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> it's a proper satellite fix, with the precision to give turn-by-turn navigation instructions in good time That’s not entirely true. Phones do sensor fusion w
by jsjohnst 3y ago
> it's a proper satellite fix, with the precision to give turn-by-turn navigation instructions in good time
That’s not entirely true. Phones do sensor fusion when doing turn by turn navigation. Accelerometer, gyro, and barometer are especially taken into account, but also compass and trilateration via WiFi and cellular sources as well.
- spacecadet 3y agoDropped in just to say, no one understands GPS, including 99% of hacks and tech people... Go buy a $5 dongle and stream the feed, its just lat/long repeating maybe sometimes a altitude... but its still very weak and very unreliable... with mobile phones pulling wool to make you all believe its turn by turn. Ok bye.
- jsjohnst 3y ago> Dropped in just to say, no one understands GPS, including 99% of hacks and tech people... Go buy a $5 dongle and stream the feed, its just lat/long repeating maybe sometimes a altitude... So you’re also one of the 99%! That “feed” isn’t the GPS signal, it’s the output of your cheap device. ;) There are folks here however who are intimately familiar with gold codes, legendre sequences, Jaffe-Rechtin phase locked loops, RHCP signals, URA vs URE, etc.
- spacecadet 3y agoThanks Karen! Was suggesting people learn these concepts through the use of a usb dongle, but turns out you're the dongle.
- lxgr 3y agoGoogle does something pretty clever specifically for urban canyons too: https://blog.research.google/2019/02/using-global-localization-to-improve.html https://blog.research.google/2019/02/using-global-localizati... In my (limited, I don't often use my Pixel) experience, it does work much better than my iPhone's GPS, which often wants me to use the camera (in Apple and Google Maps) for urban canyon navigation using visual sensor fusion.