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锛?gps satellite constellation.gps vehicle tracker
Next article锛?GPS functions.Cantrack Login
Related Information
gps tracker online
2023-04-11gps tracker fur auto webfleet solutions
2023-03-16fleet gps trackers Production
2023-04-23GPS Tracking Manufacturing
2023-04-23gps vehicle tracker wholesale
2023-04-23obd2 gps tracker verizon
2023-04-11gps vehicle tracker distributors
2023-04-23Cantrack G05
2023-04-114G GPS Tracker
2023-04-11portable gps tracker distributors
2023-03-16G900LS-4G Car GPS Tracker
2023-10-06TK100 (GT06) Vehicle Tracker
2022-06-20G03
2022-06-21C32 (9~90V E-bikes/Motorcycle/Car gps tracker)
2022-06-21G09L -6 inch Tail light tracker
2022-06-20How to remove the car GPS location tracker
2022-08-05GPS power consumption and noise
2022-09-01ODM GPS Solution for Smart Wheelchair Project Launched!
2022-06-18Can a gps tracker be made smaller?
2022-07-16Can the car GPS locator be used indoors and underground parking lots?realtime gps tracker online Man
2023-03-25Introduce how to use wireless GPS locators
2023-06-27GPS clock.Dog gps tracker distributors
2023-07-18Global Positioning System Fix Data (GGA) GPS positioning information
2022-09-28Detailed introduction to the function of the car GPS positioner.gps tracker no monthly fee distribut
2023-03-10The Application of GPS Navigation System.plug & play Obd gps tracker Solution
2023-08-24GPS emergency positioning and assistance products for the elderly.4G GPS Tracker for vehicles distri
2023-08-17GPS alarm.4G GPS Tracker Manufacturing
2023-07-04GPS Common Functions.gps tracker no monthly fee Solution
2023-08-10Installation and Modeling Method of Large Vehicle GPS Positioning Fuel Consumption Sensor.trailer gp
2023-09-14GPS management system-efficient management of your vehicle
2023-02-16