Gps Systems

Gps Systems

GPS Systems
Are you one of​ those people who would rather drive around town for​ hours than stop and​ ask for​ directions? if​ so, a​ Global positioning system, or​ GPS, could be the​ perfect tool for​ you.
A GPS is​ an​ operational navigational system that employs the​ use of​ navigational satellites .​
In other words, it​ tracks an​ individual's location or​ provides direction, all by using an​ existing satellite system .​
GPS units are also capable of​ providing real time reference on earth, or​ within its orbit.
The satellite navigation system was implemented and​ first used by the​ United States of​ America's Department of​ the​ Defense .​
Later, the​ system was adopted for​ use by other countries including Europe (Galileo) and​ Russia (GLONASS) .​
In the​ United States, any US citizen may use the​ navigational system, free of​ charge.
The satellite navigational system is​ primarily divided into three segments:
* Space: as​ the​ name suggests, the​ space segment works from outer space .​
It operates through a​ GPS satellite constellation, located in​ an​ Intermediate Circular Orbit.
* Control: the​ control segment of​ a​ satellite navigational system is​ comprised entirely of​ control stations that are located on earth .​
These terrestrial control stations are scattered at​ locations around the​ world .​
These control the​ flight paths of​ the​ various GPS satellites, and​ synchronize the​ atomic clocks in​ the​ satellite .​
Ground stations also monitor the​ uploading of​ data through the​ satellite transmissions.
* User: the​ satellite navigational system is​ mainly made up of​ civilian and​ military GPS receivers.
A GPS is​ technically comprised of​ 24 satellites, the​ minimum number of​ satellites in​ a​ constellation .​
These satellites orbit around six orbital planes, twice in​ every twenty-four hour period .​
Each satellite carries an​ atomic clock, which continuously transmits precise time to​ the​ ground observatories located in​ the​ Earth .​
Additionally, the​ satellites send electronic messages to​ the​ earth .​
These messages may include data on precise time based upon the​ onboard satellite clocks, or​ information on their own orbital systems.
It's not necessary for​ the​ user to​ be equipped with the​ precise clock, however a​ good short term clock may be required in​ order to​ receive the​ satellite transmissions best used in​ determining the​ exact location on earth .​
Different satellites employ various sequencing modes, allowing the​ transmission of​ messages to​ be received by the​ user from satellites using similar frequencies.
The primary GPS system was created to​ provide control over the​ military forces in​ the​ United States .​
This allowed for​ improved command capability, as​ well as​ the​ targeting and​ manipulation of​ missiles, smart bombs and​ other forms of​ ammunition .​
The satellites are also able to​ detect nuclear detonators.
Civilian users can also access the​ GPS system through their GPS receivers and​ GPS system software .​
Many cities in​ highly urbanized countries have improved the​ lives of​ their citizens where access is​ available to​ the​ free worldwide GPS Standard Positioning Service .​
The transportation sector has greatly benefited from the​ system, as​ many planes, ships and​ cars employ GPS systems for​ navigation .​
Hikers, glider pilots, mine truck drivers and​ everyday travelers enjoy access to​ the​ GPS system through low cost GPS receivers, ranging in​ price from $100 to​ $200 .​
GPS receivers that are more precise are widely used by land surveyors for​ measuring land surface area, locating boundaries and​ surveying markers.
Time code generators also rely on the​ GPS system to​ acquire accurate time for​ precisely recording events in​ real time .​
Developers are also working on specially created GPS systems that will help visually impaired individuals.
Another, more trendy use of​ GPS receivers is​ the​ widely popular hobby of​ Geocaching .​
Children and​ adults use hand held GPS receivers to​ navigate designated sites and​ locate hidden objects .​
There are countless Geocaches hidden all over the​ world, with coordinates available on Geocaching websites.
The GPS system has brought both excitement and​ simplicity to​ the​ lives of​ countless people, all over the​ world .​
Despite the​ complexity of​ the​ system, anyone with a​ GPS receiver can use the​ service, free of​ charge .​
So now you'll have no excuse for​ getting lost.

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