[time-nuts] Substitute GPS in a Z3801A

Robert Benward rbenward at verizon.net
Fri Jun 25 13:15:44 UTC 2010

OK, I'll give you that.  But, how does it account for the rapid change in 
slope, or the abrupt change for that matter?  It doesn't look like an aging 
crstal to me (maybe one with a problem that jumps in freq).  For the most 
part, there is no jumping DURING the slope, it seems to change on the 
boundries.  Would not switching satellites account for that?


----- Original Message ----- 
From: "Hal Murray" <hmurray at megapathdsl.net>
To: "Discussion of precise time and frequency measurement" 
<time-nuts at febo.com>
Sent: Thursday, June 24, 2010 5:40 PM
Subject: Re: [time-nuts] Substitute GPS in a Z3801A

>> Is it possible the phase shift is caused by the doppler of the satellite?
> Not likely.  Everything in this area is explained by the GPS receiver 
> having
> a local crystal that isn't locked to a reference.
> See Tom's heater experiment:
>    http://www.leapsecond.com/pages/vp/heater.htm
> -- 
> These are my opinions, not necessarily my employer's.  I hate spam.
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