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A comment on Companies use smartphone locations to help advertisers and even hedge funds. Parent comment

Re:Companies use smartphone locations to help advertisers an... by reaperducer on Monday December 10, 2018 @04:04PM (#18651153)
To know your location, the receiver needs the GPS ephemeris and almanac data (basically the status/location/trajectories of the GPS satellites). This is transmitted by the satellites themselves, but extremely slowly (50 bps with the entire navigation message taking 12.5 minutes)

Thanks for explaining that. It explains why when I interfaced a GPS receiver yanked out of a 2001 minivan it took so long to lock into a location with my Palm Pilot.

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