Heliocentric velocities M81 and M82 in different frames of reference
The heliocentric radial velocities of Messier 81 (M81) and Messier 82 (M82)—corrected for the motion of the Sun relative to these galaxies—are
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astronomy.network The Website of Lichfield Radio Observatory (LRO)
Andrew Thornett, Lichfield, England, M6THO, andrew (at) thornett (dot) net
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Installing GNU Radio & additional radio astronomy files
GNU Radio can be installed from: https://github.com/gnuradio There are different releases for different operating systems and the Windows version is
Read moreEffect of oxidation on electrical conductivity of copper tape used on antennae
Copper tape that has oxidized to form copper oxide is much less electrically conductive than pure metallic copper — in fact, copper(I)
Read moreTo open Command Prompt as Administrator in Windows
To open Command Prompt as Administrator in Windows, follow one of these methods: ✅ Method 1: From Start Menu (most common)
Read moreReducing noise in radio telescope systems
Original PowerPoint downloadable from link below. One thing I missed in it was to say that all monitor screens near
Read moreIntroduction to using NanoVNA
Original Powerpoint file by myself downloadable from link below. https://www.astronomy.me.uk/wp-content/uploads/2025/07/NanoVNA_Hydrogen_Line_Basics.pptx
Read moreMasers at 22GHz
At 22 GHz, the most prominent masers are water (H₂O) masers, specifically: 🔹 Water (H₂O) Maser at 22.23508 GHz 🔍 Astrophysical
Read moreChatGPT advice on how to build receiver and antenna for water masers
To build a 22 GHz water maser receiver, you’ll be targeting the 22.23508 GHz emission line, which is in the K-band of the
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