May 31st, 2020
I have been curious about everything about the hydrogen line for quite a while. So at least I mounted a feed for 1.4 GHz in my 3 m dish, installed a LNA at the feed, as well as a Pluto SDR and SDR# with the IF-Average plugin. First steps are very promising, as I saw something, when beaming to Cassiopeia and Swan.
![](http://www.dj5ar.de/wp-content/uploads/2020/05/2020-05-31-23_18_21-2020-05-31-08_06_11-IF-Average-Window-Kassiopeia-marked.png)
![](http://www.dj5ar.de/wp-content/uploads/2020/05/2020-05-31-23_21_28-2020-05-31-08_06_11-IF-Average-Window-Schwan-marked.png)
Due to the doppler shifted signals the lines are smeared (red marks). The spikes seen, are just interferences.