Originally Posted by
Ninthace
What about gps time?
My Ceptor is pretty spot on with the TV and FM Radio, via the aerial rather than the web. Too far in the sticks for DAB. My car has a DAB option. On the 12 mile drive to the shops, I get around 4 mins of audio, the rest is no signal!
There are a lot of misconceptions about time! Your Casio Waveceptor, and my Citizen ECO-Drive both get their time settings from 60 kHz transmitters, MSF in Althorn, UK,
https://en.wikipedia.org/wiki/Time_from_NPL_(MSF)
(NPL = National Physical Laboratory)
and WWV in Fort Collins CO,
https://en.wikipedia.org/wiki/WWVB
I believe there is also a 60kHz station in China.
These are both synced to atomic clocks and have unquestionable accuracy.
There seems to be a misconception amongst many that these watches use GPS time, which is incorrect.
In my car I have an amateur radio set that uses GPS time, and it agrees exactly with my watch, as well as the Canadian Time Signal on 3330 kHz, CHU.
However, the Canadian Broadcasting Corporation, every day at 13h00, sends out the pips of the CHU station over its FM network, and they are 11 seconds delayed. They always used to be 1 second late, due to the propagation delay of the OC3 network, but recently somebody added a delay without realising that they were delaying the time signal!
Years ago, Rogers Cable TV put out the CHU signal 3-4 seconds late, due to satellite up-down delay. I managed to get that stopped with a phone call to a friend at the NRC. He has since retired so I cannot do anything about the CBC!
My Ford Escort also has a feature to sync to GPS time, but I have seen it up to two minutes out after syncing. Go figure!
'Windows time' was once notoriously erratic, until Bill Gates discovered TCP/IP. Using the internet, one can get atomic clock time from many research institutes around the world. I know, Victoria, you are going to say that there is a delay in the internet, but NTP (Network Time Protocol) cancels that but measuring the delay in getting a response and deducts half that when setting the computer time!
No, I don't have OCD. It's CDO if you put the letters in the correct alphabetical order :-)