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 ...
This article originally appeared in the March 11, 2019 issue of SpaceNews magazine. The U.S. Global Positioning System — the constellation of military satellites that provides positioning, navigation ...
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