apolloeme@gmail.com said: > prior to my senior project most geodetic surveyors used a Wooden boxed, > marine chronometer, to get sub second UT1 time, or back then, GMT How did you get the data out of the wooden box? -- These are my opinions. I hate spam.

> Le 13 nov. 2017 à 01:29, Hal Murray <hmurray@megapathdsl.net> a écrit : > > > apolloeme@gmail.com said: >> prior to my senior project most geodetic surveyors used a Wooden boxed, >> marine chronometer, to get sub second UT1 time, or back then, GMT > > How did you get the data out of the wooden box? > I have a couple of marine chronometers that have electrical contacts closing once a second. This signal is relayed by wires to terminals on the outside of the box. One came from a Tashkent astronomical observatory and is Sidereal time rated, the other is a nautical instrument which would probably have been connected to slave clocks. "The power of accurate observation is commonly called cynicism by those who have not got it. » George Bernard Shaw