Article by Magdalena Sperber
Copyright (c) 2007 Galleon Systems
This article describes how GPS Time server Systems achieves exact timing information to give a very accurate timing reference for Network Time Synchronization.
GPS System is a navigation system operated by the Military but also can be used by the civilian and does not need any subscription. The GPS System is known as an extremely accurate global positioning system. Each GPS satellite has an onboard a highly accurate atomic clock, ideal for supplying the correct time for computer network time synchronization.
GPS Time Servers: The GPS System exist of a constellation of 24 orbiting satellites, each has a precise atomic clock timing reference and covers the entire globe. The exact time information can be continuously broadcast from each of the satellites. You can receive the broadcast timing information with a relatively low cost GPS antenna and receiver.
GPS time is transmitted as Universal Coordinated Time (UTC), which is similar to Greenwich Mean Time (GMT). The UTC time is the same worldwide and does not vary regarding the time zone or daylight saving time. UTC is a very accurate atomic time standard sustained by atomic clocks located in national standards laboratories. UTC has consistent seconds distinct by the International Atomic Time (TAI) Institute.
GPS Radio Transmission: The GPS satellites broadcast information as very low-power radio frequency transmission. There are two designated frequency that are used, one for civilian use coded L1 and the Military use coded L2.The civilian L1 frequency is transmitted at 1575MHz. It can easiliy pass through plastic and glass but is blocked by metal and brick.
GPS Antenna Location: The precondition to receive transmission from as many satellites as possible is a good clear view to the sky. Ideally a roof mounted antenna is best with a full 360-degree view of the sky. Conversely, an antenna can be located on the side of the building with a 180-degree view of the sky if the horizon is not too obscured.
GPS Antenna Types: The GPS antenna is essentially a signal amplifier. The antenna improves the received GPS signals for transmission along a cable to a receiver for decoding. A Coax Cable is normally used to transfer signal information between the GPS antenna and receiver. The GPS antennas are available in a range of sizes and shapes. The general antennas being pole-mounted are dome shaped antennas and small patch type antennas. The pole-mounting antenna screws onto the threaded pole for mounting. Whereas the patch type antenna is a small flat bottomed device ideal for mounting on a windowsill.
GPS Receivers: GPS Receivers decipher the GPS transmission received from the antenna into a useable format. NMEA is the most common protocol used by the GPS receiver. This protocol insists a number of sentences which provide a packet on information confirm of time, date and positioning information. The NMEA protocol quotes information indicating visible satellites and satellite location.
GPS time servers can use a specific GPS timing receiver. These timing receivers have additional functions to provide a highly accurate reference time. The timing receiver can also perform an automated survey and compare satellite atomic clocks to check for synchronicity. GPS time servers may also use an accurate pulse per second (PPS) output, which provides a highly accurate reference trigger for GPS timing, generated by the receiver.
GPS Antenna Installation: The gain of the antenna and the coax is important for the maximum cable distance that can be used by a GPS antenna and receiver. A typical antenna utilize with a GPS time server may have 35dB gain. RG58 coax has an attenuation of 0.64dB/m at 1575MHz. Therefore a cable length of 35/0.64=55m could be used. Higher quality coax has a much lower attentuation value allowing longer cable runs. Also GPS amplifiers and updown converters can be utilized to increase the cable length. Surge lightening arrestors are also recommended on externally mounted GPS antenna to protect expensive network equipment from potential damage by lighting strikes
The author; Magdalena Sperber is a specalist techincal author who expertise is GPS time server soloutions to ensure accurate time. http://www.galsys.co.uk
A federal judge recently ruled that the FBI can use GPS tracking devices on vehicles without a warrant. Cenk Uygur, Ana Kasparian and former prosecutor Steve Oh discuss on The Young Turks. www.rawstory.com Subscribe to The Young Turks: bit.ly Download the politics or entertainment hour of this TYT episode: goo.gl Find out how to watch The Young Turks on Current by clicking here: www.current.com The Largest Online New Show in the World. Google+: www.gplus.to Facebook: www.facebook.com Twitter: twitter.com
Video Rating: 4 / 5
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To be honest, I’m not hugely shocked about this, but that might be because I live in a country where cops have always (I think) been allowed to do warrantless home searches and all that stuff… so I’m used to the idea that the police just have a lot of freedoms…
where are you from?
