Radio observation in hydrogen line (1420MHz)
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Analysing spare Nooelec SAWBird H1 LNAs at LRO 6 March 2025 using NanoVNA (Vector Network Analyser)
I used a NanoVNA vector network analyser to analyse my spare Nooelec SAWBIrd H1 low noise amplifiers. In each case, the level is around 0dB – so, when 40dB attenuation…
Procedure for using NanoVNA to test Nooelec SAWBird H1 LNA
Hi Andy, Sorry I’ve been driving all day so just seen this. I hope I’m not teaching you to suck eggs, but it seems from some of the posts that…
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 is clear that the SAWBird produces roughly 40dB of amplification…
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 ezCol (ezRA):
Processing 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
United 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 used for military aviation, tactical communications, and secure data…
Online 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 this subject can be found here (23 February 2025): https://astronomy.stackexchange.com/questions/41196/looking-for-a-routine-to-correct-for-local-standard-of-rest-lsr
How 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 suspended in a binder, but their electrical conductivity is significantly…
Plotting 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 below are based on a substantial data set collected using…