gpsGuys

A basic mock location app like this labels its output locations as fake to the operating system. https://developer.android.com/reference/android/location/Loc...() will return true. Apps can choose to ignore the fake locations and use a last known location instead.

So maybe it's just displaying the last known location, rather than somehow getting your current location?

Wow, this is a great resource! Major props to Bartosz Ciechanowski. It's rare to see the time aspects of GPS covered so well.

Yes, the thin laptop style usually.

Hey, this is excellent work! Feel free to email me at iland at uber.com if you are interested in working on GNSS Shadowing at Uber.

Thank you for the kind words.

Thank you! Having a designer replace our stick figure and clip art satellite reflection and LOS/NLOS images definitely helped. Some of the images were originally created for the company all-hands meeting, so it wasn't all from scratch for the blog post.

Yes, Chicago is one of the toughest cities for GPS in the US.

Here's a peek into average building heights in downtown Chicago. Anywhere red, yellow, or orange we expect to have poor sky visibility. GLONASS being more popular has made Chicago slightly less challenging, before you could have trouble even seeing enough satellites to get a fix.

https://imgur.com/a/3bjiiRw

Yeah, exactly. DOP can provide an artificially rosy picture of the satellite geometry and visibility when you have clean reflections that looks like LOS satellites.

Yes, using measurements from multiple receivers could definitely help :)

If you're interested in working on that kind of thing please apply to the positions at the bottom of the blog post.

https://www.uber.com/careers/list/14345/

Common sense to use a U-lock but not enough common sense to not leave anything you own in the Tenderloin overnight.

Yes, this is true! If you are interested in working on this kind of thing, please reach out to me via HN messaging.