> I didn't know the Moon tides can change the elevation of LA by 40 cm! Yup, tides in solid rock.
I think it's been mentioned here before, probably more than once. There are two cases that I know about where it really matters: Radio Astronomy If you are doing VLBI, you need to know the position of the antennas accurate to a fraction of a wavelength. CERN They did an experiment that was very very sensitive to the diameter of the ring. The data was much noisier than they expected. Correcting for the phase of the moon cleaned things up. http://en.wikipedia.org/wiki/Earth_tide#Earth_tide_effects http://www.catb.org/~esr/jargon/html/P/phase-of-the-moon.html -- These are my opinions, not necessarily my employer's. I hate spam. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
