What does HackerNews think of gnss-sdr?

GNSS-SDR, an open-source software-defined GNSS receiver

Language: C++

#32 in C++
Calculating Position from Raw GPS Data (2017) | Apr 2023
If you're interested in running some code, there's [1] which is fairly active, but as I recall is Linux only. There is also [2] which is a Matlab (or Octave) GNSS receiver implementation; quite well documented and informative. It's meant to be a companion to the author's book [3], which itself I found quite concise and approachable.

[1] https://github.com/gnss-sdr/gnss-sdr [2] https://github.com/perrysou/GNSS_SDR [3] http://gfix.dk/matlab-gnss-sdr-book/

GitHub shuts off access to Aurelia repository, citing trade sanctions | Mar 2020
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Do you believe that trade regulations such as ITAR apply to publicly-available open source software? I do not¹, and it appears that your employees do not believe this either. GitHub is currently hosting multiple GPS implementations² that are clearly against this line in your ToS, in addition to also being against ITAR by not implementing speed limits for missiles:

"GitHub may not be used for purposes prohibited under applicable export control laws, including purposes related to the development, production, or use of […] long range missiles or unmanned aerial vehicles."

I think you should probably make a blog post explaining GitHub's stance on this issue.

[1]: https://www.unr.edu/sponsored-projects/compliance/export-con...

[2]: One of which is https://github.com/gnss-sdr/gnss-sdr. This repository does not implement ITAR-required GPS speed limits. Even if it was ITAR-compliant, the limits could easily be removed as it is open source software.

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Update: GitHub has updated their ToS to remove this line. It was present on July 27, 2019. The issue still stands with this current statement from their ToS ( https://help.github.com/en/github/site-policy/github-and-tra...), which forbids ITAR-regulated software:

"Users are responsible for ensuring that the content they develop and share on GitHub.com complies with the U.S. export control laws, including the EAR and the U.S. International Traffic in Arms Regulations (ITAR). The cloud-hosted service offering available at GitHub.com has not been designed to host data subject to the ITAR and does not currently offer the ability to restrict repository access by country."
GPS Flaw: Security Expert Says He Won't Fly April 6 | Mar 2019
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Having worked on gps chipsets, one of the corrections that need to be applied is for relativistic effects,those calculations are happening in every GPS chipset as it needs to iterate down to a very precise position estimation of the satellites in order to produce an estimation of your position. There is no magic involved, relativity/time-dilation is not a disputed effect.

As an example, clone https://github.com/gnss-sdr/gnss-sdr and search for "relativistic correction"