[time-nuts] GPS Signal Strength Through Roof?

bg at lysator.liu.se bg at lysator.liu.se
Mon Mar 19 22:34:39 EDT 2007


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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