I'm not familiar with the Oregon weather station, but I have a Davis station.
My station requires separate sensors for UV and Radiation. I've had my sensors for a little over a year now.
While UV and solar radiation move up about the same time, they are different measurements. So one sensor can't do both, unless they built it that way.
I've noticed on overcast days, my UV still went up even the the solar radiation didn't. And on some high solar radiation days, my UV may not be as high.
The solar radiation is measuring the amount of energy from the sun that is reaching the ground. Think of this number like a solar panel. The more watts per a square meter making it to the ground, the more energy the solar panel would make.
But UV is a specific spectrum range. Main reason for monitoring this measurement is to see how easily our skin will burn if unprotected.
So I'm guessing you'd need another sensor on your station to get both readings.
