International Time
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 German Musical Mantle Clock with disk  US $300.00
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 Vintage Mid Century 1960s AIMOR Travel Clock w Am Fm Radio Leather Case US $45.99
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 Westclox 1927 Ben Hur White Dialed Alarm Clock Very Rare US $13.50
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 Westclox 1935 Black Dialed Big Ben Loud Alarm Clock US $25.00
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 EXQUISITE ANTIQUE FRENCH PAINTED PORCELAIN BRONZE MANTEL CLOCK JAPY FRERES US $599.00
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 Vintage HeathKit GC 1092D Digital 24 Hour Clock US $28.00
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 Beautiful Baume Mercier Formula S with Date Quartz Movement US $150.00
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 Skeleton Decorative clock Brand New NIB contemporary stainless steel watch US $67.99
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 Pair of Staiger Ruege Musical Alarm Clocks Maytime US $17.16
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 Vintage Linden Black Forest Alarm Clock Made in Western Germany US $10.00
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 Antique Silver Plated BRASS CARRIAGE CLOCK Oval Figure Dial Good working US $99.99
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 RETRO WESTCLOX BABY BEN ALARM CLOCK STAINLESS STEEL SILVER MADE IN USA WORKS US $22.99
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 VINTAGE RETRO WESTCLOX BABY BEN ALARM CLOCK WHITE FACE BRASS MADE IN USA WORKS US $21.99
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 VINTAGE NEW HAVEN TRAVEL CLOCK IN LEATHER CASE US $20.00
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 Cloisonne Mantel Clock Stunning Gold Guilded Case Beveled Glass US $161.50 |
 Jennings Brothers Vintage Metal Art Nouveau Desk Clock US $14.50
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 VINTAGE 1960S HAMILTON 686 17 JEWELS 10K RGP CASE WRIST WATCH RUNS US $49.00
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 Vintage Du Chateau Orologio Sveglia 7 Jewels 8 Day Desk Clock US $51.00
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 SMALL VINTAGE MANTEL CLOCK 11 TALL UNKNOWN MAKE 515B US $48.00
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 VINTAGE CHELSEA BATTERY POWERED SHIPS CLOCK 515F US $125.00
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 VINTAGE TERRY ANDREWS STEEPLE MANTEL CLOCK 20 TALL 515C US $125.00
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 ORANGE COUNTY CHOPPER 14 WALL OR SHELF WHEEL CLOCK WITH TOOL HANDS COLLECT US $27.99
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 Ships Wheels Nautical Mantle Clock 14 Marine US $29.93
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 VINTAGE LE COULTRE PERPETUAL MOTION CLOCK ATMOS 15 JEWELS GOLD GLASS MANTEL US $438.00
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 MAN CAVE Wall Clock sports man room garage sign gift US $14.99
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 Vintage GE General Electric Red Kitchen Clock Telechron Model 2HC39 Working US $11.49
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 Vintage Spartus Yellow Kitchen Wall Clock Model 501 NR US $9.99
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 TIFFANYCOCHELSEA SHIPS CLOCK VTG BRONZE PLATED BRASS reduced1925SERIAL167641 US $1,119.90
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 1920s Art Deco Manning Bowman Electric Table Clock US $65.00
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 Nice Early Small 4 Pillar Celluloid Clock US $65.00
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 Very Unusual Elgin National Watch Wooden Shadow Box with Parts Display US $26.99
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 Pristine LeCoultre Atmos 528 Very Mint 1960s S123XXX Fully Overhauled Restore US $989.00
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 Vintage Brass Linden Black Forest Twin Bell Alarm Clock Germany US $29.99
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 Vintage West Clox America Single Bell Alarm Clock US $19.99
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 Beautiful LeCoultre 1960s Atmos 528 S154XXX Fully Serviced Working Bid Now US $869.00
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 Art Deco Style Sessions Wooden Electric Mantel Clock Sold in As Is Condition US $11.99
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 Casio Moon Graph GMQ 100 Alarm Clock Vintage Mint US $69.90
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 8 Bit Skull Stainless Steel Slim Watch Cool New NR US $.99
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 Arashi Stainless Steel Slim Watch Cool New NR US $.99
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 General George S Patton Jr 1885 1945 Stainless Steel Slim Watch New US $.99
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 VINTAGE BRASS CARRIAGE CLOCK PLAIN DESIGN WORKING GOOD US $99.99
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 Enough Time Clock by Our Name is Mud Ceramic Tile Wooden Frame Lorrie Veasey NEW US $9.99
