RG142 coaxial cable performance at 1420MHz
Admin
RG142 is a high-performance coaxial cable that works very well at 1420 MHz (the neutral hydrogen line) for radio astronomy applications. Here’s the key info: Parameter RG142 Type Coaxial, silver-plated…
Radio Astronomy
BAA RA Section H-Line group meeting #4 hosted by Dr Andrew Thornett
https://m.youtube.com/watch?v=3dDvH_jVHms
Why M57 is a poor radio astronomy target for amateurs using H-Line radio telescopes
In short: no prominent absorption line in Messier 57 is known near the 21 cm hydrogen line (1420.4058 MHz). However, let’s break that down in detail — because what you’re really asking…
CPU and RAM Comparison for processing radio astronomy data
The Intel i5-8500 with 16GB RAM will be noticeably faster than the i5-6500 with 8GB RAM for processing radio astronomy data, but the actual performance gain depends on the nature…
To use GNU Radio for radio interferometry with an SDRplay RSPduo
April 2026: The following is my attempt to work out logic for achieving a successful interferometry experiment. I use this blog as my lab notes, so some of the entries…
To use RSPUno for interferometry
To use RSPUno for interferometry, you’ll need to understand both the hardware configuration and the software/data processing workflow. RSPUno is a system derived from the Radio-SkyPipe software but optimized for…
Why a C-band scalar ring cannot be used for 1420MHz Hydrogen line radio work
Using a conical C-band ring on a 1420 MHz (L-band) cantenna is generally not advisable because of the large frequency mismatch, but let’s break it down in detail: 📡 Key Concepts…
Planned observations of M81 and M82 using 20m Skynet dish at Greenbank Observatory (Jason and Andrew)
Planned observations of M81 and M82 using 20m Skynet dish at Greenbank Observatory. We have already done the green ones and are now extending our map further out. The squares…