Good news everyone- as of this morning the Supreme Court in US v. Jones has said that this sort of thing IS a search and without a warrant is unconstitutional.
Cenk: “All your conversations.”
YouTube Subtitles hears “Holy power stations.”
I’m with YT on this one.
This is brilliant! So I can obtain the scent gland of a mink and stick it inside a hot car if it’s parked outside a mall. Hey it’s out in public…
this is OLD news.
i get a great sense of fear from you guys. fear and conspiracy. im not from the US but manipulative, corrupt politics from your government will effect politics and economy over here. my fear is, while your government ignores your constitution, they can do anything they want. germany is establishing similar things right now. im afraid for my freedom of speech. i dont want to feel fear that close to me…
Ana’s beautiful :}
@SteelCityDucati Don’t worry, US will beat them.
@InfiniteMushroom you dont even know me, and still you attack me…
Tell me how free you are in that day.
Ok so you saying that nothing have happen yet:)
You can’t even articulate your pathetic position, let alone display good grammar.
You did not answer the question:) 5th time now!
What freedom have you lost?
Well we wont agree on this issue, so bye.
@jallison79 …so fucking sad because you’re right…
@chrlpolk This isn’t leeway, this is the total removal of entire chapters.
@yzeone 1) Lol If you don’t believe me, please explain to me why it says “Pro-Life Champion” on his website
2) What about non-religious people who want to get married? Do they have to become religious and go to a church for that service?
3) If his stance is to dismiss it because he feels it is a state issue when it’s not, he’s ignorant. One way or another, if he enters office, it will be an issue has has to address on a federal level.
Just remember, every other country is even worse.
@timesplitters333 You and Tom Parsons go watch Fox News and celebrate insanity as freedom. You can’t even articulate your pathetic position, let alone display good grammar.
You are very well fitted for the future. Bred and marinated in a world of lies where ISP’s, junk food, and Wal-Mart is all the proof you need to feel free. Wait until you find yourself unable to adjust to conditions forced upon you by tyrants, both corporate and gov’t. Tell me how free you are in that day.
@Orpheus1356 I’ve heard him answer the question on abortion several times in debates… he isn’t pro-life, period… he says the federal government has no right to impose a single idea concerning a controversial topic on a whole country. he isn’t necessarily “pro-choice”, he’s pro-state-choice… he says government shouldn’t be involved in marriage, as it’s a religious issue and churches should be free to marry anyone they like… sorry if u think that won’t work, but its his stance
@InfiniteMushroom so you angry of nothing..
and you say tyranny…
of course, because you selfish ass have felt tyranny. give me a break.. you doing the same as you did 10 years ago, and you angry of something superficial…
go home and eat you pizza kid, you have lost nothing!
Again
Cenk flip flops on adhering to the Constitution. I remember not too long ago when he was saying that we have to give the Constitution some leeway… Well, here’s the leeway. What’s wrong. Cenk? Isn’t this what you wanted?
@SHEEPLEwhisperer Alex is right but, he always pulls his punches when it comes time to discuss the one thing he never touches. Organized and principled armed revolution in response to tyranny. He gets his audience whipped up into a frenzy and then pulls back by saying it’s all in the context of “infowar” or feckless appeals to a system that undermines and betrays us
His goal is to agitate the sheep into buying crap from Midas and other GCN sponsors. Hot air NEVER stops tyranny!
@timesplitters333 Look, I’m not going to fall for your simple-minded approach to “freedom.” Nor will I be pushed in that direction so you can play some lawyer’s word games with me. To insist that “freedom” is a function of one person’s experience is STUPID. I think I explained my position more than adequately. Either you’re trolling or just hopelessly brainwashed. You are EXACTLY like the character, Tom Parsons, in Orwell’s 1984. A free fool who sees no tyranny around him.
i’m scared for the future of this country. we will slowly decline and lose sustainability and become a 3rd world country. a good part of the world is hostile towards america.
@InfiniteMushroom what freedom have you lost?
@salsaaddict1 ……I don’t think she’s happy working at TYT anymore and it’s beginning to show in her attitude.
From what I hear….all US cars made after 2004, have GPS automatically installed.