Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

A Laser-Cooled Frequency Standard for GPS

Published

Author(s)

Thomas P. Heavner, Stephan E. Barlow, Marc A. Weiss, Neil Ashby, Steven R. Jefferts

Abstract

NIST is in an initial phase of developing a prototype laser-cooled atomic frequency standard (AFS) for potential use in a future GPS system. The expected fractional frequency stability or Allan deviation, ςy(τ), will be 2x10-13 at one second, improving as the square-root of the averaging time to 7x10-16 at one day. This corresponds to an expected time dispersion of 0.060 ns at one day, or 0.02 m of user range error (URE). We discuss design and development process underway at NIST, as well as capabilities enabled by this AFS in GPS.
Proceedings Title
Proceedings of the ION GNSS 2011 Conference
Conference Dates
September 20-23, 2011
Conference Location
Portland, OR
Conference Title
ION GNSS 2011

Keywords

Atomic clock, Cesium, GPS, Laser Cooling

Citation

Heavner, T. , Barlow, S. , Weiss, M. , Ashby, N. and Jefferts, S. (2011), A Laser-Cooled Frequency Standard for GPS, Proceedings of the ION GNSS 2011 Conference, Portland, OR (Accessed February 27, 2024)
Created September 20, 2011, Updated February 19, 2017