In 2008, I entered a programming competition called the Dice Tech Challenge. I submitted the winning entry, a widget called “OrbTrak”, that tracks the orbits of artificial satellites in real-time.
OrbTrak runs completely client-side and doesn’t contact the server after it loads. Therefore, instead of polling for updated satellite locations, it must predict orbits using complex math. I’m no math genius, so I ported an open source C program called PREDICT to JavaScript and made it into a library called “PredictLib”.
Due to increased demand, OrbTrak is now available on Bitbucket, which means you no longer have to email me for a copy of the source. Thanks for everybody’s patience on this.
https://bitbucket.org/andrewtwest/orbtrak
Disclaimer:
Please keep in mind that this is basically a direct port from C to JavaScript, and that I removed the comments. It does not use any nice libraries like jQuery, and there are lots of parseInt() and parseFloat() calls. In other words, I hacked it together in a few days and it’s pretty ugly. If it’s useful to you, that’s great.
The Public Void 