I remember a lecture by an officer of the (London) Met Police about how
tracable time was essential to demolishing the defence of "wrong clock" in
accidents involving the illegal use of mobile phones when moving and even
parking meter tickets. They had to argue why the cell time was "more right"
than the defendants watch!! This was part of a meeting of the Time and
Frequency Club at the NPL at Teddington about 6 years ago.
Alan
G3NYK
..
----- Original Message -----
From: "Mike S" <[email protected]>
To: <[email protected]>
Sent: Tuesday, September 03, 2013 5:19 PM
Subject: Re: [time-nuts] sub-minute time-precision in court-case
On 9/3/2013 10:56 AM, Jim Lux wrote:
In this case, all the messages were presumably handled by the same
carrier, so the issue of skew in timestamps is negligible; they're all
presumably running off the same clock.
But not necessarily the same time. For instance, some cell systems run on
GPS time, but the carrier may keep records in UTC, since it's the legal
time in most jurisdictions. A phone might time stamp using either (Google
has a years-old bug in Android which lets it use GPS time and not UTC).
So, different devices on the same network may not be in sync.
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