When your measuring, just make sure you don't get a gnat with haemorrhoids, it can amount to a mound of a difference.
73, Steve 2009/8/20 Lux, Jim (337C) <james.p....@jpl.nasa.gov>: >> -----Original Message----- >> From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On >> Behalf Of Mark Sims >> Sent: Wednesday, August 19, 2009 8:56 AM >> To: time-nuts@febo.com >> Subject: [time-nuts] Accurate 1 pps signals >> >> Know where the heck you are down to a gnats ass and get that location >> into the unit with full accuracy. Errors in the saved antenna >> position from its true position have a definite effect on the quality >> of the output. Ideally have the antenna location surveyed in WGS84 >> coordinates. >> > > > OK.. just what is a gnat's ass in actual SI units? > > It's small.. > Is it a standardized unit drawn from physiology (like the yard or foot, > relative to King John's physical dimensions, or the cubit) > Is it a traditional term for some other standard unit (e.g. a "barn" being > 1E-24 cm^2 or a shake being 1E-8, both being from early nuclear weapons > development, and essentially a rounded value for some useful size: > cross-section for a nuclear reaction, and generation time for fission, > respectively) (I understand from some casual googling that the gnat's ass is > used by machinists to refer to a tenthousandth of an inch/tenth of a mil, > although none of the machininsts I know use the term. They talk in tenths > when being quantitative, and have somewhat earthier terms when talking > qualitative) > > What I did find with google was interesting.. I didn't know that gnat's ass > as a term for very small dated at least back to Aristophanes, although the > lines 160-164 in Clouds are still qualitative, not quantitative (narrow, > thin/subtle: stenos, leptos) > > Next up, we need to decide which species of gnat is being referred to.. > > _______________________________________________ > 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. > -- Steve Rooke - ZL3TUV & G8KVD A man with one clock knows what time it is; A man with two clocks is never quite sure. _______________________________________________ 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.
