AC

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Related to atomic clock: Doomsday Clock
AcronymDefinition
ACAdult Contemporary (radio format)
ACArea Code
ACAlternating Current (electricity; physics)
ACAuthor's Correction
ACAnte Cibum (Latin: Before Meals)
ACAir Conditioning/Conditioner
ACAccess Card
ACAtlantic City
ACAlice Cooper (musician)
ACAccess Control
ACAir Canada (airline code)
ACAnnual Conference (Church of the Brethren)
ACAll Clear
ACAmerican College
ACAssociated Content (Yahoo)
ACAdvisory Circular (aviation)
ACAudio Codec
ACAthletic Club
ACApple Computer
ACAcademic Institution (DNS zone for UK academic institutions; as in .ac.uk)
ACAce Combat (video games 1-5)
ACAccept (ITU-T)
ACAircraft
ACAdvisory Committee
ACAdvanced Computing
ACAir Compressor
ACAge Concern (UK)
ACAnderson Cooper (news correspondent)
ACAnimal Control
ACAntigua
ACAutoCAD
ACActual Cost
ACAnimal Crossing (video game)
ACAdvent Children (movie sequel to Final Fantasy VII game)
ACAcceptance Criteria
ACAverage Cost
ACAfter Coupon
ACAutomobile Club
ACAssociazione Calcio (Italian: soccer club)
ACAberdeen College
ACAtomic Clock
ACAccount Code (Sprint BCS-29)
ACAssistant Coach
ACArmored Core (video game)
ACAccount Current
ACAdapter Card (FS-1037c)
ACAir-Cooled
ACAcute
ACAnalytical Chemistry
ACActive Component
ACAustralian Capital Territory
ACAfrican Caribbean
ACArmy Corps
ACAmherst College
ACAuxiliary Contact
ACAcceleration (Front Page Sports Football '95 et al)
ACAir Cargo
ACAcre (state of Brazil)
ACAuthentication Code (telecommunications)
ACAssassin's Creed (videogame)
ACAir Carrier
ACAircraft Carrier
ACAachen (Germany)
ACAccountancy
ACArm Chair
ACAnonymous Coward (Slashdot)
ACAxiom of Choice (math)
ACAir Combat (game)
ACAscension Island (top level domain)
ACAlameda County
ACAssembly Complete
ACAlan Cox (Linux kernel hacker)
ACAtmospheric Chemistry
ACAccess Category
ACArc Consistency (constraint programming AI research)
ACAllis Chalmers (manufacturer of agriculture and industrial equipment)
ACAsheron's Call (game)
ACAccounting Clerk
ACArea of Concern (school grading system)
ACAdjacent Channel
ACAssessment Center
ACAsphalt Concrete
ACAir Corps
ACApplication Context
ACAnterior Chamber
ACActivated Charcoal
ACAdjudicator
ACAccount Control
ACAsociación Civil (Spanish: Civil Partnership)
ACArithmetic Coding
ACAssociation for Coaching (London, UK)
ACApplied Cryptography (book)
ACAdministrative Control
ACAction Code
ACAir Controller
ACAccess Channel
ACAero Club
ACActinium
ACAction for Change (Mauretania)
ACAir Curtain
ACAppeals Council (Social Security)
ACAutocheck
ACApple Cider
ACAnalog Computer
ACAudit Commission (UK)
ACAir Traffic Controller (USN Rating)
ACAir Change
ACAcoustic Coupler
ACAbdominal Circumference (obstetrics)
ACAleister Crowley (novelist)
ACAssistant Commissioner
ACAllied Command
ACAutonomic Computing
ACAngelina College
ACAdenylate Cyclase
ACAffinity Chromatography
ACAnglican Communion
ACAircraft Commander
ACAquatic Center
ACAlpha Centauri (game)
ACAfter Class
ACAsphalt Cement
ACAcademic Complex
ACAdvent Christian
ACAlgorithmic Complexity
ACAnthrocon (anthropomorphics convention)
ACAdvocacy Center
ACAuto Clicker (gaming)
ACAcromioclavicular (shoulder joint)
ACAssociation Class
ACAlignment Check
ACAssistant Camera (film production)
ACAnderson College (South Carolina)
ACAlbion College (Albion, MI)
ACAnti Christ
ACArea Coordinator
ACArmor Class
ACAlcohol Concentration
ACAkademikernes Centralorganisation
ACAndersen Consulting
ACArchival Collection
ACAugustana College (ELCA college, Sioux Falls, SD)
ACArmored Cable (electricity)
ACAdvanced CMos
ACAbsorption Chiller
ACAsbestos Cement
ACAltocumulus (cloud formation)
