Is Android using NTP to sync time?

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http://stackoverflow.com – i wanted to ask if Android Devices uses the network time protocol (ntp) to synchronize the time. In my Device-Settings i see a checkbox with the following text "synchronize with network", but i dont know if they are using ntp. I need this for my Bachelor Thesis for which i use GPS. To get a accurate GPS-signal the receiver should have a exact clock. I found this blog-entry on the web, but im not sure if he tell the trueth: http://kousik.blogspot.de/2012/02/speeding-up-ntp-gps-lock-in-android.html Thanks for helping! (HowTos)