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Choices available for RF filters for amateur water maser radio astronomy (22 GHz).
The 22 GHz astrophysical maser is a water (H₂O) maser. The principal water maser transition is: This corresponds to the 6₁₆ → 5₂₃ rotational transition of water vapour. Water masers…
URLs for designs for cubesat analogue for teaching purposes
If you’re looking for educational CubeSat analogue/mock satellite designs that can be built and used on the ground, these are among the best open resources: For someone interested in building…
Latest working version of ezColGR – provides FFT 512 bins with Airspy Mini and saves data in ezRA text file format 10/7/2026
Click on link to download: https://www.astronomy.me.uk/wp-content/uploads/2026/07/LRO-H5-ezColGR-Flowgraph-100726.zip
GNU Radio QT GUI Vector Sink does it have maximum vector size?
No. The QT GUI Vector Sink does not have a fixed maximum vector size. Its Vector Size parameter simply has to match the length of the vectors presented at its…
Airspy mini are there limited FFT bin options as GNU Radio rejecting some I put in? So far, 256 and 512 works, but not 1024 nor 4096.
No. The Airspy Mini itself does not limit the FFT size to 256 or 512 bins. It simply streams IQ samples at supported sample rates (3, 6 or 10 MS/s),…
Handout from Chett Mitchell’s GNU Radio Flowgraph Layout Talk at BAA GNU Radio for Radio Astronomy Online Meeting 13/7/2026
Click on link below to download: https://www.astronomy.me.uk/wp-content/uploads/2026/07/Chett-Mitchell-GNU-Radio-Layout-handout-BAA-GNU-Radio-meeting-130726.pdf
Spectrum Lab software DL4YHF the software saves regular copies of top plot on main window but not plot on plot window. Why could that be?
This is by design in Spectrum Lab. The automatic capture command saves the main Spectrum Lab window (waterfall/spectrum display). It does not automatically save the separate Watch/Plot window. To save…
Has the TART radio telescope ever detected natural radio transients?
The Transient Array Radio Telescope (TART) installations throughout the world have detected radio transients, although this is not its primary purpose. The transients detected include bright flashes and other unknown…
SDR Sharp and IF Average Plug-in v2.7 (not latest versions)
https://www.astronomy.me.uk/wp-content/uploads/2026/07/SDR-IF_Ave-2-7.zip