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Comment by willvarfar | Hacker News Reader

Trivia: a long time ago when an sqlite file was found on the iphone that has a full location history, some random HNer connected with me to make a web app that let the user see their location history if they uploaded their file.

And IIRC all iphones had a first test GPS fix from somewhere in the mid US. We speculated that it was part of a factory quality check or something.

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Sounds more like https://theweek.com/articles/624040/how-internet-mapping-gli...

That's turning locations into coordinates (ip geolocation). It's to be expected that the gps log only bases their logs on the coordinates from the GPS from the phone.

It'd be more practical to have a faraday cage and several GPS transmitters to spoof a location (let's say 33.783, -118.14899); turn on the device, if it tells you it's located at 33.783, -118.14899, then it's GPS receiver is working correctly, anywhere else, then there's something wrong...

Reminds me of an anecdote that getting a rideshare in Moscow is difficult nowadays, because GPS for the whole city is jammed and the driver won't be able to find you.

Probably don't even need a cage, GPS signals are so weak you could probably overpower them with even the weakest jammer/transmitter

My GPS location doesn't work in most buildings (with locating via WiFi turned off).

Is it easier to spoof GPS transmissions such that the phone will calculate it's at a specific coordinate? Rather than just check where they are reporting?

I thought that Russians used GLONASS, not the GPS.

If they're worried about someone guiding missiles with satnav, they are probably jamming those both plus the European one, would be my guess, or since they control their own GLONASS system they could be encrypting it if it supports that, or shutting it down in those areas.

There are 4 major global coverage ones plus the JP one (QZSS) and iirc also some recent Indian.

The major ones are GPS, Galileo, Glonass, Baidou.

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