 minutes, if the software will allow you to do so. This was something Alex advised in past for 1m class scopes, and I have found it can help when lot of background interference.

Andy

Sent from Outlook for Android

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From: 'Stephen Arbogast' via Society of Amateur Radio Astronomers <sara...@googlegroups.com>
Sent: Monday, November 24, 2025 4:36:09 AM
To: Society of Amateur Radio Astronomers <sara...@googlegroups.com>
Subject: [SARA] Using GNU Radio for collecting HLine data

 

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[Stephen Arbogast]

I use   an  integration   time  of   60  seconds    with low  pass filtering.   As  Marcus Leech  has warned    we  must be careful  of  the   alpha  value   we use  in the   low  pass   filter ...   can  cause  errors.....

I still  have some  work  to do on my  flow  graph    but    this  is   a start...   I am  still  confident   that GNU  Radio   can handle  scheduling   and   threads   better than  straight  Python.  I am concentrating on  the  front  end 

data  collection and depending  on  Ted Clines  ezRA   for  post  processing.

Any  thoughts?

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