[AusNOG] GPS timesource

Greg mclennan at internode.on.net
Thu Jan 28 10:42:04 EST 2016


I use a KT2000 GPS SNTP Timeserver(<$500) at work for a core router.. 
KT2000pdf. 
<http://www.masterclocksystems.com.au/documents/brochures/clock_systems/KT2000_GPS_SNTP_Timeserver.pdf> 

I know there are way better units on the market, but bang for buck for 
reasonable time accuracy it does the job.

 From a hobbyist's perspective. I'v been toying with  the idea to 
utilize an Arduno board with a GPS & Network shield and write or adapt 
some S/NTP code.. Should be do-able for around $100(less on ebay!), but 
time and effort on the code will be the painful bit..

https://www.arduino.cc/en/Main/ArduinoBoardUno
https://www.arduino.cc/en/Main/ArduinoEthernetShield
https://www.adafruit.com/products/1272

and end up with something that may look like : 
http://files.hwkitchen.com/200000066-820df8307f/GSM%20Playground%20-%20stackable.jpg


Regards
Greg

On 28/01/2016 9:10 AM, Paul Gear wrote:
> On 27/01/16 12:33, KIRN Paul (Powerlink) wrote:
>> Hi All,
>> As reported on Slashdot there have been observances of GPS time error in the last 24 hrs (during Australia Day holiday here). With reports from of a 13.7usec step change -  possibly coincidental with the decommissioning of GPS satellite SVN23 (PRN32) on 25-1-15 or other issues to with UTC correction parameters.
>> http://it.slashdot.org/story/16/01/26/1735223/discrepancy-detected-in-gps-time
>> https://www.febo.com/pipermail/time-nuts/2016-January/095692.html
>> http://www.navcen.uscg.gov/?Do=gpsShowNanu&num=2016008
>>
>> Wondering if any noggers have seen any alarms on your GPS receiver time sources in the last 24 hours?
> As an adjunct question, what sort of hardware are you using for your NTP
> stratum 1 sources (GPS, atomic, whatever), and are there any which are
> in the affordable range for the hobbyist?
>
> Paul
>
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