02-02-2016, 04:08 PM
(This post was last modified: 02-02-2016, 04:10 PM by chrismiller.)
The reason phones produce a location fix much faster is because they are able to download the almanac data to speed up gps fixes from the internet. GPS receivers without a cell connection cannot do this, so either have to wait for this to be received from the satellite (12.5 minutes) or have a recent one in memory. This gives a rough location. After which the ephemeris for visible satellites is received which yields the precise location.