I've found relatively strong carrier 12600 H from around 98e-99e sky position. Unfortunately, there is no lock for me.
A couple of month before there wasn't any interesting signal.
Any ideas, what satellite this is from? May it be the new ChinaSat 2E (98e), that was successfully launched a month ago?
https://www.flysat.com/launches2021.php
At least, I doubt that this is ChinaSat 11 (98e), there is no info about its transponders in upper band 12500-12750 MHz.
I've attached my spectrums of that far eastern part of the arc.
There are also weak signals in the range 12200-12750 MHz in Vertical pol from Asiasat-5 (100.5e) in Ku band.
The dish is offset Supral 120 cm.