(10-31-2015, 10:19 AM)justMongo Wrote: I've never gotten a reliable signal from WWV Ft Collins.
Why don't they make a clock that gets a time signal from one GPS bird?
I think there are GPS clocks that do this, but unfortunately, they're not the cheap consumer grade stuff. The GPS time clock does NOT take leap seconds into account. However, there is data in the GPS signal that provides the offset between GPS time and CUT standard time.
I bought a prepaid Moto E Android phone the other day for $29. It works fine without being activated with a cell network and has a GPS. I guess you could use it as a GPS clock, but Androids supposedly synch the clock to GPS, but don't do the leap second adjustment. http://www.zdnet.com/article/the-time-di...-is-wrong/
The article is a few years old. Maybe Google finally fixed it by now. I need to play with mine and experiment on this. Mine is currently about 4 seconds out of synch, which makes not sense in a "GPS" sense. It did do the DST shift.
The GPS essentials app DOES show the correct UTC time synched to the leap seconds.
I guess you could buy a cheap android and use it as a GPS based clock, but the time handling still seems a little wonky. GPS Essentials seems to show the correct time, even if Android time is off, but it's just a tiny little time display. It seems someone could make a good "correct" GPS time display app that uses the whole display.
There's a new phase modulation scheme that's been added to WWVB. Supposedly, it is much easier to pick up. Unfortunately, there don't seem to be many (any?) cheap clocks that pick it up.