[time-nuts] Mounting GPS Antenna on Steel Roof

[Rob Kimberley]

Matthew,

You mentioned Time Server..is this your only GPS or do you have other more
accurate timing requirements? Unless you are working on nanosecond type
accuracy, I don't see that mounting your antenna on the metal roof is going
to cause you any practical problems. If all you are interested in is taking
time from your GPS over Ethernet using NTP, then all will work fine.

Rob Kimberley

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Matthew Smith
Sent: 04 March 2008 09:36
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Mounting GPS Antenna on Steel Roof

Quoth Rob Kimberley at 2008-03-04 19:29...
> Height of antenna is not important, but being clear of obstructions and
> large metallic objects are. Can you mount it on a pole at the end of the
> garden? 

I can, but the end of the garden is some 50 metres from the house, which
brings back my concern of excessive cable lengths.

We're in a bit of a weird situation - it's a rural location, but there
are sheds, water tanks and all sorts dotted around and cables can only
really be run along (steel) fences as vehicular access is required all
around.  (Think of a farm and you wouldn't be far off.)

I had thought about putting the time server in the big shed and running
an underground Ethernet cable (this is a fairly reasonable proposition)
until the reflection issue came up - the shed (also steel) has a North
to South roof, so the problem would be even worse.

Cheers

M

-- 
Matthew Smith
Smiffytech - Technology Consulting & Web Application Development
Business: http://www.smiffytech.com/
Personal: http://www.smiffysplace.com/
LinkedIn: http://www.linkedin.com/in/smiffy

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