Atomic Time
2011

For NTP server with GPS time synchronization
The GPS system is a satellite-based navigation system operated by the U.S. Department of Defense. It essentially provides a subscription-free civilian navigation and timing service. GPS is primarily intended as a very accurate global positioning and navigation reference. However, a byproduct of precise positioning, that every orbit satellite has a built-in high precision atomic clock synchronization unit of the U.S. Naval Observatory (USNO). It is therefore for the provision of a high precision time reference for timing ideal computer systems, such as NTP. This article attempts to describe just how network time server can obtain accurate timing information, to provide an accurate reference for computer time synchronization. It will also explain how the NTP server can be generated by GPS atomic time, a timing reference for Offer to use computer networks.
The GPS system is a constellation of 24 satellites in orbit, with high-precision atomic clock at each timing systems onboard. The system offers a global service that will receive anywhere on the face of the planet. The exact time will be continuously transmitted from each satellite. The time information can simply modern low-cost antenna and receiver devices are received.
The time of each satellite broadcast as Universal Coordinated Time (UTC), the virtually identical with the Greenwich Mean Time (GMT). UTC is the same worldwide, it does not vary with time zone or daylight saving time. UTC is a high-precision atomic time standard, the atomic clocks in national Standards laboratories is maintained. UTC has uniform seconds as defined by the International Atomic Time (TAI) Institute.
Each satellite broadcasts time and position information as very low-power radio-frequency transmission. The U.S. military refers to two frequencies, one for civilian use coded L1 and coded for military purposes L2. The L1 frequency is 1575 MHz (1.575 GHz) broadcast. This weak radio transmission can easily pass through less dense materials such as plastics and glass, but are blocked by denser materials such as metal and stone. However, newer more sensitive receiver is designed for indoor use.
A GPS antenna must be a 'line-of-sight "In view of the satellites. Therefore, roof antenna is ideal, with a full 360-degree view of the sky. Often, however, is an antenna on the side of a Building sufficient, unless the horizon is not too much obscured by trees or buildings. The antenna is essentially a signal amplifier, it increases the received signals for transmission over a cable to a receiver. Fifty-ohm coaxial cable typically used to transfer signal information between the antenna and receiver.
The receiver decodes the signals from the antenna into a usable, readable format received. Is the most common protocol used by receivers NMEA, which consists of a number of records transferred. Each NMEA provides a package of information, consisting of time, date and positioning information. The Protocol also additional information such as the visible satellites and satellite orientation in the sky.
NTP servers use a special receiver for timing applications tailored. Timing receivers have additional functions and circuitry to ensure a highly accurate time reference. They also lead an automated Site survey to compare satellite clocks for synchronicity. Time servers also use an accurate pulse per second (PPS) output generated by the receiver. A PPS output provides a highly accurate reference trigger for timing purposes.
The GPS system provides an ideal solution for computer network timing applications. With the "free-to-air" system, NTP Time Server can synchronize within a few microseconds UTC.
About the Author
Dave Evans has written a number of articles on time server and network timing. Click here, if you would like more information on NTP server systems.
