[time-nuts] GPS Antenna on Tower.
michaeljwouters at gmail.com
Tue Jun 20 08:44:33 EDT 2017
Since 1cm of motion is equivalent to 30ps, there's probably not
On Tue, 20 Jun 2017 at 10:11 pm, Didier Juges <shalimr9 at gmail.com> wrote:
> If that is not time-nutty, I do not know what will :)
> On Jun 20, 2017 7:04 AM, "jimlux" <jimlux at earthlink.net> wrote:
> > for geodetic measurements, they drill a hole down to bedrock, and run a
> > pipe down to anchor the antenna to the bedrock.
> > "All holes shall be drilled straight enough so that PVC casing can be
> > installed in the top 15.5 ft of each hole, and that the steel pipe can be
> > freely lowered, not forced, for its entire 35 ft length."
> > http://kb.unavco.org/kb/article/deep-drilled-braced-monument
> > -overview-300.html
> > http://www.scign.org/arch/sdb_monument.htm
> > Google for Ken Hudnutt's or Frank Webb's papers
> > or a 3m tall monument for a CORS station
> > http://www.mwrtk.net/support_docs/corsinstallprocedures.pdf
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