[time-nuts] Cs stability

[Magnus Danielson]

From: "Tom Van Baak" <tvb at LeapSecond.com>
Subject: Re: [time-nuts] Cs stability
Date: Tue, 17 Jul 2007 00:21:37 -0700
Message-ID: <003101c7c843$1d5fcc50$0300a8c0 at pc52>

> ); SAEximRunCond expanded to false
> Errors-To: time-nuts-bounces+magnus=rubidium.dyndns.org+magnus=rubidium.dyndns.org at febo.com
> 
> > I guess that is why some GPS antenna cables is temperature-stabilized as well
> > as the cement-pidestal for the GPS antenna as it stands on solid rock. The same
> > place have controlled environment for the cesiums and hydrogens, together with
> > UPS and disel-engine that kicks in for longer runs.
> > 
> > Or I could be wrong... :)
> 
> Magnus,

Tom,

> This is true (temperature stabilization) for sites that do mm
> level survey and ps level time transfer, using all the tricks
> in the GPS book.
> 
> On the other hand, I think for most of us that play at the
> meter and ns levels with cheap OEM receivers and plastic
> L1 antennas the coax cable temperature issue is quite
> overblown. Or if I'm wrong, show me the data.

I never claimed otherwise. I mearly pointed out that _some_ antennas have that
arrangement among a number of others. Clearly few of us happy amatuers play in
that league. Some of us have GPS receivers and antennas at that level.

Cheers,
Magnus