Message Order

[Tim Reid]

Jonathan Hutchins wrote:
> On Wednesday 19 November 2003 08:58 am, Zscoundrel wrote:
> 
> 
>>On my Red Hat system, I selected Main Menu, System Settings, Date & Time
>>and enabled network time protocol.  This causes the system to stay in
>>sync with a time server.
> 
> 
>>I have one of those atomic clock thingys that listen to the WWIV
>>broadcast and the computer and the atomic clock always stay within a
>>couple of seconds of each other all the time.
> 
> 
> If you need something more accurate, within a second, a GPS with a serial port 
> will give very accurate time for the NTP server.
> 
> 
> 
> 
> 

YMMV, but even GPSr's (GPS receivers) don't always give accurate UTC 
time.  As I've been told, you have to wait 12+ minutes to recieve the 
full GPS NAV. message along with the correction for the GPS time 
difference from UTC.  Then, depending on your GPSr setup, the NEMA 
sentence received through the serial port is 1-4 seconds later than the 
time that the GPSr is receiving from the sats.  Basicly, your time 
difference with the GPSr method may be up to 15-16 seconds of difference 
from UTC.

read http://gpsinformation.net/main/gpstime.htm for more info.

Then you have to worry about getting a good signal from the geosync. 
sats. that transmit the GPS signals.  The signals don't penetrate (sp?) 
concrete walls and other building materials well.

:D  However, attaching a GPSr to your computer is still more accurate 
than not, so maybe I'm being overly pedantic.  :D

Tim