From SARA meeting 19/10/2025: Eduard Mol: Just found Joachim Köppens planet observations at 10 GHz, I believe he used a 7.2 metre dish: http://sat-bodenstation-roenne.uni-kiel.de/. Jupiter was only 0.015 dB! Saturn…
Compare RSP1 RSP2 RSPDuo HackRF PlutoSDR USRP. Here’s a practical, spec-level compare of the popular SDRs you named, with notes for radio astronomy / interferometry use. Device RX freq. range…
Generally, the bigger the better within practical limits. Consider its orientation (N-S or E-W), where it will be located, will it be moved, will the mount support the weight of…
Building a horn antenna tuned for the 21 cm (1420.405 MHz) hydrogen line is a popular and effective way to do amateur radio astronomy. A horn antenna is especially good…
I asked ChatGPT how to do this, and here is its suggestion:
WR-650 already covers 1.12–1.70 GHz, so 1.420 GHz sits comfortably in-band—you don’t need to resize the guide. What you do need is a simple, well-tuned coax-to-waveguide probe with a backshort…
The WR14 waveguide (also known as WH14) is a rectangular waveguide used for millimeter-wave applications in the K-band. Here are the key technical specifications: Parameter Value Designation WR14 (WH14) Frequency…
The WR137 waveguide is a rectangular waveguide commonly used in the C-band frequency range, particularly for radar, satellite communications, and radio astronomy work just below the hydrogen line. Here are…
The WR-90 waveguide is a rectangular waveguide commonly used for microwave signals, particularly in the X-band frequency range. Here’s a quick technical summary: Parameter Value Waveguide size (inside) 0.900 in…
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…
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