Global positioning system GPS 4 [] or (English: Global Positioning System:GPS) is the system the location on the earth's surface. Based on the calculation of clock frequency sent from orbiting satellites around the earth, which know difficultly. Make this system can tell the position at the point it can get the signal around the world.The new will calculate the speed and direction is used together with the program map for use in การนำทางได้
.
development of GPS system. Starting from 1975.1957 when scientists of the United States. Track delivery of Soviet Sputnik And found ปรากฏการณ์ดอปเปลอร์ of radio waves transmitted from the satellite. They found that if knowing the exact location on the earth's surface.And if the exact location of the satellite. It can identify locations on earth, on the other hand,
.
US Navy experimental satellite navigation system with the name TRANSIT is the first when in 1960 consists of 5 satellite sun. The satellites used in GPS system (GPS Block-I) sent up for the first time when 1978 experimental architecture for use in military
.
when.1983 after what happened to Korean Air Lines flight 007 of South Korea. Fly strayed into Soviet airspace and was shot down, the passengers 269 died, President Ronald Reagan announced thatTo allow the general public to use
.
satellite GPS satellites with a medium earth orbit (Medium Earth Orbit: MEO) at an altitude of about, 20 200 kilometres (12 600,, Miles, or 10900 nautical miles) from earth, used to confirm the coordinates of satellites at least 4 stars. The satellite will orbit the earth for 4-8 hours per round, the speed 4 km / sec. Orbital each round can be 6 plane, 4.Angle 55 degrees by the whole system must have a satellite 24 loved or more in order to confirm the ตำแหน่งได้ cover all the points on the earth's surface. A satellite GPS Block-II satellite reserve about 4-6 reserve satellites.
การแปล กรุณารอสักครู่..