[time-nuts] Allan Deviation -> more data: GPS 1PPS againstOCXO/128

[Rob Kimberley]

Most timing receivers I've worked with usually mask out anything below about
10 - 15 degrees. Minimises multi-path and tropo effects. 

Seem to remember having to tweak a Datum unit several years ago on an
installation due to a large metal cooling tower at 20+ degrees above our
antenna site.

Rob K  

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Poul-Henning Kamp
Sent: 28 October 2006 20:53
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Allan Deviation -> more data: GPS 1PPS
againstOCXO/128

In message <20061028.214431.-1639909192.cfmd at bredband.net>, Magnus Danielson
wr
ites:

>Anyone done this? Experience to share? I just haven't had the time.

I thought about something like that, but after a bit of looking at the data
I just raised the horizon to 20 degrees, the contribution of sats lower than
that was just not worth it.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.

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