A kind anonymous follower gave me data from their own receiver for Dec 8 to Jan 3.
Coverage is still limited but a completely different source. 57'593 observations was included.
This heatmap shows where flights have been recorded and how intense the concentration has been. Only flights with NIC 1-6 are used (representing bad position accuracy, ie jammed)
From this data I identified only hours where the jammer was active (high amount of bad positions). I discarded all hours with low count.
From mean, median and histogram I picked 281 as cutoff for high activity. This excluded 150'523 observations, interpreted as expected errors.
They turned it on. Very curious as to why it is so often nights and so regular.
* It is unusual to not see daily sanctioned tanker arrive to Baltic Sea, usually a few each day.
But, the last 4 days lull ismight be explained by weather: Atlantic storms, low temperature and an increasingly frozen Gulf of Finland.
The ice is growing thicc around Russia's Baltic oil terminals.
Ice data outlets list a bunch of ice-breakers in service, but other sources have stated Russia lack capacity to keep the ice-sensitive rust-bucket tankers in play.
ASTROL 1 is a largely flat cargo ship with hatches that likely would serve well as drone pads.
She is a similar model to SCANLARK, recently apprehended by German authorities on drone suspicions and to PORT OLYA 4, drone import ship on Iran trade. Sunk by Ukraine.