Radio observation in hydrogen line (1420MHz)

These 4D (3 dimensions in space + power) images have been created using latest ezRA software + Rinearn 3D software.

Below I followed Ted CLine’s new instruction set on how to generate 3D plots from ezRA data sets – 3D

Using following command line, from <CMD> in Windows, with one of latest versions ezCon, ezCon241021a.py, in ezRA suite of software,

This cavity filter from China has remarkably narrow band of only 2MHz either side of target frequency of 1420MHz (hydrogen).

Creating a 2,500-hour map of the Milky Way using hydrogen line (1420MHz) using Lichfield Radio Observatory’s LRO H1 radio telescope

Now formerly named (after competition in SARA and my astronomy groups): 2. Signal Snatcher – Ptarmigan 86cm Dipole Array LRO

This is the result of processing raw uncorrected data. ZIP file of EZB and NPZ files can be downloaded from

I have just taken delivery of a new hydrogen cavity filter from China. Click below to read cavity filter specifications.

Analysis of Ptarmigan Array data 10-15/10/2024, using Nooelec SAWBird H1 LNA only: Analysis of Ptarmigan Array data 15-16/10/2024, using Nooelec

we think this aerial is not effective because of poor solder connection. I used lead-free solder and this may have