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John Kasupski wrote:
Joke's on them. GPS time is implemented by the atomic clocks in the GPS ground control stations and the GPS satellites themselves. Since it is not updated with leap seconds, GPS is currently ahead of UTC by 14 seconds. That's a software bug. For location purposes, a leap second is a very bad thing when it happens. So it's better for GPS to ignore it, and if you really need accurate time, compenstate for the extra seconds in the routine that takes the GPS data and converts it to whatever you are using it for. It would not take much, a simple calculation of missed leap seconds subtracted from the current GPS time would do it perfectly. I wonder if the NTP (network time protocol) GPS drivers do it already? Geoff. -- Geoffrey S. Mendelson, Jerusalem, Israel N3OWJ/4X1GM IL Voice: (07)-7424-1667 U.S. Voice: 1-215-821-1838 Visit my 'blog at http://geoffstechno.livejournal.com/ |
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