A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Position-Finding
From: Bob Goethe
Date: 2019 Jan 10, 10:54 -0800
As we are discussing radio time signals, I just yesterday loaded an Android app on my phone called "GPS Time". Once you start the app, there is a bit of a delay as it acquires signals from multiple GPS satellites and then it gives you the time. It requires no Internet connection to work.
I have long used an app called "ClockSync", which gives network (or Internet) time - which it calls "Atomic Time".
Apps that give network time typically attempt to measure and compensate for network delays between your device and the time server you are connecting to.
I am assuming (hoping?) that the "GPS Time" application compensates for the travel time for the signals from the various satellites to my phone.
At this moment on my phone, the GPS time I get is 0.785 seconds ahead of the network time I get from ClockSync.
I have used WWV time signals since 1969, and feel a little bit sad that they are (apparently) going away. But if this GPS Time app indeed works from any location on earth, as it appears it should, then I can receive correct time on my phone: a device much more compact even than the small, battery powered shortwave receiver that I use.