[time-nuts] sub-minute time-precision in court-case

[Alan Melia]

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" <mikes at flatsurface.com>
To: <time-nuts at febo.com>
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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