Robert Rolf wrote:
> http://www.boulder.nist.gov/timefreq/stations/wwvbcoverage.htm
> cleary shows that the coverage area varies with time of day.
> " Note that the coverage area contracts during daylight hours
> and expands during nighttime hours."

Note that Massachusetts is right on the edge of just about all the plots.
However regardless of what the computer models think should happen, I can
tell you from experience that WWVB clocks around here only seem to
synchronize at night.


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