{"id":20960579,"url":"https://github.com/natronics/gps","last_synced_at":"2025-05-14T07:30:39.273Z","repository":{"id":23675267,"uuid":"27046602","full_name":"natronics/gps","owner":"natronics","description":"Decoding GPS. Follow along with PSAS GPS class","archived":false,"fork":false,"pushed_at":"2016-04-17T22:47:24.000Z","size":1280,"stargazers_count":10,"open_issues_count":0,"forks_count":4,"subscribers_count":3,"default_branch":"master","last_synced_at":"2025-04-02T14:21:42.708Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":null,"language":"Jupyter Notebook","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"gpl-2.0","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/natronics.png","metadata":{"files":{"readme":"README.markdown","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2014-11-23T20:34:30.000Z","updated_at":"2024-01-12T14:19:04.000Z","dependencies_parsed_at":"2022-08-21T21:00:20.386Z","dependency_job_id":null,"html_url":"https://github.com/natronics/gps","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/natronics%2Fgps","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/natronics%2Fgps/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/natronics%2Fgps/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/natronics%2Fgps/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/natronics","download_url":"https://codeload.github.com/natronics/gps/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":254094748,"owners_count":22013632,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2024-11-19T01:59:38.397Z","updated_at":"2025-05-14T07:30:38.050Z","avatar_url":"https://github.com/natronics.png","language":"Jupyter Notebook","funding_links":[],"categories":[],"sub_categories":[],"readme":"# GPS Decoding\n\nSome of my blog posts about GPS:\n\n - [GPS Visualization](http://natronics.github.io/blag/2014/gps-viz-1)\n - [The GPS PRN](http://natronics.github.io/blag/2014/gps-prn)\n - [GSP Spreading](http://natronics.github.io/blag/2014/gps-spreading)\n\n## Finding the C/A Code\n\nUsing 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.\n\nIPython Notebook graphing the results:\n\n\u003chttps://nbviewer.jupyter.org/github/natronics/gps/blob/master/notebooks/cross-correlation.ipynb\u003e\n\n\n## The Raw Data\n\nWe've been using a sample data set recorded by amateur radio enthusiasts.\nThe dataset I'm writing this decoder against is from the\n[GNSS-SDR project](http://www.gnss-sdr.org/)\n\n - [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_)\n\n\n## Run This Yourself\n\nMake sure you have dependencies:\n\n    $ pip install -r requirements.txt\n\nTo run the program, pipe the datafile into `gps.py`:\n\n    $ ./gps.py \u003c PATH/TO/DATA.dat\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fnatronics%2Fgps","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fnatronics%2Fgps","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fnatronics%2Fgps/lists"}