source:truck tracking webfleet solutions release time:2023-11-09 Hits: Popular:realtime gps tracker online
The concept of GPS originated from the space race during the Cold War, when scientists tracked the position of satellites through changes in the "Doppler effect" of radio signals. The US Navy conducted satellite navigation tests in the mid-1960s to provide positioning services for US submarines equipped with nuclear missiles. Through six polar satellites, submarines are able to capture Doppler signals from satellites and determine their position within minutes, which is the precursor of GPS.
In the early 1970s, the US Department of Defense wanted to have a powerful and stable satellite navigation system, and based on the previous ideas of naval scientists, decided to use satellites to build the navigation system. Subsequently, in 1978, the United States Department of Defense launched the first navigation satellite with timing and ranging functions. The entire GPS system 2 was deployed as a constellation in 1994 and put into full operation and service.
Today, there are 32 GPS satellites in operation, covering the Earth and affecting every aspect of our lives. GPS currently provides two levels of services, namely the Standard Positioning Service (SPS) using coarse acquisition (C/A) codes on the L1 frequency, and the Precision Positioning Service (PPS) using P (Y) codes on both L1 and L2 frequencies. The use of precision positioning services is strictly restricted by the United States Air Force, federal agencies, and some allied armed forces and governments. All users worldwide can continuously use standard positioning services without charging any fees to direct users.
With the advancement of technology, the US government is also modernizing and updating its GPS satellite system. Currently, we are attempting to add two civilian signal channels to the GPS signal, 1) adding the second civilian signal L2C of 1227.60MHz to the GPSL2 frequency to meet the needs of high-precision scientific applications; 2) Add a third civilian signal L5 with a frequency of 1176.45MHz to meet the critical life and production safety needs of civil aviation and other industries. In addition, it is also planned to add the fourth civilian signal L1C to the GPS signal to achieve interoperability with other GNSS systems, such as Galileo from the European Union and GLONASS from Russia. This fourth signal will be added to the GPSBlock III satellite and is currently under development. GPS will be the main wireless navigation system provided by the US federal government and will be expanded and improved to meet future requirements for navigation positioning accuracy, coverage, availability, continuity, and integrity.
Read recommendations:
Introduction to GPS Positioning Principles.gps tracker no monthly fee Processing
Last article:Gps speed limiter.Who invented GPS? People behind the Global Positioning System
Next article:Gps speed limiter.The significance of installing GPS positioning system in automobile delivery vehic
Related Information
apple airtags
2023-03-16fleet gps trackers
2023-04-11gps vehicle tracker Solution
2023-04-23Dog gps tracker
2023-04-11GPS Tracker Solution
2023-04-11Dog gps tracker Vendor
2023-03-16Gps speed limiter Processing
2023-04-234G GPS Tracker for vehicles wholesaler
2023-04-23GPS Tracker Vendor
2023-04-11pet gps tracker cat manufacturer
2023-03-16TK08A Motorcycle GPS Tracker
2022-06-20G07L 4G GPS Tracker
2022-09-06G200(L) -Magnet GPS Tracker
2022-06-20G08L - 4inch Smart Tail Light Tracker
2022-06-20TK100 (GT06) Vehicle Tracker
2022-06-20What are the elements of buying a driving recorder.gps tracker no monthly fee wholesale
2023-05-09Actual demand and development trend of GPS market
2022-12-22Car GPS positioning system.portable gps tracker Vendor
2023-05-26Is GPS really powerful?
2023-02-14Surgical characteristics of the new technology GPS scheme
2022-10-15GPS increases value for customers
2023-02-02What should I do if the GPS positioning display is offline?gps tracker for bike Factory
2023-09-16How to effectively control the risk of car loan companies?
2023-02-16Auto mobile monitoring composition.vehicle gps tracker Manufacturing
2023-05-19The Application of GPS Navigation System in Road Engineering.4G GPS Tracker for vehicles equipment
2023-08-24Vehicle Management System Based on Differential GPS Technology
2022-12-20Comprehensive management of GPS satellite positioning and driver smart card for business and officia
2023-07-07How to maintain the GPS locator of the car.gps tracker with magnet Manufacturing
2023-03-28How to maintain and maintain GPS locators.gps vehicle tracker
2023-10-07mini gps tracker.What is the principle of GPS
2023-11-16