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:
Last article:gps satellite constellation.gps vehicle tracker
Next article:GPS functions.Cantrack Login
Related Information
mini gps tracker Production
2023-04-23OBD GPS Tracker Vendor
2023-03-16GPS Trackers price
2023-04-11Car gps tracking wholesaler
2023-04-23fleet gps trackers Processing
2023-04-23cat gps tracker wholesaler
2023-04-23fleet gps trackers price
2023-04-23mini gps tracker Solution
2023-04-23real-time gps tracking Solution
2023-04-23gps tracker online wholesale
2023-04-23G05N Vehicle Tracker
2022-06-21G183 serials -JOBD GPS Tracker
2022-09-06G200NY -Cow/Camel GPS Tracker
2022-06-21G09L -6 inch Tail light tracker
2022-06-20G02M Pet Tracker
2022-06-19Types of GPS Chips Used in Common GPS Receivers
2022-08-17GPS indoor positioning application
2023-02-15The correct way to use a GPS receiver in the field
2022-08-16The composition of GPS system
2022-08-08The advantage of mobile phone GPS navigation.GPS Tracker for vehicles Production
2023-05-09Overview of GPS Vehicle System.portable gps tracker price
2023-08-11GPS mobile phone positioning characteristics
2022-10-21Can the GPS positioning system help the breeding industry save costs?
2023-02-22The role of truck installation of Beidou positioning system.obd-II port gps tracker distributors
2023-04-10The manufacturer shared the function of GPS navigation with everyone.gps tracker with magnet price
2023-06-17What factors can interfere with the signal of a car GPS locator.simple gps tracking
2023-09-18Structure of GPS antenna
2022-11-12GPS installation precautions.mini plastic buckles custom
2023-06-06GPS vehicle dynamic monitoring sanitation vehicle operating supervision subsystem.gps tracker no mon
2023-04-07Gps speed limiter.GLONASS Satellite Navigation System
2023-10-11