ARE WE THERE? In a multi-GNSS world, that is. We’ve asked that question from time to time in this column over the years. So, are we there yet? That depends. One definition of “multi” is more than one.

PPP. It’s one of the many acronyms (or initialisms, if you prefer) associated with the uses of global navigation satellite systems. It stands for precise point positioning. But what is that? Isn’t all ...

The proposed method achieved horizontal positioning errors within 3 m and 5 m for 76.7% and 93.1% of epochs, respectively—substantially outperforming advanced GNSS multi-source fusion approaches. The ...