Android GNSS

Intro

This repo aims to demonstrate how to process Google's GNSS RAW measurements in python, with the main aim of:

• explain the mechanism of calculating GNSS observations, especially pseudorages in Android N;
• it is not per-say intended as a python equivalent of GPS Measurement Tools from the Goggle written in Matlab but more a teaching tool, allowing to understand the concepts behind.

Files

This repo consist of the following:

• ProcessRanges.ipynb - explains how to calculate pseudoranges from RAW GNSS measurments, available since Android N. This is python 3.x code based on Paolo et al,2018¹ paper;

Background informations

• Differences between new API v.24 (Android Nougat 7.0) and previous versions are discussed in:
  • my 2nd Galileo Hackathon presentation
  • Research Seminar Presentation at the Nottingham Geospatial Institute.
  • my slides from the Galileo Hackathon held at the Where Camp Berlin.
• How is Android position calculated
• some other blogs
  • blackdot GNSS take on ION16's Android GNSS workshop
  • bitwise operations in python

Additional links

• my version of GPS Measurement tools, mostly added notes and easier installation

Footnotes

1. Paolo Crosta, Paolo Zoccarato, Rafael Lucas, G. De Pasquale (2018) Dual Frequency Mass-market Chips: Test Results and Ways to Optimize PVT Performance, Proceedings of ION GNSS+ 2018 ↩