GPS

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위키데이터

• ID : Q18822

말뭉치

1. One way to track them would be to have a GPS receiver installed in the car!
2. Like so many other high-tech developments, GPS was designed by the U. S. military.
3. In 1989 the Magellan Corp. introduced the first hand-held GPS receiver.
4. In 1992 GPS was used in Operation Desert Storm.
5. Firstly, the signal of time is sent from a GPS satellite at a given point.
6. It is possible to calculate the position of the GPS receiver from distance from the GPS receiver to three satellites.
7. The Short Answer: GPS is a system of 30+ navigation satellites circling Earth.
8. A GPS receiver in your phone listens for these signals.
9. Today, all we need is a simple hand-held GPS (short for Global Positioning System) receiver to figure out exactly where we are anywhere in the world.
10. There’s a whole lot of important things GPS is used for—but perhaps nothing is more important than finding the quickest slice of pizza!
11. You can find GPS systems in your car, your smartphone and your watch.
12. GPS works through a technique called trilateration.
13. Satellites orbiting the earth send signals to be read and interpreted by a GPS device, situated on or near the earth’s surface.
14. A single satellite broadcasts a microwave signal which is picked up by a GPS device and used to calculate the distance from the GPS device to the satellite.
15. The GPS provides critical positioning capabilities to military, civil, and commercial users around the world.
16. The GPS project was started by the U.S. Department of Defense in 1973, with the first prototype spacecraft launched in 1978 and the full constellation of 24 satellites operational in 1993.
17. When selective availability was lifted in 2000, GPS had about a five-meter (16 ft) accuracy.
18. Special and general relativity predict that the clocks on the GPS satellites would be seen by the Earth's observers to run 38 microseconds faster per day than the clocks on the Earth.
19. GPS satellites circle the Earth twice a day in a precise orbit.
20. Each satellite transmits a unique signal and orbital parameters that allow GPS devices to decode and compute the precise location of the satellite.
21. GPS receivers use this information and trilateration to calculate a user's exact location.
22. Essentially, the GPS receiver measures the distance to each satellite by the amount of time it takes to receive a transmitted signal.
23. Do GPS devices show your home or business in the wrong place?
24. The Global Positioning System (GPS) is a U.S.-owned utility that provides users with positioning, navigation, and timing (PNT) services.
25. GPS satellites provide service to civilian and military users.
26. GPS is a space-based navigation system nominally consisting of a 24-satellite constellation that provides positioning and timing information to military and civilian users worldwide.
27. every 12 hours broadcast continuous GPS signals on two different L-band frequencies, L1 and L2.
28. The basic idea behind GPS to determine a user's location is relatively simple.
29. However, in the case of GPS, the obtained heights are references to the reference ellipsoid, not the geoid, known as the ellipsoidal heights.
30. " GPS is a satellite navigation system used to determine the ground position of an object.
31. GPS technology was first used by the United States military in the 1960s and expanded into civilian use over the next few decades.
32. The GPS system includes 24 satellites deployed in space about 12,000 miles (19,300 kilometers) above the earth's surface.
33. Each GPS satellite broadcasts a message that includes the satellite's current position, orbit, and exact time.
34. Sygic GPS, Navigation is the world’s most downloaded Offline GPS navigation app, trusted by more than 200 million drivers.
35. Offline 3D maps are stored on your phone for GPS navigation without an internet connection.
36. "GPS navigation" redirects here.
37. Today, most standalone GPS receivers are used in automobiles.
38. In 1973, the US military began to plan for a comprehensive worldwide navigational system which eventually became known as the GPS (global positioning system).
39. This new availability of the US military GPS system for civilian use required a certain technical collaboration with the private sector for some time, before it could become a commercial reality.
40. GPS, a satellite-based positioning system, is operated by the United States Department of Defense and was officially put into operation in 1995.
41. Assisted GPS (A-GPS) is mainly used in mobile terminals to enhance performance by means of faster localization (time to first fix, TTFF) and higher accuracy.
42. A-GPS uses the coordinates of the base station serving the radio cell in which the mobile terminal is located and transmits this information to the mobile terminal via an assisted channel.
43. An initial approximation of the position of the mobile terminal is possible, thus considerably shortening the time until exact GPS position data is available.
44. The GPS Block IIR(M) Satellite shown here is one of the various generations of GPS satellites orbiting the Earth.
45. GPS satellites fly in medium Earth orbit at an altitude of approximately 12,550 miles .
46. Today, all that's needed is a device called a GPS receiver.
47. The Global Positioning System (GPS) has been developed in order to allow accurate determination of geographical locations by military and civil users.
