The Galileo satellites metadata are information about the satellite properties which need to be known in order to properly implement advanced processing algorithms for precise orbit determination or Precise Point Positioning (PPP). These include physical characteristics such as mass, area or reflectivity, the attitude law and antenna parameters such as phase center offsets and variations. More information about PPP and GNSS data processing can be found in [3], [4] or [2]. For Galileo SIS details, please refer to [1].

[1] European GNSS (Galileo) Open Service Signal In Space Interface Control Document. European Union, 2016.
[2] B. Hofmann-Wellenhof. Global Positioning System Theory and Practice. Springer, 2001.
[3] J.M. Juan Zornoza J. Sanz Subirana, M. Hernández-Pajares. GNSS DATA PROCESSING. European Space Agency, 2013.
[4] A. Leick. GPS Satellite Surveying. Wiley-Interscience, 1994.

Work in progress, fixing old Kai Borre Matlab code to run in Octave and hence be callable by Python to work with RINEX data
Working on updating the code to run in modern Matlab and Octave for use with oct2py in calling from Python.
Currently the functions easy3.m easy4.m easy5.m run in Octave and Matlab, reading the default included files.
MIT license.

Article describing the state of dual-frequency GNSS reception on Android devices as of 2018-06.

uBlox NEO-M8T Reference Board with SMA antenna connectors for your RTK systems, UAV systems, Robots, RC, FPV or other projects. Ultra small and light.

Accelerating GNSS Software Receivers

Fernández-Prades, Carles; Arribas, Javier; Closas, Pau

This paper addresses both the efficiency and the portability of a computer program in charge of the baseband signal processing
of a GNSS receiver.

Has Galileo-capable receiver using uBlox {LEA,MAX,NEO}-M8[S] modules.

Module with uBlox NEO-M8T and antenna.

Show the visbility of GNSS satellites.
See https://github.com/taroz/GNSS-Radar for source and options which can be passed via the URL.

MTKBabel is a Perl program to operate the i-Blue 747 GPS data logger. It should work also with other GPS devices based on the MediaTek MTK chipset. Starting with version 0.7 it offers also support for the Holux M-241 data logger. It is free software released under the GPL license.

Piksi a single-frequency GPS/GNSS receiver. It delivers RTK functionality for centimeter-level relative positioning in a 53x53mm form factor. The Piksi receiver supports a high-performance, onboard Digital Signal Processor (DSP) and a flexible correlation accelerator.

Features
   Centimeter-level relative positioning (RTK)
   10 Hz position/velocity/time solutions for fast updates
   Open-source software and board design (the FPGA firmware is closed source)
   Low power consumption: 500mW typical
   Small form factor:    53x53mm
   USB and dual UART connectivity
   Full-rate raw sample pass-through over USB
   3-bit, 16.368 MS/s L1 front-end supports GPS and SBAS signals