[AusNOG] GPS Issues with Microwave Radio Equipment

[Craig Meyers]

There was an article on New Scientist last month about reliability of
GPS as a number of the satellites are past their "used-by-dates":

 

http://www.newscientist.com/article/mg20227085.700-ageing-satellites-put
-gps-at-risk.html

 

I don't think that would be your problem though, the dates mentioned are
2011-2012.

 

-- Craig Meyers

 

-----Original Message-----
From: ausnog-bounces at lists.ausnog.net
[mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Patrick Wu
Sent: Wednesday, 17 June 2009 5:50 PM
To: ausnog at ausnog.net
Subject: [AusNOG] GPS Issues with Microwave Radio Equipment

 

Hi All,

 

We have recently experienced some GPS synchronisation errors with some
of our microwave radios in the Sydney area. [The GPS feature is used on
some TDD radios to synchronise them so that they transmit at the same
time which allows for co-location of multiple radios on overlapping
frequencies]. 

 

Our understanding is that the GPS units receive satellite signals at
around 1500MHz which would not typically be impacted by weather. Further
the microwave links themselves operating on much higher frequencies are
not showing any adverse impact from the recent weather so we are
suspecting some other possible source causing the GPS issue.

 

Has anyone else seen any unusual GPS errors and/or activity with any GPS
equipment of late?

 

cheers,

 

Patrick Wu

BigAir Group Ltd

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