Nooelec SAWBird LNA checked on NanoVNA with 40dB attenuation at LRO 6/3/2025
As 40dB attenuation in the circuit, then need to add 40dB to reading on VNA. Once this is done, it
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astronomy.network The Website of Lichfield Radio Observatory (LRO)
Andrew Thornett, Lichfield, England, M6THO, andrew (at) thornett (dot) net
Radio Astronomy
NanoVNA Analysis LRO-H2(SCRT) 270225
Download Powerpoint Presentation on this analysis and problems found in system and solutions: https://www.astronomy.me.uk/wp-content/uploads/2025/03/NanoVNA-Analysis-LRO-H2SCRT-270225.pptx Download timelapse of data collection using
Read moreProcessing data from LRO-H1 (Ptarmigan Array) Hydrogen Line (1420.405MHz) Radio Telescope using bandwidth 2.4MHz and reference frequency 1417.405MHz for 24 hours 25-26 February 2025
Click below for data file 1 of 2: https://www.astronomy.me.uk/wp-content/uploads/2025/02/LRO-H1Ptarmigan_ezCol_1400-27MCavSAWB_FreqRef1417-405_Integ280000_BndWdth2-4_250225_20.txt Click below for data file 2 of 2: https://www.astronomy.me.uk/wp-content/uploads/2025/02/LRO-H1Ptarmigan_ezCol_1400-27MCavSAWB_FreqRef1417-405_Integ280000_BndWdth2-4_250226_00.txt
Read moreUnited Kingdom (UK) Military Radio Bands III, IV and V
In the UK, Military Band III typically covers the frequency range of 225 MHz to 400 MHz. This band is primarily
Read moreOnline calculator for determining radial velocities relative to local standard of rest
The following link goes to such a calculator (this link works as of 23 February 2025): https://www.gb.nrao.edu/GBT/setups/radvelcalc.html Further discussion on
Read moreHow electrically conductive is aluminium and zinc spray paint
I asked this question to ChatGPT today, which gave following answer: Aluminium and zinc spray paints contain fine metal particles
Read morePlotting 3D images with Rinearn3D using Ted Cline’s new ezGal250218e.py script 19/2/2025 to generate Rinearn3D mesh CSV data file from all viable ezRA NPZ and EZB data files 060124-011124
The ezGal510 plot needs a lot of data to fill, so it is hard to avoid data gaps. The plots
Read moreGround Waves and Sky Waves in Sudden Ionospheric Disturbances (SIDs)
From John at SARA Feb 2025: Hello, The signals that we receive consist of a ground wave and
Read moreFirst attempt at plotting 3D images using Rinearn3D using Ted Cline’s new ezGal250218e.py script 19/2/2025
The ezGal510 plot needs a lot of data to fill, so it is hard to avoid data gaps. The purpose
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