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You may be interested in knowing that Android has exposed raw GNSS measurements through public APIs [0,1] so anybody can build their own raw processing engines

• myself248 4y ago
  Is anyone actually doing that? I see a build of RTKLIB but it's not actually using the Android GNSS API, it's just using your Android phone as a processor to handle data coming from an external Ublox receiver. Aww.
  • londons_explore 4y ago
    The android API exposes basically the same data that would come down the serial link from a 90's era GPS receiver plugged into a PC. That's the position estimate, information about satellite orbits, signal strengths and pseudoranges. The data doesn't include the raw baseband information necessary to, for example, do carrier phase locking or to do a fully software implementation of GPS decoding.
    • skzv 4y ago
      It actually exposes carrier information to do carrier-wave positioning as well [0, 1] There's also an API to specify an antenna pattern [2] [0] https://developer.android.com/reference/android/location/GnssMeasurement#getCarrierCycles https://developer.android.com/reference/android/location/Gns...() [1] https://developer.android.com/reference/android/location/GnssMeasurement#getCarrierPhase https://developer.android.com/reference/android/location/Gns...() [2] https://developer.android.com/reference/android/location/GnssAntennaInfo https://developer.android.com/reference/android/location/Gns...