Viewing profile — codyd51

I believe this is not the case in today’s ubiquitous equal temperament?

The waveform produced by sounding a note on most physical instruments will often not exhibit a peak, or will not exhibit the strongest peak, on the note being sounded. Rather, most…

Hi, author of axle here - thank you for the shout out! It’s been a wonderfully fun and enriching project to work on over the years. I’m now working on XNU at Apple, so won’t be wor…

One potential hiccup with your one-photino-bird-universe theory (which is quite fun!): I believe I remember a scene in which the ‘birth’ of a photino bird was described. If I remem…

What a wonderful thing to say about a stranger's article! Thank you very much for posting this.

Whoa, thank you! I don't know much about RF and learned ad-hoc for this project, and it seems perfectly plausible to me that someone knowledgeable would be able to look at this and…

Thank you for linking this, this course is phenomenal! Several of the videos were immensely helpful in my GPS journey.

Thank you very much for your thoughtful offer! I won't be able to readily work on side projects after starting my new role next week, and am content to consider this project comple…

I believe you are correct. My understanding is that the root P key is rotated daily, and needs to be manually uploaded to any military hardware that needs to use it.

Thank you very much! I agree, they are incredible! I really had no idea until making this project, and it makes things like cellular phones so astoundingly impressive.

This project only supports the 'legacy' C/A variant of the NAVSTAR constellation's signals.

Thank you for sharing this! It is sort of a vulnerable thing to write, because it reveals the shapes and bounds of my own ignorance, and the path I took to learning. I am really gr…

I am really grateful for this nice comment, thank you! As a self taught programmer with no background in RF or EE, this project was definitely a stretch for me and involved lots of…

Thank you very much!

That's so great to hear, thank you for the nice feedback!

This is amazing! I had no idea tech like this was available on the market. Thank you for the correction.

Yes, I forgot to mention downloading the orbital parameters over the network! Thanks for mentioning this as well. In this case, I was meaning to refer to brute-forcing the Doppler-…

GPS jamming or spoofing on a wide scale is definitely a viable attack! As another commenter noted well, making everyone appear at exactly the same location would be nigh-impossible…

Hi! Yes, "from scratch" is definitely always a bit of a funny term. I also implemented the receiver in Python, which is quite far from "scratch" =). What I mean by it in this conte…

Hi everyone! Shortly after publishing my iOS 4 jailbreak last October[1], I got to work on my next hobby project: a from-scratch homebrew GPS receiver, which can solve the user’s l…

Yes, you're absolutely correct! The design here totally suffers from unbounded memory use if you draw onto a large canvas. (Restating parts of your comment for confirmation that th…

Thanks very much! The other commenter is correct that the work loop typically revolved around booting a QEMU instance which ships my UEFI application. The main run script will rege…

Wow, thank you so much! I made these using HTML canvases and TypeScript. I’m drawing everything in code, including the pixel art (which is defined in the source). The animations ar…

Ha! I take your point.