iPhone 14 Pro comes with dual-frequency GPS

Re:iPhone 14 Pro comes with dual-frequency GPS by s1mon on Saturday September 10, 2022 @02:01PM (#32792953)

I live in San Francisco. We don't exactly have the tallest buildings, but I can assure you from years of tracking runs in the downtown area here and nearby forested areas, GPS gets very screwed up unless it has a clear view of the sky. This is with a variety of Garmins, Apple iPhones and Apple Watch. I'm looking forward to the newer devices with L5.

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Re:iPhone 14 Pro comes with dual-frequency GPS by londons_explore on Saturday September 10, 2022 @02:13PM (#32793078)

It's known as the 'urban canyon' effect.

It can be significantly reduced if the GPS has access to a 3d model of the nearby buildings - then the GPS can guess which signals are probably reflections and which are direct.

Alas, I think this isn't done outside data centers/labs, because the data download to have a large 3d model to get a GPS fix isn't a service anyone wants to run for free.

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Re:iPhone 14 Pro comes with dual-frequency GPS by sorenjan on Saturday September 10, 2022 @02:28PM (#32793239)

Uber showed this in 2018, I don't know how widely used it is now. I doubt any phone app uses it offline at least.

https://www.uber.com/en-SE/blog/rethinking-gps/

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Re:iPhone 14 Pro comes with dual-frequency GPS by netheril96 on Saturday September 10, 2022 @11:38PM (#32796620)

Given how many Android phones already have this, maybe you could borrow one and compare? I want to know the answer.

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