Global Positioning System (GPS) is a system that utilizes satellite navigation. GPS receivers receive signals from several satellites orbiting the earth. Satellites that orbit around the earth in this short composition consists of 24 satellites, with 21 active satellites and 3 satellite as a backup. With the arrangement of a particular orbit, the GPS satellites can be received in the whole earth with the appearance of fruit 4 to 8 satellites. GPS can provide position information and time with very high accuracy.
Before the GPS is known, once people use a few natural signs in determining the location and directions. By the time they were on land, they use some natural references such as mountains, trees or rock types. Natural signs in the nature is not conserved in the event of natural disasters such as floods that cause landslides or earthquakes that can eliminate all of it.
To replace the natural signs, then people use Compass as a determinant of the direction. In addition to these tools are also using a particular constellation as a determinant of the direction. But the star observation method was very time consuming because one must calculate the angle that is between the stars to determine direction of travel in the vast ocean.
Exactly five years ago, Bill Clinton announced the use of satellite navigation systems for the Global Positioning System began to be used by civilians, before GPS is a proprietary technology that is used only among the military.
GPS satellites first launched in 1978 and orbits at an altitude of 20.200km. GPS satellites are not geostationary "relatively fixed position on the equator, orbiting one of the rotation of the earth" as we use satellite communications for Internet and television broadcasts, but the orbits of two times a day.
How it works GPS
To determine the position of the GPS, it takes at least 3 satellites. Measurement based on GPS position measurement system of mathematics called Triliterasi. Measurement is a point with the help of reference points 3. Suppose you are in a city of A (here we regard the city as a point), but you do not know where you are. To know your existence, you ask someone, and the person answering that you are 2 km from the city of B. This answer did not satisfy you because you do not know whether you are in the south, north, west, or east of the city of B. Then you ask the people to-2 and get an answer that you are located 5 km from the town of C. With this answer you have to imagine where your position, there are only 2 points different possibilities that intersect the circle with a radius between city A to city B and the circle with a radius of a city with city C. To further clarify the more you mumerlukan to 3, for example you are in 1 km from the town D. Thus you get the intersection of the circle with a radius distance of the city A to B, the circle between city A and city C, and the circle of the city A and city D A town in GPS is the GPS receiver, the city B, C, and D is the satellite.
Benefits of GPS technology can be used to several areas including:
* Military
GPS can be used for war purposes, such as guiding the direction of the bomb, or know where the troops are. In this way we can find out where friends where your opponent to avoid the wrong target, or determine the movement of troops.
* Navigation
Many also use GPS navigation devices such as a compass. Several kinds of vehicles have been equipped with GPS for nivigasi tool, by adding a map, then it can be used to guide motorists, so motorists can see which path should be selected to achieve the desired objectives.
* Geographic Information System
GPS is often also involved in making maps, such as measuring the distance the border, or as a reference measurement.
* Vehicle Tracking
Other uses are as GPS vehicle tracking with the help of GPS vehicle owner / manager of the fleet could find anywhere keberaadaan vehicle / asset movement at this time.
* Monitor Earthquake
Even today, the GPS with high precision can be used to monitor the movement of soil, which ordenya mm in one year only. Monitoring land movements is useful for estimating the occurrence of an earthquake, either volcanic or tectonic movement.
from various sources
Before the GPS is known, once people use a few natural signs in determining the location and directions. By the time they were on land, they use some natural references such as mountains, trees or rock types. Natural signs in the nature is not conserved in the event of natural disasters such as floods that cause landslides or earthquakes that can eliminate all of it.
To replace the natural signs, then people use Compass as a determinant of the direction. In addition to these tools are also using a particular constellation as a determinant of the direction. But the star observation method was very time consuming because one must calculate the angle that is between the stars to determine direction of travel in the vast ocean.
Exactly five years ago, Bill Clinton announced the use of satellite navigation systems for the Global Positioning System began to be used by civilians, before GPS is a proprietary technology that is used only among the military.
GPS satellites first launched in 1978 and orbits at an altitude of 20.200km. GPS satellites are not geostationary "relatively fixed position on the equator, orbiting one of the rotation of the earth" as we use satellite communications for Internet and television broadcasts, but the orbits of two times a day.
How it works GPS
To determine the position of the GPS, it takes at least 3 satellites. Measurement based on GPS position measurement system of mathematics called Triliterasi. Measurement is a point with the help of reference points 3. Suppose you are in a city of A (here we regard the city as a point), but you do not know where you are. To know your existence, you ask someone, and the person answering that you are 2 km from the city of B. This answer did not satisfy you because you do not know whether you are in the south, north, west, or east of the city of B. Then you ask the people to-2 and get an answer that you are located 5 km from the town of C. With this answer you have to imagine where your position, there are only 2 points different possibilities that intersect the circle with a radius between city A to city B and the circle with a radius of a city with city C. To further clarify the more you mumerlukan to 3, for example you are in 1 km from the town D. Thus you get the intersection of the circle with a radius distance of the city A to B, the circle between city A and city C, and the circle of the city A and city D A town in GPS is the GPS receiver, the city B, C, and D is the satellite.
Benefits of GPS technology can be used to several areas including:
* Military
GPS can be used for war purposes, such as guiding the direction of the bomb, or know where the troops are. In this way we can find out where friends where your opponent to avoid the wrong target, or determine the movement of troops.
* Navigation
Many also use GPS navigation devices such as a compass. Several kinds of vehicles have been equipped with GPS for nivigasi tool, by adding a map, then it can be used to guide motorists, so motorists can see which path should be selected to achieve the desired objectives.
* Geographic Information System
GPS is often also involved in making maps, such as measuring the distance the border, or as a reference measurement.
* Vehicle Tracking
Other uses are as GPS vehicle tracking with the help of GPS vehicle owner / manager of the fleet could find anywhere keberaadaan vehicle / asset movement at this time.
* Monitor Earthquake
Even today, the GPS with high precision can be used to monitor the movement of soil, which ordenya mm in one year only. Monitoring land movements is useful for estimating the occurrence of an earthquake, either volcanic or tectonic movement.
from various sources
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