This summer, somewhat coincidentally, I got to take a tour of some of the NIST Time and Frequency Division, rode my motorcycle up to Fort Collins to see the WWVB antennas, and attended the NIST 43rd Annual Time & Frequency Seminar. I wrote a couple of blog articles with my notes and photographs. Could be someone here will find these interesting. https://coverclock.blogspot.com/2018/05/time-is-precious.html https://coverclock.blogspot.com/2018/06/wibbley-wobbley-timey-wimey.html -- J. L. Sloan Digital Aggregates Corp. +1 303 940 9064 (O) 3440 Youngfield St. #209 +1 303 489 5178 (M) Wheat Ridge CO 80033 USA jsloan@diag.com http://www.diag.com <http://www.diag.com/>