48. This may seem quite simple and the physical principles behind GPS are not difficult to understand.
49. The present GPS is based on a development programme that began in the early 1970's at the US Department of Defense.
50. Up to 30 GPS satellites fly, mostly in highly inclined (polar) orbits, at altitudes around 20,000 km.
51. For GPS units to properly locate your position, this requires the three components: space segment, control section and user segment to work in sync with one another.
52. “There is a growing recognition of the need to protect, toughen, and augment GPS,” says Todd Humphreys, a communications engineer at the University of Texas, Austin.
53. GPS now underpins a surprising amount of our everyday lives.
54. In its simplest form it tells us where on Earth at any time a GPS receiver is.
55. Mobile phone networks all use GPS time to synchronise their base stations, while financial and banking institutions rely upon it to ensure trades and transfers occur correctly.
56. You might even hike with a GPS device to find your way through the backcountry.
57. GPS consists of a constellation of satellites that send signals to Earth’s surface.
58. A basic GPS receiver, like the one in your smartphone, determines where you are—to within about 1 to 10 meters—by measuring the arrival time of signals from four or more satellites.
59. GPS receivers, scientists can pinpoint their locations down to centimeters or even millimeters.
60. Perhaps most important, GPS III satellites will be harder to jam—either by accidental transmissions or by enemies.
61. While GPS was initially conceived to aid navigation, globally synchronized time is now a much more critical function of the system.
62. Telecom networks rely on GPS clocks to keep cell towers synchronized so calls can be passed between them.
63. The finance sector uses GPS-derived timing systems to timestamp ATM, credit card, and high-speed market transactions.
64. are spoofers: systems that get GPS receivers to lock on to mimicked signal.
65. Global Positioning System was developed by the United States' Department of Defense.
66. This enables GPS receivers to determine their current location, time and velocity.
67. GPS is often used by civilians as a navigation system.
68. On the ground, any GPS receiver contains a computer that "triangulates" its own position by getting bearings from at least three satellites.
69. GPS mapping is standard equipment in many new cars and geolocation services are embedded in smart phones.
70. GPS makes Uber and Lyft possible; driverless cars won't be able to drive without it.
71. GPS relays precise time and positioning information from orbiting satellites to receivers on the ground, at sea, and in the air.
72. Ceruzzi recounts the origins of GPS and its predecessor technologies, including early aircraft navigation systems and satellites.
73. Global Positioning System (GPS) is a worldwide radio-navigation system formed from the constellation of 24 satellites and their ground stations.
74. The Global Positioning System is mainly funded and controlled by the U.S Department of Defense (DOD).
75. Global Positioning System tracking is a method of working out exactly where something is.
76. A GPS tracking system, for example, may be placed in a vehicle, on a cell phone, or on special GPS devices, which can either be a fixed or portable unit.
77. GPS is a satellite-based radionavigation system developed and operated by the U.S. Department of Defense (DOD).
78. The monitor stations track all GPS satellites in view and collect ranging information from the satellite broadcasts.
79. The GPS concept of operation is based upon satellite ranging.
80. Each GPS satellite transmits an accurate position and time signal.
81. The Global Positioning System IIF is a current iteration of the GPS satellite, which Boeing began building in 1978.
82. The company has constructed more than 40 GPS satellites that cumulatively have provided more than 540 years of on-orbit service.
83. GPS satellites orbit some 12,000 miles above the Earth and comprise a worldwide timing and navigation system.
84. GPS has become an integral part of technology that has improved commerce, travel, safety and the lives of billions of people around the world.
85. (PNT) systems continued to be available in the absence of GPS.
86. These survey cluster coordinates are collected in the field using GPS receivers, usually during the survey sample listing process.
87. In order to ensure that respondent confidentiality is maintained, we randomly displace the GPS latitude/longitude positions for all surveys, including those that do not have HIV testing.
88. For clusters without GPS readings, other means are used to determine the coordinates.
89. The source of the coordinates (GPS, map, gazetteer) is reported in the geographic data file that is released to the public.
90. Therefore, most GPS receivers will displaying their current latitude and longitiude.
91. GPS satellites circle the earth twice a day in a very precise orbit and transmit signal information to earth.
92. GPS receivers take this information and use triangulation to calculate the user's exact location.
93. Essentially, the GPS receiver compares the time a signal was transmitted by a satellite with the time it was received.
94. The time difference tells the GPS receiver how far away the satellite is.

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위키데이터

• ID : Q18822