source:truck tracking webfleet solutions release time:2023-09-04 Hits: Popular:realtime gps tracker online
The predecessor of the GPS (also known as the Global Satellite Navigation System or Global Satellite Positioning System) system was a transit satellite positioning system developed by the US military. It was developed in 1958 and officially put into use in 1964. The system operates on a satellite network consisting of 5 to 6 satellites, bypassing the Earth up to 13 times a day, and cannot provide altitude information, resulting in unsatisfactory positioning accuracy. However, the meridian system has enabled the research and development department to gain preliminary experience in satellite positioning and verified the feasibility of using satellite systems for positioning, laying the foundation for the development of GPS systems. Due to the enormous superiority of satellite positioning in navigation and the significant shortcomings of the meridian system in navigation for submarines and ships. The US military, land and air force, as well as the civilian sector, feel an urgent need for a new satellite navigation system. To this end, the US Navy Research Laboratory (NRL) proposed a global positioning network plan called Tinnation, which consists of 12 to 18 satellites at an altitude of 10000 kilometers. In 67, 69, and 74, one experimental satellite was launched, and the atomic clock timing system was initially tested on these satellites, which is the foundation of precise positioning of the GPS system. The US Air Force, on the other hand, proposed a plan for 621-B to consist of 3 to 4 star clusters consisting of 4 to 5 satellites per cluster. Except for one of these satellites using a synchronous orbit, all other satellites use a tilted orbit with a period of 24 hours. This plan uses pseudorandom code (PRN) as the basis for transmitting satellite ranging signals, and its powerful function can detect signals when the signal density is less than 1% of environmental noise. The successful application of pseudo random codes is an important foundation for the success of GPS systems. The Navy's plan is mainly used to provide low dynamic 2D positioning for ships, while the Air Force's plan can provide high dynamic services, but the system is too complex. Due to the significant cost involved in developing two systems simultaneously, and both of these plans were designed to provide global positioning, the US Department of Defense merged the two into one in 1973, led by the Joint Satellite Navigation and Positioning Program (JPO) led by the Department of Defense. The agency was also established at the Air Force Space Service in Los Angeles. The organization has a large number of members, including representatives from the US Army, Navy, Marine Corps, Department of Transportation, Defense Mapping Agency, NATO, and Australia.
Read recommendations:
vehicle gps tracker manufacturer
10000mAh Magnetic Asset GPS Tracker
What is the difference between the car GPS positioner and the car navigator?gps tracker für auto web
Last article:gps satellite constellation.gps vehicle tracker
Next article:GPS functions.Cantrack Login
Related Information
GPS Tracker for vehicles Manufacturing
2023-03-16fleet gps tracking wholesaler
2023-04-23personal gps tracker
2023-03-16gps vehicle tracker wholesale
2023-04-234G GPS Tracker company
2023-04-23obd-II port gps tracker
2023-04-23fleet gps trackers custom
2023-04-23simple gps tracking manufacturer
2023-04-23rastreador de GPS
2023-03-16Car gps tracking wholesale
2023-04-23VSL100 GPS Speed Limiter, Speed Governor
2022-06-19TK100N- Multi functional GPS Tracker
2023-10-06G900LS-4G Car GPS Tracker
2023-10-06Mini Sized GPS Tracker PCBA
2022-06-17NB20 -4G Bluetooth Smart Pet Tracker
2022-06-21GPS positioning principle
2022-10-14Introduction to GPS system functions
2022-11-11Why do the antennas need to be facing up when installing a GPS tracker?
2022-09-08GPS design idea and scheme
2022-11-18GPS vehicle dynamic monitoring sanitation vehicle operating supervision subsystem.gps tracker no mon
2023-04-07GPS Logistics Tracking and Monitoring Application Solution
2023-02-02Domestic product function
2022-11-01GPS monitoring information platform ensures smooth traffic
2022-12-17Several principles for car navigation purchase.plug & play Obd gps tracker supplier
2023-04-08Features of GPS
2023-02-17The editor of Beidou Tong introduced how to use the driving recorder.realtime gps tracker online who
2023-04-14GPS positioning logistics solutions Logistics GPS positioning application solutions
2022-10-09Anti -theft installation and operation introduction of automobile car GPS positioner.gps tracker no
2023-04-04The choice of GPS hardware architecture
2022-09-01What are the precautions for installing the car GPS positioner
2023-02-25