@boldblue737 Doing a quick look, I only see solar radiation data being reported from CWOP stations, not National or PWSWeather.
Even though I can see the data in our queries, I can't find it officially reported.
These stations are sending solar radiation data but I can't find it on the websites.
So it seems like CWOP is the way to go if you want to report that data.
If not, I wouldn't sweat it, we can interpolate it when not present, which is the huge majority of the time.