IEEE

Institute of Electrical and Electronics Engineers

IFCS

International Frequency Control Symposium

IFF

identification, friend or foe

ISS

International Space Station

JDAM

joint direct-attack munition

JHU/APL

Johns Hopkins University, Applied Physics Laboratory

JILA

Joint Institute for Laboratory Astrophysics

JPL

Jet Propulsion Laboratory

JSTARS

joint surveillance target attack radar system

JTIDS

joint tactical information distribution system

LITS

linear ion trap standard

LLNL

Lawrence Livermore National Laboratory

LO

local oscillator

LORAN

long-range navigation

MCXO

microcomputer-compensated crystal oscillator

MEMS

microelectromechanical system

MILSTAR

military strategic and tactical relay

MMIC

microwave/millimeter-wave monolithic integrated circuit

MOT

magneto-optic trap

NAE

National Academy of Engineering

NAS

National Academy of Sciences

NASA

National Aeronautics and Space Administration

NAVSPASUR

Naval Space Surveillance System

NIST

National Institute of Standards and Technology

NPL

National Physical Laboratory (Great Britain)

NRC

National Research Council

NRL

Naval Research Laboratory

NSF

National Science Foundation

OEO

optoelectronic oscillator

ONR

Office of Naval Research

OPNAV

Office of the Chief of Naval Operations

OXCO

oven-controlled crystal oscillator

PARCS

primary atomic reference clock in space

ppm

parts per million

PTTI

precision time and time interval

RACE

rubidium atomic clock experiment

R&D

research and development

rms

root mean square

RPV

remotely piloted vehicle



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