Monster Magnet – Atomic Clock
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Time Bomb: Fermi, Heisenberg, and the Race for the Atomic Bomb by Malcolm C. Mac $4.86 |
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Geneva 14-Inch Electric Quartz Wall Clock, Black $14.25 Accurate Quartz movementShatter-resistant lensPlastic black casing… |
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Melitta MEPT1B Perfect Time 12-Cup Coffeemaker $79.99 Equipped with a digital clock/timer tuned by a radio receiver to the U.S. atomic clock, this coffeemaker brews up to twelve 5-ounce cups of coffee and, because the clock/timer can be programmed up to 24 hours in advance, will begin the brewing process automatically for wake-up coffee. The clock is split-second accurate because it automatically adjusts, if necessary, to the atomic clock’s signals s… |
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Hiroshima: Decision To Drop the Bomb [VHS] $24.95 It was August 1945, and American Marines were being slaughtered by the thousands as they advanced on the islands surrounding Japan. What the U.S. needed was a secret weapon that would end the war swiftly. Or did it? Investigate the disturbing events that led to the decision to drop the atomic bomb on Japan alongside leading historians and military experts. Hear why Japan’s ability to fight ef… |
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GE 11088 Electroluminescent Battery-Powered Clock and Plug-In Night Light $7.00 This wall clock has a glowing face that make it easy to tell time in the dark. Battery powered, this clock is always on and keeps time when unplugged or during a power loss. Plugs into standard outlet…. |
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Leviton VPT24-1PZ Vizia 24-Hour Programmable Indoor Timer with Astronomical Clock $34.31 The Vizia + 24-Hour Programmable Indoor Timer with Astronomical Clock helps lower your electrical costs without sacrificing convenience. Replacing standard switches with timer switches can reduce energy consumption, improve security, and save you money. Allowing up to 50 timer event settings per day, this timer switch can be programmed weekdays, weekends, all days or any combination of days. It (V… |
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Atomic Mass $68.51 The atomic mass is the mass of an atom, most often expressed in unified atomic mass units. The atomic mass may be considered to be the total mass of protons, neutrons and electrons in a single atom (when the atom is motionless). The atomic mass is sometimes incorrectly used as a synonym of relative atomic mass, average atomic mass and atomic weight; these differ subtly from the atomic mass. The atomic mass is defined as the mass of an atom, which can only be one isotope at a time and is not an abundanceweighted average. In the case of many elements that have one dominant isotope the actual numerical similarity/difference between the atomic mass of the most common isotope and the relative atomic mass or standard atomic weights can be very small such that it does not affect most bulk calculations but such an error can be critical when considering individual atoms. For elements with more than one common isotope the difference even to the most common atomic mass can be half a mass unit or more (e.g. chlorine). The atomic mass of an uncommon isotope can differ from the relative atomic mass or standard atomic weight by several mass units. Author: Miller, Frederic P./ Vandome, Agnes F./ McBrewster, John Binding Type: Paperback Number of Pages: 72 Publication Date: 2009/11/03 Language: English Dimensions: 5.98 x 9.01 x 0.17 inches |
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Atomic Commit $60.54 High Quality Content by WIKIPEDIA articles An atomic commit is an operation in which a set of distinct changes is applied as a single operation. If the changes are applied then the atomic commit is said to have succeeded. If there is a failure before the atomic commit can be completed then all of the changes completed in the atomic commit are reversed. This insures that the system is always left in a consistent state. The other key property of isolation comes from their nature as atomic operations. Isolation insures that only one atomic commit is processed at a time. The most common uses of atomic commits are in database system and revision control system systems. The problem with atomic commits is that they require coordination between multiple systems. As computer networks are unreliable services this means no algorithm can coordinate with all systems as proven in the Two Generals Problem. As databases become more and more distributed this coordination will increase the difficulty of making truly atomic commits. Author: Miller, Frederic P./ Vandome, Agnes F./ McBrewster, John Binding Type: Paperback Number of Pages: 68 Publication Date: 2010/12/04 Language: English Dimensions: 9.02 x 5.98 x 0.16 inches |
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Atomic Clock $44.99 No need to reset this clock for Daylight Savings Time. Radio waves keep it synchronized with the government’s atomic clock for "to the second" accuracy. Uses 1 AA battery (not included). 12 1/2″ diam. wooden frame. Choose Walnut or Natural finish. |
