If you are seeing Eb/N0 numbers drop (and then recover after) around the time when the sun is directly in the boresight of your receive antenna..
It’s probably caused by the Fall sun transit occurrence..
From: Thomas Cottle [mailto:Tom@Faithradio.us]
Sent: Thursday, October 04, 2018 12:37 PM
To: 'CRTech' <firstname.lastname@example.org>
Subject: [CRTech] how is everyone's ebno today?
Our Ebno has dropped to 8.79. Just checking to see if anyone else has experienced that. I do not see any wasps or bees in my cone. Wondering if something else might be the cause.
Faith Radio Network, WFRF