If that is not time-nutty, I do not know what will :) On Jun 20, 2017 7:04 AM, "jimlux" <jim...@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 > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/m > ailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.