Time and Frequency Activities at the U.S. Naval Observatory
Figure 4
Observed error in NTP Time transfer between
USNO-DC and USNO-AMC. Blue plot shows
.1-day averages when the 10% of the data exceeding .4 milliseconds error are removed. Red dots are simple .1-day averages of all
the data, of which 5% exceed .5 milliseconds deviation.