I would actually prefer to not have any GNSS (GPS) receiver in the smart glasses in order to keep the weight down and battery life up. GNSS receiver can still be in a wrist device and just use the smart glasses as a display linked via ANT+.
GNSS accuracy is poor in forests, canyons, and dense urban environments due to line-of-sight obstructions and multipath reflections. The latest Navstar Block III satellites should improve that a little, but any real solution would require deploying additional satellites in geosynchronous orbit like the Japanese QZSS.
GNSS accuracy is poor in forests, canyons, and dense urban environments due to line-of-sight obstructions and multipath reflections. The latest Navstar Block III satellites should improve that a little, but any real solution would require deploying additional satellites in geosynchronous orbit like the Japanese QZSS.