On Sun, Jan 15, 2017 at 6:23 AM, Andrew Rodland <and...@cleverdomain.org> wrote: > Relatedly, and just for fun, here's a video I made several years ago > from a few days worth of constellation status data out of a cheap SiRF > receiver. It's interesting to see how the satellite geometry changes > over time... or maybe it's just fun to watch the pretty colors. If > you're observant you can also get an idea for where the tall trees > were at my old apartment and maybe my approximate latitude. > > The projection is stereographic from the nadir (I think), with 90° > elevation at the center, 0° elevation at the edges, and north up. The > "wiggles" near the edges are due to the granularity of the positions > from the receiver (half-degree, IIRC). Points are drawn with size and > brightness proportional to the log signal strength, and the trails > fade out exponentially. >
And here is the actual video: https://www.youtube.com/watch?v=VZHK1c54YRk -- sorry about the suspense. Andrew _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
