Block diagram of hydrogen line (1420 MHz) radio telescope
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I prepared this diagram of 1420 MHz telescope. Andy
Radio observation in hydrogen line (1420MHz)
Advice on how to build and test the feed for LRO-H2(SCRT)from SARA Member, Don Latham AJ7LL, on SARA RTOP 2/2/2025, with extra information added from other members:
There have been many expert and knowledgeable comments about cantenna feed design on this group and on the SARA RTOP yesterday by people who truly understand the subject – we…
Cantenna Design 1420 MHz
Website recommended by Alex Pettit: https://www.changpuak.ch/electronics/cantenna.php
How to design an effective 1420 MHz waveguide from ChatGPT
To design an effective waveguide for 1420 MHz (21 cm hydrogen line), you need to consider several factors, including waveguide dimensions, material, and feed design. Here’s a step-by-step guide to…
Processing LRO-H2(SCRT) Data collected over two days 27-28 January 2025 by ezCol in ezRA software suite, using 1400-1427MHz Cavity Filter, Nooelec SAWBird H1 LNA, KMR 400 coaxial cable, and RTL-Blog V3 Software Defined Radio; reference frequency 1422 MHz, Bandwidth 1.000, Integration of 1,100,000 samples. Processing on 30/1/2025.
Click on links below to download data: ezCol .txt data files https://www.astronomy.me.uk/wp-content/uploads/2025/01/data-300125.zip SDR Sharp data generated from conversion of above data files https://www.astronomy.me.uk/wp-content/uploads/2025/01/LRO-H2SCRT_Integ1100000_250128.zip Results of processing data in ezCon scipt…
3D processing 3 days ezCol data using latest ezCon250124b.py script in ezRA suite & using meshes/matrix data tables in Rinearn 3D 27/1/2025
This shows the repeated patterns of data emerging from the drift scans of LRO-H1(Ptarmigan) hydrogen line radio telescope at LRO & the generation of contour maps using Rinearn3D. The use…
LRO-H3 1420MHz tuned aerial (Alex Pettit Plate Yagi) not showing difference between sky and ground. Why might this be? Handmade tuned 1420MHz with 13 elements and RTL-SDR Blog V3 software defined radio and Nooelec SAWBird H1 low noise amplifier and filter.
LRO-H3 1420MHz tuned aerial (Alex Pettit Plate Yagi) not showing difference between sky and ground. Why might this be? Handmade tuned 1420MHz with 13 elements and RTL-SDR Blog V3 software…
Batch file used for collecting data using ezCol (Easy Radio Astronomy) in hydrogen line (1420.405MHz) radio telescopes at Lichfield Radio Observatory (LRO).
This is the current batch file used with LRO-H1: REM NORMAL RESOLUTION (IE STANDARD SETTINGS) cd C:\cd C:\Data\ezRA_Program+Data\LRO\py ..\ezRA\ezCol.py -ezRAObsLat 52.7 -ezRAObsLon -1.8 -ezRAObsAmsl 81.0 -ezRAObsName LRO-H1(Ptarmigan)ezCol_1400-27MCav+SAWB_LMR400_FreqRef_1422-405_Bandwidth_1-000_El-40-1_Az_163 -ezColAzimuth 163 -ezColElevation…
Comparing specifications of range of software defined radios that can be used for hydrogen line Amateur Radio Astronomy with small dishes.
Detecting the hydrogen line at 1420.4058 MHz is a popular project among amateur radio astronomers, and several software-defined radios (SDRs) are suitable for this purpose when paired with appropriate antennas…
Smallest antenna that can detect hydrogen in Milky Way
Detecting the 21 cm hydrogen line (the characteristic emission from neutral hydrogen in the Milky Way) requires a radio antenna sensitive to that wavelength. The wavelength of this emission is…