[time-nuts] GPS Antenna on Tower.
michaeljwouters at gmail.com
Tue Jun 20 08:51:35 EDT 2017
Try again ...,
Since 1cm of motion is equivalent to 30 ps, there's probably not much point
in putting your GNSS antenna on a geodetic monument if all you care about
is timing. But it does matter if you're trying to track continental drift.
On Tue, 20 Jun 2017 at 10:44 pm, Michael Wouters <michaeljwouters at gmail.com>
> 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
>> > 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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