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As long as you already have the app and photo on your phone it just uses the compass and GPS, which are both sensors built in to the iPhone and don't require in
by gohnjanotis 11y ago
As long as you already have the app and photo on your phone it just uses the compass and GPS, which are both sensors built in to the iPhone and don't require internet.
- thesimpsons1022 11y agosorry. I'm an idiot and didn't think about gps seperately from internet
- gohnjanotis 11y agoIt's a pretty good point actually! Because Airplane Mode disables GPS on the iPhone.
- michaelmior 11y agoThat's a little odd. Isn't GPS generally completely passive? That is, it should not be possible to cause any sort of interference.
- gohnjanotis 11y agoI thought it was passive, too. I've googled a little in the past and some people say it's in the same chip as the cellular radios (and the whole chip gets knocked out in Airplane Mode). Others say the amplification of signals necessary could cause interference.
- mcculley 11y agoA radio receiver often uses a signal of an intermediate frequency: http://en.wikipedia.org/wiki/Intermediate_frequency http://en.wikipedia.org/wiki/Intermediate_frequency So a receiver that would appear functionally to be passive could still conceivably cause interference.
- deleted 11y ago[deleted]
- michaelmior 11y agoCool. Was not aware of the usage of intermediate frequencies in radio receivers. Thanks for the knowledge :)
- icebraining 11y agoPhones often use A-GPS, which includes an active component: http://en.m.wikipedia.org/wiki/Assisted_GPS http://en.m.wikipedia.org/wiki/Assisted_GPS
- michaelmior 11y agoThis is true, but it seems like it should not be hard to disable AGPS in airplane mode.