XPost: rec.radio.amateur.moderated
EI7GL....A diary of amateur radio activity
///////////////////////////////////////////
Winter 2021 release of the QRSS Compendium 4th Edition
Posted: 18 Dec 2021 04:21 AM PST
https://ei7gl.blogspot.com/2021/12/winter-2021-release-of-qrss-compendium.html
Every year, the Knights QRSS Group release their annual compendium. You can view the Winter 2021 (4th edition) HERE
The Knights QRSS Group promotes the use of very slow mode code beacons to
carry out propagation experiments on the HF bands. Often signals that are
15 to 20 dB below the noise can be seen on a computer screen as opposed to being heard by ear.
While newer digital modes can now be used for detecting very weak signals,
they don't really show propagation effects. Either the digital signal was decoded or it wasn't. QRSS signals like the one shown below shows
propagation over a 15-minute period.
In that image, you can see how signals fade with the Sporadic-E footprint moving and the polarisation changing. It also shows up slight doppler
effects.
You can find out more about QRSS signals by visiting the QRSS Knights
Groups.io page...
https://groups.io/g/qrssknights/topics
--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)