3 ms·

Why is the satellite range restricted to a meter? Are the mobiles not capable of better accuracy or is it the limitation of the satellite?

• JaimeThompson 5y ago
  The get higher accuracy requires more precise hardware / additional hardware on the receiving end which drastically drives up the cost. Systems like this [1] which you may have seen being used on construction sites allow much higher accuracy. [1]https://en.wikipedia.org/wiki/Differential_GPS https://en.wikipedia.org/wiki/Differential_GPS
  • anfractuosity 5y ago
    Is it possible to get close to centimetre accuracy without using ground stations like DGPS? Would you get finer resolution if a GPS receiver also used an atomic clock? I thought this was interesting - https://www.gps.gov/systems/gps/performance/accuracy/#difference https://www.gps.gov/systems/gps/performance/accuracy/#differ... the difference between military GPS and civilian GPS sounds like it uses 2 frequencies.
    • lallysingh 5y ago
      Effectively the problem is that the atmosphere (mostly ionosphere) distorts the ranges a bit. Different frequencies distort differently so you can use data from two to compensate. IIRC, used to work in a gps accuracy firm many many years ago