Well I have to disagree
This is an image from the radar of the F18 in DCS
You can see grainy things of course but you can see the shilouette of the carrier, vehicles without problems on the airstrip and also the electrical towers alongside the river.
In this one, from the viggen you would only see a dot for the carrier, even you will have problems to see big vehicles in this plainn area, this is Anapa
I don´t know the % of grain it should have but I can clearly seen how the advances in radar can be with this both images.
Also, as you can see, the important thing here is the resolution, in the Viggen,s radar the ground is like a piece of fur :D
EDIT: And also here, you can clearly see that resolution is worse in all aspects but you can manage to see what is a river, and wher are the forest areas