31 # you should be able to pick up leap-seconds.list from a secondary NIST server. |
31 # you should be able to pick up leap-seconds.list from a secondary NIST server. |
32 # For more about leap-seconds.list, please see |
32 # For more about leap-seconds.list, please see |
33 # The NTP Timescale and Leap Seconds |
33 # The NTP Timescale and Leap Seconds |
34 # http://www.eecis.udel.edu/~mills/leap.html |
34 # http://www.eecis.udel.edu/~mills/leap.html |
35 |
35 |
36 # The International Earth Rotation Service periodically uses leap seconds |
36 # The International Earth Rotation and Reference Systems Service |
37 # to keep UTC to within 0.9 s of UT1 |
37 # periodically uses leap seconds to keep UTC to within 0.9 s of UT1 |
38 # (which measures the true angular orientation of the earth in space); see |
38 # (which measures the true angular orientation of the earth in space); see |
39 # Terry J Quinn, The BIPM and the accurate measure of time, |
39 # Terry J Quinn, The BIPM and the accurate measure of time, |
40 # Proc IEEE 79, 7 (July 1991), 894-905 <http://dx.doi.org/10.1109/5.84965>. |
40 # Proc IEEE 79, 7 (July 1991), 894-905 <http://dx.doi.org/10.1109/5.84965>. |
41 # There were no leap seconds before 1972, because the official mechanism |
41 # There were no leap seconds before 1972, because the official mechanism |
42 # accounting for the discrepancy between atomic time and the earth's rotation |
42 # accounting for the discrepancy between atomic time and the earth's rotation |