Lichfield Radio Observatory, UK.
Azimuth 168 degrees.
Elevation 75 degrees.
I have tested various distances of the feed from the centre of the dish over several weeks and concluded that this is the best result.
Plots of data collected using Brian Coleman’s self-made hydrogen-line feed placed at correct (I think…but maybe not?) focal point on the LRO-H2 telescope (150cm Solar Cooker Radio Telescope) & pointed towards either outer Milky Way (1 spiral arm seen) or inner Milky Way (2 spiral arms seen) 16 May 2026
By Admin
Hi Andy,
Back of the napkin calculations put you at around 0.63 dB above background for the first and about 0.54 dB for the second. That’s about half what I would expect (and consistent with your earlier results). I would suggest the next thing to try is cover the inner surface with aluminum window screening and see if that helps. My guess is that the steel is a very lossy reflector at 21cm. One modification at a time, we’re going to optimize your system!
Cheers!