[time-nuts] Pioneering Deep-Space Atomic Clock Taking Flight This Month

jimlux jimlux at earthlink.net
Thu Jun 6 21:44:15 UTC 2019


On 6/6/19 12:36 PM, JULIAN TOPOLSKI wrote:
> Interesting article but no description of the clock.
> 
> https://www.space.com/nasa-atomic-clock-falcon-heavy-launch.html?utm_source=twitter&utm_medium=social&utm_campaign=dlvr.it
> _______________________________________________

It's DSAC..

https://en.wikipedia.org/wiki/Deep_Space_Atomic_Clock

an order of magnitude better than a space Rb
an order of magnitude better than a Cassini USO at 1000 second tau




https://ieeexplore.ieee.org/abstract/document/7437483
R. L. Tjoelker et al., "Mercury Ion Clock for a NASA Technology 
Demonstration Mission," in IEEE Transactions on Ultrasonics, 
Ferroelectrics, and Frequency Control, vol. 63, no. 7, pp. 1034-1043, 
July 2016.
doi: 10.1109/TUFFC.2016.2543738


https://ieeexplore.ieee.org/document/8304787
IEEE Trans Ultrason Ferroelectr Freq Control. 2018 Jun;65(6):950-961. 
doi: 10.1109/TUFFC.2018.2808269.
Using the Deep Space Atomic Clock for Navigation and Science.
Ely TA, Burt EA, Prestage JD, Seubert JM, Tjoelker RL.
Abstract
Routine use of one-way radiometric tracking for deep space navigation 
and radio science is not possible today because spacecraft frequency and 
time references that use state-of-the-art ultrastable oscillators 
introduce errors from their intrinsic drift and instability on 
timescales past 100 s. The Deep Space Atomic Clock (DSAC), currently 
under development as a NASA Technology Demonstration Mission, is an 
advanced prototype of a space-flight suitable, mercury-ion atomic clock 
that can provide an unprecedented frequency and time stability in a 
space-qualified clock. Indeed, the ground-based results of the DSAC 
space demonstration unit have already achieved an Allan deviation of 
2E-15 at one day; space performance on this order will enable the use of 
one-way radiometric signals for deep space navigation and radio science.


http://issfd.org/ISSFD_2012/ISSFD23_OD1_2.pdf







More information about the Time-nuts_lists.febo.com mailing list