Atomic-Time

2021 ◽  
pp. 82-102
Keyword(s):  
2020 ◽  
pp. 35-38
Author(s):  
S.I. Donchenko ◽  
I.Y. Blinov ◽  
I.B. Norets ◽  
Y.F. Smirnov ◽  
A.A. Belyaev ◽  
...  

The latest changes in the algorithm for the formation of the international atomic time scale TAI are reported in terms of estimating the weights of the clocks involved in the formation of TAI. Studies of the characteristics of the long-term instability of new-generation hydrogen masers based on processing the results of the clock frequency difference with respect to TAI are performed. It has been confirmed that at present, new-generation hydrogen masers show significantly less long-term instability in comparison with quantum frequency standards ofsimilar and other types.


2017 ◽  
Vol 65 (5-6) ◽  
pp. 585-591 ◽  
Author(s):  
Charles F. A. Baynham ◽  
Rachel M. Godun ◽  
Jonathan M. Jones ◽  
Steven A. King ◽  
Peter B. R. Nisbet-Jones ◽  
...  

Metrologia ◽  
1969 ◽  
Vol 5 (3) ◽  
pp. 73-76 ◽  
Author(s):  
A G Mungall ◽  
H Daams ◽  
R Bailey

1972 ◽  
Vol 47 ◽  
pp. 395-401
Author(s):  
L. V. Morrison

Analyses of occultation timings show that periodic correction terms with semi-amplitude as great as 0.″18 arise from corrections required to the empirical constants of the Brown/Eckert theory. Using the atomic time-scale, some of the occultation data have been used to determine a correction of – 30 ± 16″/cy2 to Spencer Jones' value for the secular acceleration of the Moon. In the light of this correction, and previous determinations, attention is drawn to the possible weakness of Spencer Jones' value, which is not reflected in his quoted error of ± 1″/cy2. Further analyses of 50000 occultations observed since 1943 promise to reveal more accurately-determined corrections.


Gold pointed out in 1967 that as some quasars have components smaller than 0.01, radio interferometers might allow distances on Earth of the order of 104 km to be measured to a precision of a few centimetres. He envisaged radio interferometers employing video tape recorders and atomic time standards. The difficulties and probable costs of such measurements are reviewed.


1963 ◽  
Vol 51 (3) ◽  
pp. 498-499 ◽  
Author(s):  
J. Newman ◽  
L. Fey ◽  
W.R. Atkinson
Keyword(s):  

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