National Research Council, Division on Engineering and's An Assessment of Precision Time and Time Interval Science PDF

By National Research Council, Division on Engineering and Physical Sciences, Naval Studies Board, Committee for an Assessment of Precision Time and Time Interval Science and Technology

ISBN-10: 0309085225

ISBN-13: 9780309085229

Committee for an overview of Precision Time and Time period technology and know-how, nationwide examine Council, department on Engineering and actual Sciences, Naval reports Board

Knowledge of time is vital to specific wisdom of position, and for that reason the military, with its have to navigate at the excessive seas, has traditionally performed a huge function within the improvement and alertness of complex time recognition and dissemination applied sciences. Discoveries coming from simple study funded by way of the place of work of Naval learn (ONR) lie on the center of brand new optimum functionality atomic clocks, Naval examine Laboratory (NRL) services performed a task in constructing the space-qualified atomic clocks that let the worldwide Positioning method (GPS), and the U.S. Naval Observatory (USNO) continues and disseminates the normal of time for all the division of protection (DOD). The military has made significant investments in so much features of precision time and time period (PTTI) technology and know-how, even though particular PTTI-related examine has additionally been funded by means of the protection complicated learn initiatives business enterprise (DARPA) and non-DOD firms comparable to the nationwide technological know-how starting place (NSF), the nationwide Aeronautics and house management (NASA), and the dep. of trade. army investment, mostly via ONR, has a background of being an early enabler of key new advancements. really appropriate investment judgements by way of the Navy-particularly through ONR software officers-have underpinned many of the significant advances in PTTI technology and know-how (S&T) within the final 50 years.

PTTI is critical to fashionable naval wishes, and certainly to all of the armed companies, to be used in either navigation and communications. distinctive time synchronization is required to successfully make sure the beginning of a code series in safe communications, to accomplish navigation, and to find the placement of sign emitters. distinctive frequency regulate is needed in communications for spectrum usage and frequency-hopped spread-spectrum suggestions. there are numerous examples of crucial army operations that rely on PTTI and will make the most of advancements in PTTI know-how. those contain:

-GPS clocks and self reliant operations,

-Weapon process 4-dimensional coordination,

-GPS antijamming,

-Network-centric battle, and

-Secure army communications.

This file summarizes that mark downs within the dimension, weight, and tool requisites and raises within the ruggedness of PTTI units with out sacrificing functionality might positioned extra exact and distinct timekeeping within the fingers of the warrior, bettering features in the entire above operations.

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Committee for an evaluation of Precision Time and Time period technology and know-how, nationwide examine Council, department on Engineering and actual Sciences, Naval reports Board

Knowledge of time is key to specific wisdom of place, and therefore the military, with its have to navigate at the excessive seas, has traditionally performed a huge function within the improvement and alertness of complicated time awareness and dissemination applied sciences. Discoveries coming from uncomplicated study funded via the workplace of Naval study (ONR) lie on the center of trendy optimum functionality atomic clocks, Naval study Laboratory (NRL) services performed a job in constructing the space-qualified atomic clocks that let the worldwide Positioning process (GPS), and the U. S. Naval Observatory (USNO) keeps and disseminates the normal of time for all the division of safeguard (DOD). The army has made significant investments in such a lot facets of precision time and time period (PTTI) technology and know-how, even if particular PTTI-related study has additionally been funded via the security complicated examine tasks organisation (DARPA) and non-DOD companies similar to the nationwide technological know-how origin (NSF), the nationwide Aeronautics and area management (NASA), and the dep. of trade. army investment, mostly via ONR, has a heritage of being an early enabler of key new advancements. sensible investment judgements via the Navy-particularly via ONR application officers-have underpinned many of the significant advances in PTTI technology and expertise (S&T) within the final 50 years. PTTI is necessary to trendy naval wishes, and certainly to the entire armed providers, to be used in either navigation and communications. particular time synchronization is required to successfully ensure the beginning of a code series in safe communications, to accomplish navigation, and to find the placement of sign emitters. distinctive frequency keep an eye on is needed in communications for spectrum usage and frequency-hopped spread-spectrum innovations. there are various examples of crucial army operations that depend upon PTTI and will make the most of advancements in PTTI know-how. those comprise: -GPS clocks and self sustaining operations, -Weapon approach 4-dimensional coordination, -GPS antijamming, -Network-centric war, and -Secure army communications. This record summarizes that discounts within the measurement, weight, and gear requisites and raises within the ruggedness of PTTI units with no sacrificing functionality may positioned extra actual and targeted timekeeping within the palms of the warrior, enhancing services in all the above operations.

Extra resources for An Assessment of Precision Time and Time Interval Science and Technology

Sample text

Although proportionately a smaller contributor in FY 02 to the overall area of AMO physics research, Navy resources, provided through ONR, have paid excellent dividends by enabling advances of great relevance to PTTI, including investigations into the cooling and trapping of atoms, the development of atomic fountain frequency standards, and, more recently, Bose-Einstein condensation. 1 support of basic research is significant for advancing the cutting edge of knowledge, as the prior successes of such research have shown.

Air Force, GPS Joint Program Office, Los Angeles Air Force Base, Calif. S. Air Force, Schriever Air Force Base, Colo. S. Naval Observatory, Alternate Master Clock, Schriever Air Force Base, Colo. S. C. S. C. University of Colorado, Boulder, Colo. University of Delaware, Newark Welkin/CSC, Chantilly, Va. Zeta Associates, Fairfax, Va. , Anaheim, Calif. S. institutions. -based contributions have gone from 61 percent of the total papers to 37 percent. Changes in some specific categories are particularly revealing.

Theoretical studies addressing this issue have been pursued, and a potential experimental realization, so-called spin squeezing, has been demonstrated by researchers at NIST. Device size and power consumption are as important to many PTTI applications as are stability and accuracy. Recent developments in AMO physics may also contribute here. The coherent population trapping (CPT) clock represents a new class of atomic clock having an inherent simplicity that renders it particularly suitable for applications where size and the power consumption bear a premium.

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An Assessment of Precision Time and Time Interval Science and Technology by National Research Council, Division on Engineering and Physical Sciences, Naval Studies Board, Committee for an Assessment of Precision Time and Time Interval Science and Technology


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