ACAmount Claimed
ACAir Commodore
ACAgir Ensemble Contre le Chômage (Paris, France)
ACAllergic Conjunctivitis
ACAfter Christ
ACAsphalt Content
ACAntecubital
ACAcetyl Group (chemistry)
ACAssist Control (ventilation)
ACAutomatic Computer
ACAsotin County (Washington)
ACAlicyclic
ACAmphibious Corps (US DoD)
ACAutocannon
ACActual Count
ACAutomation Company
ACAuto Carrier (chassis supplier of original Cobra roadster)
ACAdmirals Club
ACAsynchronous Communications
ACAir Cadets
ACAttenuation Correction
ACAir Conduction
ACAntioch College (Yellow Springs, OH)
ACAnthony Carter (ex-NFL player)
ACAlternative Certification (teaching)
ACAuxiliary Circuit
ACAppeal Cases
ACAssociate Commissioner
ACArc Cutting
ACAcquisition Center
ACAccess Customer
ACAcción Ciudadana (Spanish: citizen action; Guatemala)
ACAnno Christi (Latin: In the Year of Christ; epigraphy)
ACAdvanced Catalyst (research team; Japan)
ACArea Commander
ACAgent Code
ACAircraftman
ACAylesbury College (Aylesbury, Buckinghamshire, UK)
ACAssistant Chef
ACArret Cardiaque
ACAfter Colony
ACAfter Colony (Gundam Wing animated series)
ACAttribute Certificate
ACAdded Copy (libraries)
ACAsbury College (Kentucky, USA)
ACAssociation Control
ACAmbassador College
ACAdoptionscentrum (Sweden)
ACAscension Islands (ISO country code)
ACAngel Crew (band)
ACAirspace Control
ACAdvance Construction
ACAnte Christum (Latin: Before Christ)
ACAtlas Centaur (US intermediate class expendable launch vehicle)
ACAstrographic Catalogue
ACAuthentication Center
ACArmy Component
ACAppellation Contrôlée (beverages)
ACAmerican Choppers (TV series)
ACAttachment Circuit
ACAntenna Controller
ACAccess Concentrators
ACAdvanced Challenge (activity, Camp Yawgoog, BSA)
ACApelação Cível (Civil Appeal; Brazil)
ACAcid Ceramidase
ACAdams Central (High School; Hastings, NE)
ACAutomatic Callback (Bellcore)
ACAnonymous Caller
ACAviation Challenge
ACAuto-Cannon (gaming, Mechwarrior)
ACAerodynamic Center
ACAdriamycin and Cytoxan (chemotherapy protocol)
ACAviation Cadet
ACAdministrative Complex
ACAiming Circle (field artillery aiming instrument)
ACAnalysis Console
ACAssociativity and Commutativity (math)
ACAelod Cynulliad (Welsh: Member of the National Assembly for Wales)
ACAvanti Cristo (Italian: Before Christ)
ACArea Commissioner (UK scouting)
ACActual Commitment
ACAmbient Computing (Workshop)
ACAcquisition Category
ACAssociate Contractor
ACAttack Center
ACAryan Circle (gang)
ACAgent Cost (Sprint)
ACAnswer Complete
ACAddictions Counselor (New Life Ministries)
ACActive Counter
ACAnarchist's Cookbook
ACArmoured Core (game)
ACAustin Croshere (NBA player)
ACAutomatic Correlation
ACAbsolute Ceiling
ACActive Classroom (education)
ACAdjustment Center (prisons)
ACAktivacní Centrum (Czech: Activation Center)
ACAerocasillas SA
ACApollo's Chariot (Busch Gardens roller coaster)
ACAnthony Consulting (Yorktown, VA)
ACAlternate Call (listing)
ACAuthorized Consultants
ACAccountability Measurement
ACAromatherapy Council
ACAir Controlman
ACAir Coordinator
ACAshbury College (Canada)
ACApplication Control Architecture
ACAtmospheric Corrector
ACAwaiting Connection
ACAffinitätschromatographie (German)
ACAffirmative Constructive (debate)
ACAirframe Change
ACAcademia Cotopaxi (Quito, Ecuador)
ACAnte Cenam (Latin: Before a Meal)
ACAltai Consulting
ACAuscultacion Cardiaca (Spanish: Cardiac Auscultation)
ACAssessment Counselor (New Life Ministries)
ACAssociazione Calcistica (Italian: Soccer Association)
ACAcknowledged Connectionless
ACAssigned Capital
ACAutistics and Cousins
ACAmbush At Corellia (Star Wars novel)
ACAberración Cromosómica (Spanish)
ACAnthony Calhoun (sports anchorman)
ACAuthorised Certified (seed)
