This image was created with the relatively new "Celestron Sky Portal"
(Apple App Store and free of charge)
Cygnus-A being a radio source
cannot be seen by naked-eye and is only
detectable with a special receiver.
Also, Cygnus-A is far and away beyond the star annotated above as Eta
My chart-recording proving the
presence of Cygnus-A
Graph of received energy as Cygnus-A peeped sequentially between
virtual railngs cast onto the sky by my
Radio frequency was 173.2 MHz Wavelength was 173.2
( The product of these two constants is equal to
My interferometer and chart-recorder were set to run
from July-07-2200z until July-08-0400z (6 hours total)
the 'channel' was quite free of the usual
interference such as
heard from the body-mikes of
artistes in theatres; pubs and clubs / car ignition systems;
and other unidentified appliances.
As a radio-amateur I am aware that regulation of the radio spectrum
is the responsibilty of Ofcom.org.uk and given that Jodrell Bank
10 miles from here perhaps the air-waves are kept squeaky-clean !
My inspiration and prep for this experiment occurred in lumps from 1974
I believe that my diligence was well rewarded.
here for an equipment over-view.
Many thanks for
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2020 Geoffrey Royle - G4FAS