Linux pyrtlsdr no longer available – what can be used instead during installation of ezRA?
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I collect data with free Linux PCs. I find my Windows 10 PC is running Python 3.9.4, which does not show a problem. I see available Win11 Python version 3.12…
Software
Maths Ted uses to calculate galactic velocity in ezRA
Maybe your answer is explained at about https://www.youtube.com/watch?v=YXuPDJVRbd0&t=1892sor maybe starting back at https://www.youtube.com/watch?v=YXuPDJVRbd0&t=1083swhere I explain the tangential velocity method.The radius from the Galactic Center to the tangential gas cloud is…
Where did name Soapy come from in Soapy drivers, such as available in GNU Radio?
The name “Soapy” in SoapySDR (and the associated Soapy drivers) comes from the idea of making SDR hardware support clean and simple — as in “soap makes things clean.” SoapySDR…
How to restore a Veeam server-led Linux backup (Agent managed by Backup & Replication) as a bare-metal / full image restore
To restore a Veeam server-led Linux backup (Agent managed by Backup & Replication) as a bare-metal / full image restore, you must use Veeam Recovery Media — not just file-level…
ezPlotly software to create 3D rotatable webpage plot from ezRA data
Download ezPlotly files here: https://www.astronomy.me.uk/wp-content/uploads/2026/02/ezPlotly260214b.zip Hi Andy, Maybe try this. I attach 2 new programs, ezCon260214a.py ezPlotly260214b.py Very rough hacks but fun. Run something like, py ..\ezRA\ezCon260214a.py data -ezCon087Csv 4…
How does an FIR filter work in GNU Radio
An FIR filter (Finite Impulse Response filter) in GNU Radio works by applying a weighted sum of a finite number of input samples to produce each output sample. Let’s break…
How could I create the equivalent of the FM demodulator block in GNU Radio, if the block did not exist?
FM demodulation looks mysterious in GNU Radio because it’s one tidy block… but under the hood it’s actually very simple. FM is just information encoded as changes in instantaneous frequency.…
Flowchart and figures from Communication systems with GNU Radio book
https://gitlab.com/gnuradio_book/flowcharts
In GNU Radio there is an AM demod block. If this wasn’t there what processes would be required to achieve same function?
AM demod looks simple on the surface, but under the hood it’s doing a couple of neat little tricks. If the built-in AM demod block vanished overnight, you’d rebuild it…
When writing an GNU Radio flowgraph for AM radio why must radio signal Input be multiple by fixed signal source before filtering?
Ahhh yes, welcome to the “why are we multiplying things?” club 😄 — this is actually the heart of how a radio works. Short answer:You multiply the incoming RF signal…