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Atomic Dreams $4.7 Julie is the unwilling host to remnants of an atomic alloy manufactured by the Hietzer Nuclear Research Institute, or HeNRI. Pursued by an unstoppable HeNRI agent named Ivy, Julie runs and hides in the Nevada desert, aided by the unlikly allies of a gang of bikers and park ranger, Dillon. But there is another: a nameless madman who stalks Julie and her precious alloy, leaving a trail of death and destruction in his path. It’s a race against time in the hit series by Eisner Award winning creator, Terry Moore. This trade paperback collects issues 6-10. |
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An Atomic Romance $3.94 This provocative, rollicking story is the much-anticipated new novel-the first in over a decade-from acclaimed author Bobbie Ann Mason. In An Atomic Romance we meet Reed Futrell, a sexy, thoughtful hero who grapples with radioactive contamination, a midlife crisis, and string theory-all while falling in love. Reed is an engineer at a uranium-enrichment plant near a riverside city in heartland America. He has deep roots in this community: He was raised there; his father worked at the very same plant before him. And it was here that Reed met, married, and then divorced his wife. Reed spends countless nights camping at a local wildlife preserve, gazing at the stars, fishing and hunting-that is, until deformed frogs are discovered at the site. Though his father was killed in a tragic accident at the atomic plant years ago, Reed stays on, proud to perform demanding and dangerous work for the benefit of the nation. As for the radioactive "incidents" he has endured, Reed prefers to think about other things-Hubble photographs of distant galaxies, Albert Einstein, his dog. Reed’s casual attitude toward danger infuriates his on-again-off-again girlfriend, Julia, as much as his quirky mind and muscular body intrigue her. Julia, a biologist, is truly Reed’s match-or maybe more than his match. They both are witty, curious, and fascinated by science. Indeed, their courtship began with banter about Stephen Hawking’s theories of space-time, and ever since it has been an up-and-down adventure of sexual attraction, intellectual game-playing, and long silences when Julia refuses to return Reed’s calls. When news reports reveal evidence of radioactive pollution in the land surrounding the plant, Reed and Julia’s relationship faces an unprecedented challenge. In An Atomic Romance, Bobbie Ann Mason delivers a brilliant novel set against a backdrop of atomic power: a love story between a motorcycle-riding loner and an independent, strong-minded biologist; between the peaceful present in a typical American community and the nation’s violent nuclear past; and, finally, between a good man and the work he takes pride in, though it may be putting his life in danger. "From the Hardcover edition." |
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ACROPRINT ACRES700 Acro Es700 Atomic Time Recorder And Stamp $452.25 Acro Es700 Atomic Time Recorder And Stamp. Manufactured to the highest quality available. With true enhanced performance. |
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Atomic Robo and Other Strangeness $15.34 Atomic Robo faces an invasion from the Vampire Dimension, finds a giant kaiju monster attack in the heart of Tokyo, detours to the South Pacific to battle wits with Dr. Dinosaur, then comes face-to-face with his newest enemy: his oldest enemy Collects the Atomic Robo and the Revenge of the Vampire Dimension mini-series, the Free Comic Book Day 2009 story Why Atomic Robo Hates Dr. Dinosaur, and an assortment of Robo mini-comics in print for the first time |
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Atomic Weapons and East West Relations $37.57 This book was originally published in 1956, it provides an analysis of atomic power up until the time of publication. Professor Blackett divides the use of atomic power into three periods: the time of American atomic monopoly, the time of American atomic superiority and the time of atomic parity with Russia. In analysing these periods, Blackett provides an unconventional but reassuring estimate of the situation. Much of the extreme anxiety in the West, he argues, is the result of faulty military and political thinking, with Western countries making particular errors of judgement in terms of the atomic arms race. This book will be of value to anyone with an interest in atomic power and the Cold War. Author: Blackett, P. M. S. Binding Type: Paperback Number of Pages: 116 Publication Date: 2011/05/01 Language: English Dimensions: 5.00 x 8.00 x 0.28 inches |
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Talking Atomic Watches Mens $69.98 Now you can always have the right time! Talking Atomic Watches automatically receive the atomic time signal in the UK, Germany, Canada, U.S.A. and Japan. Simply set the watch to the desired time zone and it will automatically update to the correct time. At the press of a button, watches speak the time and date in a clear voice with radio-controlled accuracy, with speech recorded by the Royal National Institute for Blind People. The clear analog face design is easy to read and the setting button is flush with the case to avoid accidental activation. The watch can be manually set in countries with no atomic time signal and automatically adjusts for spring and fall time changes. Adjustable black leather strap. Battery included. Men’s dial is 1½” in diameter. Women’s dial is 1¼” in diameter. Choose Men’s or Women’s |
