**Think**
There's a data set, in the base.
There's a data set, in the rover.
The base to rover processing via rtk, is the same data set used via ppk. The METHOD is not the same. But, the data set IS THE SAME.
Thus, it's possible/likely that if rtk is bad, then so is ppk.
Now, change the data set, and we're on to a genuine check. Without that, you **REALLY** don't have independent verification.
It's only maybe a 10% (or so) independent verification. Because ppk handles the data somewhat differently.
Nate