[time-nuts] Space-borne frequency comb metrology
brooke at pacific.net
Mon Nov 28 16:56:07 EST 2016
Free on line pdf at:
"Precision time references in space are of major importance to satellite-based fundamental science, global satellite
navigation, earth observation, and satellite formation flying. Here we report on the operation of a compact, rugged, and
automated optical frequency comb setup on a sounding rocket in space under microgravity. The experiment compared two
clocks, one based on the optical D2transition in Rb, and another on hyperfine splitting in Cs. This represents the first
frequency comb based optical clock operation in space, which is an important milestone for future satellite-based
precision metrology. Based on the approach demonstrated here, future space-based precision metrology can be improved by
orders of magnitude when referencing to state-of-the-art optical clock transitions."
The lesser of evils is still evil.
More information about the time-nuts