source:truck tracking webfleet solutions release time:2022-10-12 Hits: Popular:realtime gps tracker online
GPS(also known as global navigation satellite system or global positioning system) the predecessor of the system for the United States military development of a meridian satellite positioning system (Transit), 1958 development, 1964 officially put into use. The system works with a network of five to six satellites that circumnavigate the Earth up to 13 times a day, and it does not give altitude information and is not very accurate in positioning. However, the meridional instrument system makes the R&D department get the preliminary experience of satellite positioning, and verifies the feasibility of positioning by satellite system, laying the groundwork for the development of GPS system. Because satellite positioning shows great superiority in navigation and meridian system has great defects in submarine and ship navigation. The U.S. Navy, army, air force and civilian sectors all feel the urgent need for a new satellite navigation system. To this end, the United States Naval Research Laboratory (NRL) proposed Tinmation with 12 to 18 satellites composed of 10,000 km high global positioning network plan, and in 67 years, 69 and 74 years each launched a test satellite, in these satellites on the initial test atomic clock timing system, which is the basis of GPS system accurate positioning. The U.S. Air Force proposed 621-B's plan of three to four clusters of four to five satellites per cluster. All but one of these satellites were in synchronous orbit, and all of them were in tilted orbit with a period of 24 hours. The plan was based on pseudo-random code (PRN) to transmit satellite ranging signals. Signal density is also detected when it is less than 1% of the ambient noise. The successful application of pseudorandom code is an important basis for the success of GPS system. The Navy's plan is designed to provide low-dynamic, 2-D positioning for ships, while the Air Force's plan is designed to provide high-dynamic services, but the system is too complex. Because the two systems at the same time development will cause huge cost, and here two plans are designed to provide global positioning, so in 1973 the United States department of defense will close 2 for one, the two joint projects agency (darpa), led by the Ministry of National Defense and satellite navigation and positioning (JPO) leadership, will also air force space agencies set up in Los Angeles. The agency has a large membership, including representatives of the U.S. Army, Navy, Marine Corps, Department of Transportation, Defense Mapping Agency, NATO and Australia.
Read recommendations:
GF30 Magnet GPS tracker with Voice listen
Last article:GPS Plan implementation plan
Next article:Global Positioning System
Related Information
gps vehicle tracker wholesale
2023-04-23Gps speed limiter distributors
2023-04-23Magnetic gps tracker sales
2023-04-23Gps speed limiter manufacture
2023-04-23personal gps tracker distributors
2023-04-11Car gps tracking distributors
2023-04-23GPS Tracker company
2023-04-114G GPS Tracker Factory
2023-04-23Gps speed limiter Factory
2023-04-23car gps tracker price
2023-04-11G05N Vehicle Tracker
2022-06-21C32 (9~90V E-bikes/Motorcycle/Car gps tracker)
2022-06-21personal gps tracker Production
2022-09-06G03
2022-06-21P60L Personal gps tracker
2022-06-21How GPS Works
2022-10-22What is the application range of the car positioner?realtime gps tracker online manufacturer
2023-03-09Security GPS Solution Introduction
2022-07-09Types of GPS Chips Used in Common GPS Receivers
2022-08-17Handheld GPS navigation products will enter a period of rapid development.
2022-07-13GPS Tracking Monitoring Promotes Mobile Logistics Management
2022-12-01Introduction to GPS Features
2022-09-23GPS development mode
2022-11-19What is the Galileo Plan?
2022-12-12Schematic diagram of GPS satellite navigation system
2022-12-29The development of electronic maps.personal gps tracker Manufacturing
2023-05-17The difference between GPS positioning and base station positioning.GPS Tracker for vehicles Process
2023-05-09What are the classification of GPS system.gps tracker no monthly fee wholesale
2023-04-21Accuracy of GPS
2022-12-28Application introduction in GPS Meteorology.obd2 gps tracker verizon Production
2023-05-06