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I feel establishing indoor positioning using device GPS is questionable unless the Capitol has an indoor GPS repeater.
by bmoreoutside 6y ago
I feel establishing indoor positioning using device GPS is questionable unless the Capitol has an indoor GPS repeater.
- local_dev 6y agoExtremely questionable. GPS accuracy even outside isn't perfect and GPS accuracy inside is a crap shoot depending on the building. Someone could have been walking past outside and be shown as inside the building.
- kersplody 6y agoThe building has LTE repeaters, micro-cells, and wifi networks. A tight geo is very possible with assisted GPS.
- colsandurz 6y agoNot really. To geolocate a user the cell providers would need to know the absolute position of all the LTE repeaters and cells (which they might). But they'd also need to compensate for indoor propagation (which is much more complex than outdoor). Also AGPS only provides satellite ephemeris, which enables a faster time to fix, not better accuracy.
- colsandurz 6y agoA GPS repeater would only give accurate time, not position. The repeater only repeats the signal that's captured by the antenna on the roof. I use GPS repeaters frequently in my labs to supply timing to instruments.