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Talking Atomic Watches Womens $69.98 Now you can always have the right time! Talking Atomic Watches automatically receive the atomic time signal in the UK, Germany, Canada, U.S.A. and Japan. Simply set the watch to the desired time zone and it will automatically update to the correct time. At the press of a button, watches speak the time and date in a clear voice with radio-controlled accuracy, with speech recorded by the Royal National Institute for Blind People. The clear analog face design is easy to read and the setting button is flush with the case to avoid accidental activation. The watch can be manually set in countries with no atomic time signal and automatically adjusts for spring and fall time changes. Adjustable black leather strap. Battery included. Men’s dial is 1½” in diameter. Women’s dial is 1¼” in diameter. Choose Men’s or Women’s |
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Lathem 1500E Wireless Atomic Time Recorder $247.99 0% 1 Each 1 Year 12 Hours 120 V AC 1500E 1500E Wireless Atomic Time Recorder 24 Hours 4.40 lb 5.70″ Height x 6.30″ Width x 7.20″ Depth 60 Hz Enable or disable printing of leading zeros. Print 2 or 4 digit years Power: 120VAC ± 10%, 60HZ, 0.4A Operating Temperature: 23ºF to 113ºF Operating Humidity: 20% to 80% non-condensing Using the same technology NASA employs to tell time, 1500E time clock wirelessly synchronizes with the National Institute of Standards and Technology’s (NIST) atomic clock in Boulder, Colorado. In addition to confirming the time daily, the 1500E automatically adjusts for Daylight Saving Time. No wires, no worries, and no more excuses for being late. As a time clock, the 1500E records employees’ in and out times for payroll accounting. As a job clock, it can track project time for accurate costing. And as a document stamp, the 1500E can print the date, time and preset messages on important documents. Case is made of plastic. AC Supply APR’D Automatic Daylight Saving Automatic Printing CFMD CMPL’D Calendar – Until Year 2099 Card Punch/Stamp Charcoal Gray Date Date Time Stamper Desktop Dot Matrix Printer English FAXED FILED French IN LCD (Date, Time, Day of the Week) Lathem Lathem Time Company Manual Printing No ORIGIN Out PAID Plastic Portuguese RCVD SENT Semi-automatic Printing Spanish Time USED VOID Wall-mountable www.lathem.com |
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Atomic Wall Clock Aluminum $47.99 Accurate Time — All the Time This La Crosse Technology analog wall clock is “Atomic” (ie “radio controlled”). It sets itself using transmissions received from the U.S. government, which include precise timing information from the U.S. Atomic Clock in Colorado. Radio controlled time (hour, minute, second) Radio controlled date (month, date, year, day) Indoor temperature (F or C) Remote temperature (F or C) Moon phase (8 phases) Time alarm Snooze for alarm Day can be displayed in English, French, Spanish or German Dual LCD screens Wall Hanging or Free-standing (fold out stand) 12 or 24 hour time mode Time Zones from GMT to 12 GMT Three letter identification for US time zones Includes TX6U Transmitter Actual Size: 12.20 x 1.18 x 8.03″ Garden.com Exclusive 2 Year Guarantee |
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Atomic Wall Clock Cherry $47.99 Accurate Time — All the Time This La Crosse Technology analog wall clock is “Atomic” (ie “radio controlled”). It sets itself using transmissions received from the U.S. government, which include precise timing information from the U.S. Atomic Clock in Colorado. Radio controlled time (hour, minute, second) Radio controlled date (month, date, year, day) Indoor temperature (F or C) Remote temperature (F or C) Moon phase (8 phases) Time alarm Snooze for alarm Day can be displayed in English, French, Spanish or German Dual LCD screens Wall Hanging or Free-standing (fold out stand) 12 or 24 hour time mode Time Zones from GMT to 12 GMT Three letter identification for US time zones Includes TX6U Transmitter Actual Size: 12.20 x 1.18 x 8.03″ Garden.com Exclusive 2 Year Guarantee |
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Atomic Wall Clock Oak $47.99 Accurate Time — All the Time This La Crosse Technology analog wall clock is “Atomic” (ie “radio controlled”). It sets itself using transmissions received from the U.S. government, which include precise timing information from the U.S. Atomic Clock in Colorado. Radio controlled time (hour, minute, second) Radio controlled date (month, date, year, day) Indoor temperature (F or C) Remote temperature (F or C) Moon phase (8 phases) Time alarm Snooze for alarm Day can be displayed in English, French, Spanish or German Dual LCD screens Wall Hanging or Free-standing (fold out stand) 12 or 24 hour time mode Time Zones from GMT to 12 GMT Three letter identification for US time zones Includes TX6U Transmitter Actual Size: 12.20 x 1.18 x 8.03″ Garden.com Exclusive 2 Year Guarantee |
