C Acronyms and Abbreviations

ACES

atomic clock ensemble in space

AEHF

advanced extremely high frequency

AMO

atomic, molecular, and optical

AMRAAM

advanced medium-range air-to-air missile

BAW

bulk acoustic wave

BEC

Bose-Einstein condensate

C3

command, control, and communications

C3I

command, control, communications, and intelligence

CAD

computer-aided design

CEC

cooperative engagement capability

CPT

coherent population trapping

DARPA

Defense Advanced Research Projects Agency

DDR&E

Director of Defense Research and Engineering

DOD

Department of Defense

DOE

Department of Energy

DOT

Department of Transportation

EFC

electronic frequency control

FDOA

frequency difference of arrival

FEM

finite element model

GPS

Global Positioning System



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OCR for page 72
An Assessment of Precision Time and Time Interval Science and Technology C Acronyms and Abbreviations ACES atomic clock ensemble in space AEHF advanced extremely high frequency AMO atomic, molecular, and optical AMRAAM advanced medium-range air-to-air missile BAW bulk acoustic wave BEC Bose-Einstein condensate C3 command, control, and communications C3I command, control, communications, and intelligence CAD computer-aided design CEC cooperative engagement capability CPT coherent population trapping DARPA Defense Advanced Research Projects Agency DDR&E Director of Defense Research and Engineering DOD Department of Defense DOE Department of Energy DOT Department of Transportation EFC electronic frequency control FDOA frequency difference of arrival FEM finite element model GPS Global Positioning System

OCR for page 72
An Assessment of Precision Time and Time Interval Science and Technology 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&Dresearch and development rmsroot mean square RPV remotely piloted vehicle

OCR for page 72
An Assessment of Precision Time and Time Interval Science and Technology SABER situational beacon and reply (system) SAM self-assembled monolayer S&T science and technology SAWsurface acoustic wave SECNAV Secretary of the Navy SINCGARS single-channel ground and airborne radio system SPAWAR Space and Naval Warfare Systems Command STAR special technology area review TARA technology area review and assessment TCXO temperature-compensated crystal oscillator TDMA time division multiple access TDOA time difference of arrival TWSTT two-way satellite time transfer UEREuser equivalent range error USAFU.S. Air Force USNO U.S. Naval Observatory UTC Coordinated Universal Time VCO voltage-controlled oscillator XO crystal oscillator