[time-nuts] GPS/UTC time

paul swed paulswedb at gmail.com
Sat Jul 4 13:33:11 UTC 2015


Steve has it right. GPS/atomic time is always right and our earthly time
frame is always slowing down. Though as time passes it seems it speeds up.
Must be some relativistic effect but only for humans?
Your system would not show this issue until you compared it to our time
from say WWV. Thats why the little WWVB clocks did not show the change
until they re-sampled time typically one time a day.
Regards
Paul
WB8TSL

On Sat, Jul 4, 2015 at 4:26 AM, Steve Platt <steve.platt at ntlworld.com>
wrote:

> > surely the GPS time isn’t run incorrectly forever.
>
> Yes it is :-)
>
> In simple terms, the integer part of the drift is removed by inserting
> extra seconds every so often.
>
> A count of those seconds is part of the GPS data stream and s/w displays
> which timeframe you select.
>
> Steve
> --
> Steve Platt
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