Clock Usa Made
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 Digital Thermometer Hygrometer Indoor Outdoor Min Max Memory Huge Dual Display  US $17.97
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 HERTZ GT350H 1966 and 2006 Mustang 10 Inch Wall clock Black Format Rare Classic US $31.95
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 1000 Watt HPS MH Grow Light Air Cool Hood Digital Ballast Hydroponics New US $177.50
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 Art Deco Time Nouveau Clock Black Relief Finish US $45.00
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 Ms Speaking Butler Alarm Clock Reginald Jeeves 126 Orginal messages Stephen Fry US $39.95
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 STAIGER CRYSTAL DESK MANTLE CLOCK MADE IN GERMANY BEAUTIFUL CLOCK US $11.00
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 0095FM Mini Flag Its Always 5 oclock here buffet parrot Spring Summer US $3.24
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 Noahs ark clock US $3.00
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 Shell Wall Clock 13 outside diameter US $79.00
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 New Alice In Wonderland Wall Clock Room Decor US $.99
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 New Tmnt Turtles Wall Clock Room Decor US $.99
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 New Zelda Wall Clock Room Decor US $.99
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 New Beauty And The Beast Wall Clock Room Decor US $.99
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 New Minnie Wall Clock Room Decor US $.99
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 New Shaun The Sheep Wall Clock Room Decor US $.99
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 New Nightmare Before Christmas Wall Clock Room Decor US $.99
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 New Cars Wall Clock Room Decor US $.99
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 New Disney Princesses Wall Clock Room Decor US $.99
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 New Dumbo Wall Clock Room Decor US $.99
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 South Shore Furniture Summertime Collection Bookcase Headboard 39 US $.99
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 7 Color Change LED Digital Thermometer MINI Alarm Clock LCD Calendar DXy JN2 US $.99
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 Howard Miller Chiming Grandfather Clock 610F904 Made in USA US $2,750.00
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 SPARTUS QUARTZ MANTLE SHELF CLOCK NICE CLOCK MADE IN USA US $35.00
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 Cuisinart Brew Central CBC 00 12 Cup Coffee Maker US $53.99
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 50 pre school high grade GRADUATION pin on button party favor GIFT Personalized US $29.99
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 25 pre school high grade GRADUATION pin on button party favor GIFT Personalized US $19.99
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 Jacobs Radial Engine Piston Metallic Aviation Desk Clock from WWII Airplane US $69.99
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 2 Georges Briard Hand Painted Glass Plates Signed US $24.95
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 SPIRAL UNIQUE DALI Feng Shui Nautilis unusual impressive 10 Inch Wall clock US $31.95
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 POND WATER TREATMENT SYSTEM WATER SOFTENER 5600 WHOLE HOUSE CHLORINATOR SYSTEM US $3,695.00
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 wall clock made in USA US $8.00
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 HELBROS WOODEN TABLE CLOCK NEW IN BOX GREAT GIFT FREE SHIPPING US $16.99
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 1997 MFA SINGING BIRD CLOCK WALL OR TABLE 8 DIAMETER US $9.99
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 PEERLESS ANTIQ 1930 40S METAL KITCHEN WALL CLOCK CLOTH COVERED CORD MADE IN USA US $9.95
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 VINTAGE TABLE TOP CLOCK GLASS FRONT GOLD LEAVES CORNERS US $30.00
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 NEW QHK021KLH Seiko Bell Sound Unofficial Hidden Mickey Mouse Seiko Alarm Clock US $39.99
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 Riedel New O Martini Tumblers Set of 2 US $38.06
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 MIKASA QUARTZ GERMAN CRYSTAL DESK CLOCK VERY NICE CLOCK US $24.95
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 Decorative Wall Clock 11 World Globe Fair Combined Shipping Self Framed US $9.99
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 New FLEUR DE LIS WALL CLOCK Hanging Decor Brown lies US $21.99
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 〓 MICHELLE ALLEN DESIGNS Wall Clock Cat Design Kimi Kitty US $55.00
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 〓 MICHELLE ALLEN DESIGNS Wall Clock Black Cat Design Klassic Kitty US $80.00
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 Vintage Nautical Theme Ships Clock Desk Table Clock US $39.99
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 Retro cream black plastic alarm clock from Urban Outfitters US $5.00
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 Decorative Hand Made Wooden Costa Rican Wagon Free Shipping in the USA US $9.50
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 Vintage GE Time Switch Made in the USA Free Shipping in the USA US $20.00
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 Hand Made Decorative Hand Fan from Antigua Free USA Shipping US $4.50
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 Hand Made South Pacific Decorative Hand Fan Free USA Shipping US $4.50
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 American Made Hardwood Single Bed Headboard US $70.00
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 Hand Made Pacific Islands Decorative Hand Fan Free USA Shipping US $4.50
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 Metal Sailing Ship Table Decoration Free USA Shipping US $15.00
