Re: GPS M12+ Motorola: Time accuracy
From: Richard B. Gilbert (rgilbert88_at_comcast.net)
Date: 09/04/04
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Date: Sat, 04 Sep 2004 07:44:39 -0400
fm@nowhere.invalid wrote:
>In comp.protocols.time.ntp Mayte <maytemanrique@hotmail.com> wrote:
>
>
> <snip>
>
>>The time included in the @@Hb answer has the
>>format hmsffff: hours, minutes, seconds,
>>fractional second(ns). Is this the exact GPS
>>time?
>>
>>
>
>Not exactly.
>My understanding of that time, is that it is the
>receiver local time (used internally) vs GPS time
>or UTC time. The difference with GPS time is
>supposed to be allways less than 1 ms.
>
>-- francois meyer
>
The receiver has no reason to use "local time" for anything. What it
gets from the satellites and what it reports via the serial port is the
UTC time stamp for the leading edge of the most recent PPS pulse. The
report may be sent as much as fifty milliseonds after the pulse.
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