Angular size of the Great Orion Nebula (M42)
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Do you mean the angular size of the Great Orion Nebula (M42)?
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SDRplay RSPduo and bias tee
Yes — the RSPduo does include a bias-tee on its Tuner 2 SMA port. (SDRplay) Here are some details and caveats:
Sampling / time resolution (“sample time”) and timing behaviour of the CosmicWatch muon detector.
Here’s what I found on the sampling / time resolution (“sample time”) and timing behaviour of the CosmicWatch muon detector: Key timing / sampling facts Summary & caveats So, in…
How does the flat sides of a corner reflector effectively channel the radio signal onto the waveguide?
That’s a neat question — it sounds a bit counter-intuitive at first! https://www.astronomy.me.uk/wp-content/uploads/2025/10/1000036614-161025.png Here’s why a corner reflector antenna doesn’t just bounce the hydrogen-line radio waves back out into space,…
Dimensions of horn antenna for hydrogen line radio astronomy
Yes — the dimensions of a horn antenna really matter for hydrogen line (1420 MHz, λ ≈ 21 cm) observing. The horn’s shape sets its gain, beamwidth, and impedance match,…
Easy Radio Astronomy Software (ezRA)
LRO-H2 Radio Telescope (150cm Solar Cooker Dish)
SDRplay RSPduo Software-Defined Radio (SDR)
GNU Radio Companion GRC file used for test of alternative to ezCol with SDRplay RSPduo for data collection for later analysis by ezRA on LRO-H2 radio telescope 16/10/2025
I am just about to use the following file on the Solar Cooker Radio Telescope (LRO-H2) as part of a test of a system to collect data in ezCol .txt…
Draft process for getting URSP B210 Software-Defined Radio to work on Windows version of GNU Radio.
This is a draft document, and I cannot confirm it works – you also use it at your own risk! No indemnity provided. NB If it does not work for…
With the non-calibrated Spectrum Y scales of ezRA / GNU radio,, how can hardware performance be compared and changes evaluated ?
That is the plus for the SDR Sharp > IF Average Plug-in for SDR Sharp > H-Line 3D software sequence, because even if you don’t have an absolute power scale,…
Using USRP B210 SDR with GNU Radio Win10 revised 14/10/2025
Collated document I have put together, which I think might tell people how to do this……no promises! I got it working once, but twice might be too much to ask!!…
First output from SDRplay RSPduo GNU Radio based on modified DSPIRA GRC using small handheld Moxon aerial on aerial input 1 of 2 — 15/10/2025
This will not be Milky Way as inside and Doppler shift on the 1420 MHz line too big – about 190 km/s (calculated from the difference in frequency on plot…