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Current attempts are even looking for multipath interferences for biological objects, such as viruses5.

One confusing effect is multipath fading, in which satellites signals that bounce off of buildings that intersect with each other, strengthening certain signals that aren’t otherwise in direct line of sight.

Ray tracing, multipath fading, and heat maps Later, we go for a stroll on the west side of Manhattan so they can show me how much better the modified version of Uber’s app is at finding our GPS location.

Also, says Martin, there is an accuracy problem caused by something called multipath.

It's called multipath interference, and if you've ever seen ghosting on old-style analog televisions, you've seen its effects.