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
mini gps tracker.What should be noted when installing Beidou/GPS positioners on electric vehicles
Last article:GPS Plan implementation plan
Next article:Global Positioning System
Related Information
gps tracker with magnet wholesale
2023-03-16real-time gps tracking
2023-04-11Magnetic gps tracker Vendor
2023-04-23plug & play Obd gps tracker
2023-04-23OBD GPS Tracker
2023-04-11trailer gps tracker Factory
2023-04-23gps tracker for kids
2023-03-16airtag for dog
2023-03-16portable gps tracker wholesaler
2023-03-16fleet gps tracking manufacture
2023-04-23G183 serials -JOBD GPS Tracker
2022-09-06G06L- 4G Car GPS Tracker
2022-09-06TK100B- Accurate Pro version GT06/TK100
2023-10-06G200(L) -Magnet GPS Tracker
2022-06-20G08L - 4inch Smart Tail Light Tracker
2022-06-20Differences between GPS monitoring platform BS and CS
2022-12-14Handheld GPS navigation products will enter a period of rapid development.pet gps tracker cat wholes
2023-05-27Cantrack adding anti-theft alarm to G06L
2022-09-06Solar GPS positioning tracker solve worries
2023-02-23Introduction to GPS Positioning Principles.car gps tracker manufacture
2023-04-19Working principle of locator.vehicle gps tracker supplier
2023-07-19Everyone analyzes the concerns of buying a car GPS.gps tracker for trailer distributors
2023-05-09Vehicle GPS
2022-12-08Three Wiring Route Finding Methods for GPS Positioners
2023-06-27The GALILEO GPS system consists of 10 signals in four frequency bands.
2022-10-11GPS module with AGPS function
2022-10-12Comprehensive management of GPS satellite positioning and driver smart card for business and officia
2023-07-07The complete installation step of the wiring car GPS positioner
2023-03-28GPS Processor (GPSPU)
2022-09-05China Beidou Satellite Navigation System.obd11 gps tracker verizon manufacture
2023-03-11