Weather radar is surely all ground based radar, not satellite?
However most windy.com data is going to be large satellite derived.
With Windy, which is the correct/ best feed to us ICON 7km or ECMWF 9kw etc, they all show different, cloud coverage seem totally different in particular.
I would prefer having a look at sat24 just like i’m looking at metar because it’s an observation, and not as estimation based on a particular model. I like windy very much, but still it’s a forecast.
If like me, last week and at the weekend, you were looking at the forecasts for flying this week, the coming weekend or early next week, it was interesting to note that the GFS and ECWF models were completely different across much of Europe. Completely different ideas as to where the low would go or the fronts would be.
There is a mix of discussion between radar images and weather generally. I merged two threads yesterday when they were both regarding radar 
ICON is useless IME. Don’t know why it should be useless, because it is very short-range…
ECMWF is better than GFS and I find it broadly similar to the UKMO MSLP charts in terms of depicted wx and timing of the movement.