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14in Atomic Analog Clock $40 Accurate Time — All the Time This La Crosse Technology analog wall clock is “Atomic” (ie “radio controlled”). It sets itself using transmissions received from the U.S. government, which include precise timing information from the U.S. Atomic Clock in Colorado. Please note that the radio transmissions that contain the timing information carry best at night. When you first put the batteries in these clocks, they will most likely not receive a strong enough signal to set themselves until the middle of the night. Features: Atomic time with manual setting Automatically sets to exact time Accurate to the second Automatically updates for daylight saving time (on/off option) 4 time zone settings Simple operation: insert 1 “AA” alkaline battery Dimensions: 14″ Diameter Specifications: Simple Operation: Insert One “AA” Alkaline Battery After signal is received, press Time Zone button to set Four Time Zone Settings Daylight Saving Time Option On/Off Manual Reset Button Power requirements: Clock: One “AA” Alkaline Battery |
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Casio Atomic Baby-G – Black $79 The new Casio Atomic Baby-G brings atomic timekeeping to the durability and fashion of the Baby-G. Atomic Timekeeping Shock Resistant 100M Water Resistant (330ft) Electro-Luminescent Backlight Light with Afterglow World Time (48 cities) 1/100 Second Stopwatch Hourly Time Signal Auto Calendar 12/24 Hour Formats Battery CR1220 Module 3772 |
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Casio Atomic Baby-G – White $79 The new Casio Atomic Baby-G brings atomic timekeeping to the durability and fashion of the Baby-G. Atomic Timekeeping Shock Resistant 100M Water Resistant (330ft) Electro-Luminescent Backlight Light with Afterglow World Time (48 cities) 1/100 Second Stopwatch Hourly Time Signal Auto Calendar 12/24 Hour Formats Battery CR1220 Module 3772 |
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Equity 31269 SkyScan Atomic Projection Clock $19.99 24 Hour Time 31269 31269 SkyScan Atomic Projection Clock Atomic clock automatically sets itself – never needs setting Adjustable arm to project on wall or ceiling Time projects with focus adjustment Celsius or Fahrenheit option Atomic signal indicator Atomic Atomic Automatic Equity Equity Industries Corp Projection Snooze Table Clock Temperature Temperature Display www.equitytime.com |
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Atomic Clock With Moon Phases $46.99 This Atomic Clock with Moon Phases is a sleekly stylish way to tell the time! This clock displays time, month, date, weekday, and current moon phase! Also, this clock can provide indoor/outdoor temperature readings. The outdoor temperature can monitor down to -39.8 degrees Fahrenheit. Brrr! And best of all, because this is an atomic clock, it automatically adjusts itself to the accurate time when it’s Daylight Savings Time. This clock features a large LCD display, and real wood trim. The body of the clock is constructed from durable plastic. This item ships directly from the manufacturer. Product usually arrives in 2-8 business days, depending on destination, including order processing and shipping. APO/FPO shipping unavailable |
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Westclox Tech Atomic LCD Alarm Clock #70026AX $12.99 The official standard for time keeping is the National Atomic Clock located in Fort Collins, Colorado. This atomic clock is operated by the National Institute of Standards and Technology (NIST) and is accurate to within ten billionths of a second per day. The NIST constantly broadcasts the atomic clock time signal. This Westclox atomic digital clock ensures accuracy to a fraction of a second by automatically receiving and adjusting to the NIST atomic time signal daily. Features: Atomic split second accuracy, touch activated Blue backlight, month/date/day display, indoor temperature display, and DST (automatically adjusts). Requires 2 “AA” batteries (not included). Model #70026AX. |
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Atomic Lobster $3.95 Serge A. Storms is back with a bullet, torn between homicide and souvenirs, cranking up the fevered action as the pot boils over on a street called Lobster Lane. It’s reunion time in the Sunshine State, and we’re not just talking the family jamboree of the blood-soaked McGraw criminal clan, whose nastiest, meanest member, finally released from prison, is heading south bent on revenge. Serge’s drug-addled bud Coleman’s here as well, torn between getting hammered and getting more hammered, while trying to construct the biggest bong ever. Meanwhile the government is covering up a growing list of mysterious victims across Florida who may or may not be connected to a nefarious plot being hatched against national security. Something has set the Non-Confrontationalists off on a rampage. And "everyone" is rushing to flee Tampa on a cruise ship to hell. |