North America never had the same restrictions in air traffic that Europe did - I kept a check on the top one thousand receivers in the global rankings and for quite a while there were less than a handful who were outside the US. I think that speaks volumes.
I made a quick comparison of my receiver 2019 vs. 2020 on a weekly basis.
Shown is the average value for the corresponding calendar week.
Comparison of the last century? LOL!
Yeah, those dates in the chart can’t be right. The Raspberry Pi-Eniac didn’t even function for another 25 years after that. Mounting it on top of the tower was much harder then…
Guys, please… Did you never make a mistake?
Those graphs tell quite the epic story. Here we go again…
Same here near Frankfurt. The impact of Frankfurt is not that much, it’s more the high altitude aircraft on their routes.