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 MOVADO BLACK SILVER TRAVEL CAN CLOCK RBL00218M NEW IN BOX US $48.00
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 Quartz Pendulum Wall Clock Made from Antique Dial Free USA Shipping US $55.00
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 Happy Camper with Camper Parrot Garden Flag US $9.99
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 Large Wrought Iron Antique Home Wall Quartz Scrolled Clock Rose Fleur de Lis US $60.99
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 Custom Made Sponge Bob Lamp Free Shipping anywhere in the USA US $54.00
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 Infinity Instruments The Definitive Radio Controlled Wall Clock US $5.51
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 Personalized Handcraft Black Round Man Cave Home Bar Wooden Clock Sign Plaque f US $33.99
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 Personalized Billiards Pool Room Round Home Bar Pub Wooden Clock Sign Plaque f US $33.99
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 Personalized Handcrafted 19th Hole Golf Players Round Wooden Clock Sign Plaque f US $35.99
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 Personalized Funny Golf Ball Pattern 19th Hole Round Wooden Clock Sign Plaque f US $33.99
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 BRASS BRONC BUSTER SARSAPARILLA CLOCK 1989 BATTERY OP US $100.00
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 STUDIO NOVA QUARTZ GERMAN CRYSTAL DESK CLOCK VERY NICE CLOCK US $24.95
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 mantel fireplace clock US $39.95
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 Electronics Kitchen Cooking BIG LCD Timer Alarm Clock US $.69
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 CLASSIC GOLD BLACK Peru PAINTED GLASS WALL MIRROR Novica ART US $99.95
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 RICH COFFEE FLOWERS Peru Artists REVERSE HAND PAINTED US $97.95
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 Brand New 75 HP Rotary Screw Air Compressor US $24,091.00
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 Brand New 75 HP Rotary Screw Air Compressor w Dryer US $34,240.00
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 100 HP 3 Phase Rotary Screw Air Compressor Package US $39,010.00
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 SETH THOMAS CERAMIC MANTLE CLOCK BEAUTIFUL US $60.00
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 ELGIN PLATE WALL CLOCK QUARTZ WALL CLOCK VERY NICE CLOCK US $19.95
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 G RUGGERI WIND UP CLOCK VERY BEAUTIFUL CLOCK FROM GERMANY US $79.95
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 MARCHE DU MONDE QUARTZ DESK CLOCK NICE CLOCK FROM INDIA US $29.95
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 SANMINA SCI BEAUTIFUL QUARTZ DESK ALARM CLOCK VERY NICE CLOCK US $19.95
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 BN Paris Chic Cream Scrolly Ornate Iron Clock Shabby Pink Roses Bracket Hung US $18.95
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 New BLACK BEARS WALL CLOCK Forest LODGE Decor RUSTIC Accent Nature Forrest US $21.99
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 New TUSCANY GRAPES WALL CLOCK Fruit Kitchen Decor ART US $21.99
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 New CHILI PEPPER WALL CLOCK Southwestern KITCHEN Decor US $21.99
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 New TUSCANY WINE CLOCK Italian Wall Kitchen Decor ART US $21.99
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The World's Atomic Clock Timekeepers
When you set your watch to perhaps the speaking clock or the time on the internet, have you ever wondered who it is that sets those clocks and checks that they are accurate?
There is no single master clock used for the world's timing but there are a constellation of clocks that are used as a basis for a universal timing system known as UTC (Coordinated Universal Time).
UTC enables all the world's computer networks and other technology to talk to each other in perfect synchronicity which is vital in the modern world of internet trading and global communication.
But as mentioned controlling UTC is not down to one master clock, instead, a serious of highly precise atomic clocks based in different countries all work together to produce a timing source that is based on the time told by them all.
These UTC timekeepers include such notable organisations as the USA's National Institute of Standards and Time (NIST) and the UK's National Physical Laboratory (NPL) amongst others.
These organisations don't just help ensure UTC is as accurate as possible but they also provide a source of UTC time available to the world's computer networks and technologies.
To receive the time from these organisations, a NTP time server (Network Time Server) is required. These devices receive the broadcasts from places like NIST and NPL via long wave radio transmissions. The NTP server then distributes the timing signal across a network, adjusting individual system clocks to ensure that they are as accurate to UTC as possible.
A single dedicated NTP server can synchronize a computer network of hundreds and even thousands of machines and the accuracy of a network relying in UTC time from the broadcasts by NIST and NPL will also be highly precise.
The NIST timing signal is known as WWVB and is broadcast from Boulder Colorado in the heart of the USA whilst the UK's NPL signal is broadcast in Cumbria in the North of England and is known as MSF – other countries have similar systems including the DSF signal broadcast out of Frankfurt, Germany.
About the Author
Richard N Williams is a technical author and specialist in atomic clocks, telecommunications, NTP and network time synchronisation helping to develop dedicated NTP clocks. Please visit us for more information about an NTP server or other NTP time server solution.
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