[ntp:questions] Meinberg ntp server and zeros after the point in time field $GPRMC

David Taylor david-taylor at blueyonder.co.uk.invalid
Wed Aug 7 06:42:07 UTC 2013

On 06/08/2013 19:30, poi_83 at mail.ru wrote:
> I have 2 GPS receiver, which I want to use for the ntp server.
> 1. Trimble Lassen IQ
> 2. Navia ML8088s
> First I was able to set up to work with
> It has the format
> $GPRMC,154024.00,A,4853.7462,N,02652.2962,E,000.3,318.9,060813,03.9,E,A*04(two
> zeros after the point in time field)
> And the second one does not work
> It has the format
> $GPRMC,154024.000,A,4853.7462,N,02652.2962,E,000.3,318.9,060813,03.9,E,A*04(three
> zeros after the point in time field)
> How to configure the Meinberg ntp server software so that it viewed the
> following format


As I said in my e-mail, I can't answer your question as I don't know 
enough about the internal configuration, but I would be very surprised 
if the number of decimal places mattered.  No chance one PC has the 
period and the other the comma as the decimal separator?  You may even 
have found a bug!

Are the two sentences above actual sentences, or simulated?  I ask 
because if they are actual sentences I am surprised that the checksum 
(the *04) is the same.  Also, I don't understand what the final "A" just 
before the checksum is.  It's not mentioned here:


but it is mentioned here:


and appears to be for NMEA 3.00.  I don't know what version of NMEA NTP 
supports - you would need to visit the source code to be sure.
Web: http://www.satsignal.eu

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