I think it is great that you are looking at this and trying to come up with a rational explanation for the discrepancies between satellite data and ground based data. However the much simpler and more likely explanation is that much of the data from ground based stations suffers from inaccuracies due to poor site design, placement of instruments and just plain bad locations.
We have “professionals” with a vested interest in promoting anthropogenic global warming collecting and releasing much of this data. It is surprising to me that we have any reliable data coming from these types of sources. Their data becomes even more questionable when they refuse to release the raw numbers. Fortunately there are still some uncorrupted persons working for some agencies who do provide good raw data. I sincerely hope that in the current political climate that these brave souls are able to hold onto their positions.
Just the absence of sunspots.
Just the absence of sunspots.