source:truck tracking webfleet solutions release time:2023-08-19 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. The positioning accuracy is also unsatisfactory. 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 program 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 preliminarily tested on these satellites, which is the foundation of precise positioning of GPS systems. 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:
What is the best GPS tracker to choose?
How to choose the antenna module of the car GPS positioner?Best hidden gps trackers
Last article:Second generation satellite navigation system in the United States.4G GPS Tracker for vehicles manuf
Next article:The implementation of the PS plan is divided into three stages.plug & play Obd gps tracker whole
Related Information
fleet gps tracking wholesale
2023-04-23GPS Tracker
2023-04-11car gps tracker
2023-04-11Gps speed limiter Production
2023-04-23fleet tracking mobile app
2023-03-16Gps speed limiter Factory
2023-04-23fleet gps tracking
2023-04-11Magnetic gps tracker
2023-03-164G GPS Tracker
2023-04-11Magnetic gps tracker sales
2023-04-236000mAh Magnetic Asset GPS Tracker
2025-03-31G900LS 8 Lines-4G Car GPS Tracker
2025-03-3110000mAh Magnetic Asset GPS Tracker
2025-04-08GF70L-Solar Magnetic Asset GPS Tracker
2023-10-07G06L
2022-06-21Application of GPS in Car Tracker
2022-09-26Design of GPS Vehicle Satellite Positioning Simulation System
2022-12-06GPS vehicle autonomous navigation system has the following functions
2022-08-05Brief analysis of problems and solutions of vehicle location tracker.realtime gps tracker online Pro
2023-03-13How accurate is GPS positioning?
2022-10-26Development Trend of Automobile GPS Positioning System
2022-12-07The implementation of the PS plan is divided into three stages.plug & play Obd gps tracker whole
2023-08-19Application in emergencies GPS.plug & play Obd gps tracker Production
2023-05-06Types of GPS
2022-09-24GPS application layer.plug & play Obd gps tracker wholesale
2023-08-16Vehicle trajectory knowledge of vehicle GPS positioner popularization.gps tracker no monthly fee
2023-03-22The current status and development trend of China's car navigation industry.gps tracker for trailer
2023-05-17Does the GPS positioner consume a lot of power?gps tracker no monthly fee wholesaler
2023-04-07Whether GPS positioning is GPS navigation.obd-II port gps tracker manufacture
2023-05-09Six characteristics of GPS
2022-10-12