source:truck tracking webfleet solutions release time:2023-06-01 Hits: Popular:realtime gps tracker online
The predecessor of the GPS system was a transit satellite positioning system developed by the US military, which was developed in 1958 and officially put into use in 64. 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 the fact that both programs 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:
The purpose and prospect of the GPS vehicle management system.rastreadores gps wholesaler
Detailed introduction to the function of the car GPS positioner.gps tracker no monthly fee distribut
Last article:Handheld GPS navigation products will enter a period of rapid development.pet gps tracker cat wholes
Next article:GPS space and ground control
Related Information
gps tracker with magnet
2023-04-11pet gps tracker cat Solution
2023-03-16Dog gps tracker Vendor
2023-04-234G GPS Tracker for vehicles distributors
2023-04-23real-time gps tracking
2023-03-16Pet GPS Tracker supplier
2023-03-16fleet gps trackers Processing
2023-04-23GPS Tracking Manufacturing
2023-04-23car gps tracker Vendor
2023-04-23real-time gps tracking manufacture
2023-04-23G07L 4G GPS Tracker
2022-09-06G183 serials -JOBD GPS Tracker
2022-09-06G500M-Mini GPS Tracker
2022-06-20G03
2022-06-21G01 Smallest Personal Old People Mini GPS Tracker for Kids
2022-06-19The editor of Beidou Tong introduced how to use the driving recorder.realtime gps tracker online who
2023-04-14China Beidou will provide positioning and alarm services to the world
2023-02-15What are the functions of a car navigator?gps tracker no monthly fee wholesale
2023-04-11How to use the car GPS navigator.realtime gps tracker online Vendor
2023-05-19Signal from GPS receiver
2022-11-08How to prevent the car positioning system from being destroyed.plug & play Obd gps tracker Solut
2023-05-09Several ways of GPS mobile phone positioning
2022-10-21Analysis of the Requirements and Functions for Installing GPS Positioners on Official Vehicles of Un
2023-09-22Several Important Factors of Vehicle GPS Satellite navigation.personal gps tracker supplier
2023-06-16Principles of GPS system positioning.Magnetic gps tracker company.gps tracker for Car supplier
2023-07-13Features and functions of in car GPSD
2023-07-27Main Errors and Elimination Algorithms in GPS Positioning
2022-09-06GPS RTK principle.gps tracker for kids company
2023-07-03Theoretical Basis of GPS Vehicle Satellite Positioning
2022-08-24The GPS system consists of three parts
2022-12-06