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 VINTAGE BABY BEN ALARM CLOCK BLACK KEEPS ACURATE TIME US $8.95
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 EXTREMELY RARE 1971 Red Sesame Street Schoolhouse Talking Alarm Clock w Box 150 US $144.09
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 EXCELLENT BROWN LEATHER FINISH CARRIAGE CLOCK CASE US $45.00
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 GORGEOUS GERMAN 3 WEIGHT GRAND SONNERIE VIENNA FULL COLUMN REGULATOR WALLÂ CLOCK US $560.00
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 Unusual Junghans Chiming Bracket Clock NO RESERVE US $69.00
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 AMERICAN EAGLE 2 BALL ANSONIA CUT 8 DAY MOVEMENT SWINGING CLOCK US $285.00
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 ELEPHANT MYSTERY MECHANICAL SWINGING CLOCK No Reserve Price US $36.00
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 Very Interesting Animated Brass BirdCage Alarm Clock US $17.50
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 Vintage Men Casio Chrono Alarm AW 600 Quartz Watch US $155.90
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 Vintage Casio Digital Multi Planner Watch BGP 200 Mint US $62.50
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 Bulova Miniature Gold Clock US $12.99
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 JAPAN 1970s MENS WATCH SEIKO DIVERS 150M AUTOMATIC ORANGE COLOR DIAL US $129.99
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 VTG 50s ELGIN alarm CLOCK wind up TRAVEL luminous LEATHER CASE MADE WEST GERMANY US $.99
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 SWISS 1980s MENS WATCH RADO VOYAGER AUTOMATIC MANUAL WIND YELLOW GOLD DIAL US $99.99
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 SWISS 1980s MENS WATCH RADO VOYAGER AUTOMATIC MANUAL WIND GREY COLOR DIAL US $99.99
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 JAPAN 1970s MENS WATCH CITIZEN WINDING WIND SOFT PINK COLOR DIAL US $24.99
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 Vintage Hammond Synchronous Mantel Clock US $50.00
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 JAPAN 1970s MENS WATCH SEIKO DIVERS 150M AUTOMATIC 7002 BLACK COLOR DIAL US $129.99
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 JAPAN 1980s MENS WATCH SEIKO AUTOMATIC 7009 24hrs BLACK COLOR DIAL US $24.99
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 Casio Forester Fishing Moon Graph Ditial Watch FT 200W FT 200 US $129.99
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 Westclox 1990 White Dialed BABY BEN Clock Very Rare US $12.50
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 Western 1925 Black Dialed Jack oLantern Alarm Clock Very Rare US $12.50
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Understanding GPS Time in Relation to UTC
Accurate time is so important for modern computer systems that it is now unimaginable for any network administer to configure a computer system without any regard to synchronisation.
Ensuring all machines are running an accurate and precise time, and that the entire network is synchronised together, will prevent problems arising such as data loss, failure of time sensitive transactions and enable debugging and error management which can be near impossible on networks that lack synchronicity.
There are many sources of accurate time for use with NTP time servers (Network Time Protocol). NTP servers tend to use time that is controlled by atomic clocks to ensure accuracy, and there are advantages and disadvantages to each system.
Ideally as a source of time you want it to be a source of UTC (Coordinated Universal Time) as this is the international time standard as used by computer systems worldwide. But UTC is not always accessible but there is an alternative.
GPS time
GPS time is the time as relayed by the atomic clocks on board GPS satellites. These clocks form the basic technology for the Global Positioning System and their signals are what are used to work out positing information.
But GPS time signals can also provide an accurate source of time for computer networks – although strictly speaking GPS time does differ to UTC.
No Leap Seconds
GPS time is broadcast as an integer. The signal contains the number of seconds from when the GPS clocks were first turned on (January 1980).
Originally GPS time was set to UTC but since GPS satellite have been in space the last thirty years, unlike UTC, there has been no increase to account for leap seconds – so currently GPS is running exactly 17 seconds behind UTC.
Conversion
Whilst GPS time and UTC are not strictly the same as they were originally based on the same time and only the lack of leap seconds not added to GPS makes the difference, and as this is exact in seconds, conversion of GPS time is simple.
Many GPS NTP servers will convert GPS time to UTC time (and local time if you so wish) ensuring you can always have an accurate, stable, secure and reliable source of atomic clock based time.
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 a Galleon ntp time server or other ntp server solutions.
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