[time-nuts] GPS Signal Strength Through Roof?

Rob Kimberley rk at timing-consultants.com
Tue Mar 20 06:22:02 EDT 2007


 There is an old English saying -  "the proof of the pudding is in the
eating"....

:-)

Rob

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of bg at lysator.liu.se
Sent: 20 March 2007 02:35
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] GPS Signal Strength Through Roof?

Jason & Rob,

When using suboptimal antenna siting, do not expect stellar GPS performance.
Tracking satellites is good, but it says nothing about how bad multipath
environment your antenna/receiver is subjected to.

--

   Björn

On Mon, March 19, 2007 19:12, Rob Kimberley said:
> Jason,
>
> I'm using 4 VIC-100s inside, under a flat concrete roof in my single 
> story office. Tracking 8 satellites on each receiver module on both my 
> CommSync units. Each one connected to Rx via a coiled up 50 ft length of
RG-59.
>
> Yours should work OK. What cable and what length are you planning on 
> using?
>
> Temp specs on my antennae are -40 to +85C operating which is typical 
> for this type of product. Don't think it gets that hot in Houston!!
>
> Cheers
>
> Rob K
>
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] 
> On Behalf Of Jason Rabel
> Sent: 19 March 2007 17:56
> To: 'Discussion of precise time and frequency measurement'
> Subject: [time-nuts] GPS Signal Strength Through Roof?
>
> I was planning on mounting one of those Lucent 26dB antennas in my 
> attic, and was wondering what the signal strength would be like 
> through the asphalt shingles. If I do that then it's just pretty much 
> a straight drop down the wall into the computer room. Would that work 
> (have acceptable signal strength and be able to track multiple 
> satellites), or should I just suck it up and mount it outside?
>
> I guess another thing I should look at is the temp specs, since attics 
> get pretty hot down here in Houston during the summer.
>
> Jason
>
>
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