ACApostolic Carmel (Catholic congregation)
ACArea Correlator
ACAnalyst Console
ACAfter Crowning (Dungeons & Dragons)
ACAgro Centro (Guatemala)
ACAllied Chat (gaming)
ACAsh Catchem (Pokémon protagonist)
ACAbstinence Committed
ACArmament Computer
ACAlimbic Cluster (Metroid Prime Hunters video game)
ACAncho Canyon
ACARTS Controller
ACAnte de Cristo (Spanish: Before Christ)
ACAssumption Iloilo
ACAttack Console
ACAttack Cargo Plane (military aircraft designation, as in AC-130)
ACAntennal Commissure
ACAtheist Crew
ACAutocars and Accessories Ltd.
ACAuxilio Ciudadano (Spanish, special police & military task force)
ACAfter Catch Yards (yards gained after catching a pass, football)
ACAllen Cowlings (OJ Simpson trial)
ACAWP Control
ACAction Chit
ACAperture Card Sil Negative
ACActive Commanding
References in periodicals archive ?
"The goal of the space experiment is to put the Deep Space Atomic Clock in the context of an operating spacecraft complete with the things that affect the stability and accuracy of a clock and see if it performs at the level we think it will: with orders of magnitude more stability than existing space clocks," said Todd Ely, a space navigator and the principal investigator of the project.
Atomic clocks are used to measure the distance between objects by timing how long it takes a signal from one point to the other.
Sources close to ISRO, on the condition of anonymity, told IANS that two more atomic clocks in the satellite system started showing abnormalities thereby taking the total number of failed clocks to five.
However, because their resonance frequencies were so high, it was obvious that an atomic clock, even with a broad linewidth, would have a much higher Q than any previous clock and would therefore have a potentially huge advantage in both accuracy and stability.
That's one cool science experiment, and an atomic clock is useful for many business and scientific applications.
The new quality makes the atomic clock makes it about three times as accurate as NIST-F1, which has served as the standard since 1999.
That's better than a wristwatch but about a hundred millionth as precise as today's best atomic clocks, which count the frequency of light emissions from an atom as its electrons release small bursts of energy.
An atomic clock consists of gas atoms trapped in a magnetic field and cooled almost to absolute zero, or minus 273 Celsius, the coldest temperature permitted by the laws of physics.
This deceleration causes the Earth's rotational time to slow with respect to the atomic clock time.
Researchers at Germany's national metrology institute, Physikalisch-Technische Bundesanstalt (PTB), have also achieved success with their strontium-based optical atomic clock. Both the JILA and PTB methods use laser beams to capture strontium atoms that are supercooled and held for measurement.
National Institute of Standards and Technology (NIST) in Boulder, CO, operates the NIST-F1 Cs atomic clock that serves as the primary time and frequency standard for the U.S., and contributes to the international group of atomic clocks that define coordinated universal time (UTC), the timing belt for the planet earth.
The Wave Ceptor's magic ingredient is atomic timekeeping which ensures perfect timing via radio signals, it automatically receives the time and date from both the BT radio transmitter at Rugby (controlled by the National' Physical Laboratory's atomic clock) I and from Mainflingen Germany, which I both have transmission ranges of 900 miles each enabling the watch to self-adjust for summer and winter in the UK and automatically adjust to central European time - time can also be set manually if required.