[time-nuts] Precise positions for GPSDOs
mc235960 at gmail.com
Thu May 2 11:34:46 EDT 2013
I have a worse than optimal antenna location for my t-bolt and that just choked on being fed the google earth location which is 7.5 meters away.
Le 2 mai 2013 à 14:22, Poul-Henning Kamp a écrit :
> In message <CAPXiX5ricf=Ea0B=C2yR8iX+70SRtfJ9jeuTkgUQEhh5iZbN1A at mail.gmail.com>, Stewart Cobb writes:
>> The next best idea is to locate your antenna on Google Maps. [...]
> If your GPSDO's self-survey isn't better than the registration of
> Google Maps, you have different problems.
> In particular, be aware that the GPSDO does not need to know the
> antennas _actual_ position, it needs the _apperant_ position, which
> takes the reflection environment into account. (GW: "fresnel zone")
> This is a much better strategy:
> 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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