What is Radio Meteor Scatter
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Radio meteor scatter is a radio propagation phenomenon where radio waves are reflected or scattered by the ionized trails left behind by meteors as they burn up in the upper…
October 2025
Head and trail echoes in radio meteor scatter
In meteor scatter, the head echo is the radar reflection from the plasma region immediately surrounding the meteoroid itself as it travels through the atmosphere — essentially, the “glowing ball”…
Dedicated software options for amateur ham radio meteor scatter
Here’s a breakdown of software options (and their pros/cons) for meteor-scatter / forward-scatter / meteor radio detection, along with which operating systems they support (or are known to run on).…
Moxon dimensions for radio scatter at BAA Radio Beacon and GRAVES
Here are practical, build-ready Moxon dimensions for the two bands. I’m using standard Moxon A-E notation (A = overall width; B = tip gap between element ends; C = feedpoint…
Common Ferrite Types (and Their Useful Ranges)
Common Ferrite Types (and Their Useful Range)Ferrite MaterialﾠTypical Trade NameﾠEffective Range (MHz)ﾠTypical Use#31ﾠFair-Rite mix 31ﾠ1 – 300 MHzﾠWideband RFI suppression (HF/VHF)#43ﾠFair-Rite mix 43ﾠ25 – 300 MHzﾠVHF suppression#61ﾠFair-Rite mix 61ﾠ200 –…
Very simple two module block GNU Radio GRC file to display input from SDRplay RSPduo receiver in single channel mode
Successfully detected Radio 2 with this today. https://www.astronomy.me.uk/wp-content/uploads/2025/10/Working-Simple-display-SDRplay-RSPduo-GRC-File-051025.zip
Instructions on how to install gr-radio-astro (contains set of GNU Radio modules required for DSPIRA GNU Radio Projects) & stand alone USB Flash Drive with preinstalled software & installing on a Raspberry PI
Releases: WVURAIL/gr-radio_astro gr-radio_astro This package provides GNUradio OOT modules and grc flowgraphs that fascilates Radio Astronomy Observations with software defined radio devices. There are two flavors of this projects: Installing…
Overriding maximum file upload limits in WordPress
There are WordPress plugins that let you raise or effectively remove file‐size limits (up to what your server / storage can handle). But a caveat: even with a plugin, you’ll…
Why mesh 5-10mm is fine for 21cm hydrogen line dishes
Example at the 21 cm Hydrogen Line For your 12-ft (3.65 m) dish, assuming ideal design efficiency η0=0.7\eta_0 = 0.7η0=0.7: RMS Surface Error (σ)ﾠσ / λﾠEfficiency (η/η₀)ﾠNet η 1 mmﾠ0.005ﾠ0.999ﾠ0.70…
External power from a low-noise amplifier (LNA) can potentially cause problems with an SDR (Software Defined Radio)
External power from a low-noise amplifier (LNA) can potentially cause problems with an SDR (Software Defined Radio), depending on how the power is supplied and whether the SDR’s RF input…