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Re: [gpsd-users] GPS Time Synchronization

From: John Klug
Subject: Re: [gpsd-users] GPS Time Synchronization
Date: Fri, 19 May 2017 13:30:17 +0000

ntpd is what we use.  crony is also a possibility.  The PPS and GPS information 
are in separate shared memory locations, and with ntpd, these are configured as 
IP addresses.

Here is our ntp.conf patch file for default ntp usage:

John Klug
Senior Software Engineer

+1.763.785.5500      Direct

2205 Woodale Drive
Mounds View, MN 55112 USA

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From: gpsd-users address@hidden on behalf of Burton, John address@hidden
Sent: Thursday, May 18, 2017 6:21 PM
To: address@hidden
Subject: [gpsd-users] GPS Time Synchronization

Hi All!
I have what might or might not be an easy question.

  *   I have a computer running RedHat Enterprise Linux 7.3 that has GPS 
reciever attached to it that also provides a PPS signal. This computer is used 
as a real-time data acquisition system.
  *   I have configured the computer as described in<>
 to operate as a network clock. This works fine.
  *   One of the devices I am capturing data from is an INS/GPS system that 
provides a position and pointing data packet with a GPS timestamp (week since 
GPS epoch + seconds into the week).
  *   I also have other devices that I am acquiring data for that I am 
attaching a timestamp to. I am currently using the 
  *   I need to have all captured data using the same clock basis for the 
  *   How do I get GPS timestamp from my system clock?



John Burton, Ph.D.
MTEQ, Inc.

10440 Furnace Rd., Suite 204            Office:   540-658-2720 x1407
Lorton, VA 22079-2630                      Mobile: 757-508-6208
address@hidden<mailto:address@hidden>                            Fax:     

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