For a while they had a paid program, I had a Windows Mobile app I could run with an external GPS dongle that would record wifi APs and location, upload to skyhook, who would occasionally cut me a check for my trouble. I made tens of dollars!
My phone doesn't take several minutes to get a GPS fix even when I'm in the middle of nowhere well beyond the range of cell towers let alone wifi routers...
I understand that in theory it could if it had no clue what time it was either for some reason... but in practice we're talking seconds (though more than 2) not minutes.
I feel like that's not a true cold GPS signal! Though I'm not arguing the parents scenario is realistic either. I got a GPS module for a drone I was building and it took 20 minutes to get a proper GPS lock from cold!!! I was sitting there watching betaflight doing it's thing wondering why the heck it takes so long when there's so many satellites in view!
You're right that it's not a true cold GPS signal. I've connected to the network in the last 180 days (and thus have information on satellite information), I have a rough clock (time within 20s or so). The phone probably assumes it's closeish to where it last turned on. Etc.
It is the realistic scenario that people would face without using WiFi routers or cell towers though. True cold fixes aren't something phones need to deal with basically ever.
It doesn't need to be a cold GPS signal, it only needs to be one that doesn't track you. Your drone doesn't have access to the internet to do the almanac and ephemeris download, that's the difference.
Aiding the fix by obtaining data from a faster unidirectional source (instead of satellite to device, it's just internet to device) doesn't reveal anything private, unlike mass-capture of WiFi (B)SSIDs.
Also, I would look into the quality of the GPS radio and antenna you are using - $95 u-blox modules will get an RTK-quality fix without outside assistance in minutes.
20minutes just means a shitty module or lots of ~1.3ghz noise (e.g. from dji o3/o4 or gopro cpu), although bad input filtering and gps located near an antenna could saturate the amplifier even with antenna on a different frequency. 1min is typical for cold fixes but you can make it faster by uploading ephemeris/cache using AssistNow (valid for about a month).
The same physical location showing a different SSID every week but the surrounding ones not changing would be deanonymizing you much more aggressively.
People mostly don't change SSIDs or even move networking hardware - e.g. AirBnBs.
Edit: and also are you still carrying a smart phone while doing this? The device which has GPS and a cloud internet connection?
Worth noting that the coordinates for cell towers returned by the WLOC API are coarse enough to be just about useless for locating towers. For APs it’s much better but still not great.
Interesting, wondering why Apple doesn't restrict the queries to its server using a certificate that would be pinned on the devices, etc, so at least you would need a legit iPhone/Mac to be able to do a query?
For a while they had a paid program, I had a Windows Mobile app I could run with an external GPS dongle that would record wifi APs and location, upload to skyhook, who would occasionally cut me a check for my trouble. I made tens of dollars!
https://www.nytimes.com/2009/06/01/technology/start-ups/01lo...
Permanent hardware or software IDs, such as the Windows GUID or machine-id on Linux (systemd) are inevitably abused for surveillance sooner or later.
My phone doesn't take several minutes to get a GPS fix even when I'm in the middle of nowhere well beyond the range of cell towers let alone wifi routers...
I understand that in theory it could if it had no clue what time it was either for some reason... but in practice we're talking seconds (though more than 2) not minutes.
It is the realistic scenario that people would face without using WiFi routers or cell towers though. True cold fixes aren't something phones need to deal with basically ever.
Aiding the fix by obtaining data from a faster unidirectional source (instead of satellite to device, it's just internet to device) doesn't reveal anything private, unlike mass-capture of WiFi (B)SSIDs.
Also, I would look into the quality of the GPS radio and antenna you are using - $95 u-blox modules will get an RTK-quality fix without outside assistance in minutes.
People mostly don't change SSIDs or even move networking hardware - e.g. AirBnBs.
Edit: and also are you still carrying a smart phone while doing this? The device which has GPS and a cloud internet connection?
Which will likely get cut off at some point.