https://github.com/natronics/gps

Decoding GPS. Follow along with PSAS GPS class
https://github.com/natronics/gps

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Decoding GPS. Follow along with PSAS GPS class

• Host: GitHub
• URL: https://github.com/natronics/gps
• Owner: natronics
• License: gpl-2.0
• Created: 2014-11-23T20:34:30.000Z (about 10 years ago)
• Default Branch: master
• Last Pushed: 2016-04-17T22:47:24.000Z (over 8 years ago)
• Last Synced: 2024-04-16T18:09:29.757Z (9 months ago)
• Language: Jupyter Notebook
• Size: 1.22 MB
• Stars: 10
• Watchers: 4
• Forks: 3
• Open Issues: 0
• Metadata Files:
  • Readme: README.markdown
  • License: LICENSE

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README

        
# GPS Decoding

Some of my blog posts about GPS:

 - [GPS Visualization](http://natronics.github.io/blag/2014/gps-viz-1)

 - [The GPS PRN](http://natronics.github.io/blag/2014/gps-prn)

 - [GSP Spreading](http://natronics.github.io/blag/2014/gps-spreading)

## Finding the C/A Code

Using the tiny library in this repo to generate copies of the C/A codes (see above blog posts) run over all the likely phase and doppler combinations to look for the code hidden in the raw signal.

IPython Notebook graphing the results:

## The Raw Data

We've been using a sample data set recorded by amateur radio enthusiasts.

The dataset I'm writing this decoder against is from the

[GNSS-SDR project](http://www.gnss-sdr.org/)

 - [2013_04_04_GNSS_SIGNAL_at_CTTC_SPAIN.tar.gz](http://sourceforge.net/projects/gnss-sdr/files/data/2013_04_04_GNSS_SIGNAL_at_CTTC_SPAIN.tar.gz/download) (_warning! 1.5 GB file_)

## Run This Yourself

Make sure you have dependencies:

    $ pip install -r requirements.txt

To run the program, pipe the datafile into `gps.py`:

    $ ./gps.py < PATH/TO/DATA.dat