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:
The difference between manufacturers compare the Beidou satellite navigation system and GPS navigati
Beidou Satellite Positioner Function.metal spring buckle Factory
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
gps tracker for Car
2023-04-11GPS Tracker wholesaler
2023-03-16pet gps tracker cat sales
2023-03-16fleet gps trackers
2023-04-23car gps tracker Processing
2023-04-23Best hidden gps trackers
2023-03-16apple airtags
2023-03-16gps tracker for kids
2023-04-11mini gps tracker wholesale
2023-04-23trailer gps tracker custom
2023-04-23TK100B- Accurate Pro version GT06/TK100
2023-10-06TK100 (GT06) Vehicle Tracker
2022-06-2010000mAh Magnetic Asset GPS Tracker
2025-04-083 Years Disposable Asset GPS Tracker
2025-03-31NB20 -4G Bluetooth Smart Pet Tracker
2022-06-21GPS buying points.gps tracker with magnet Vendor
2023-06-09Application in emergencies GPS.plug & play Obd gps tracker Production
2023-05-06GPS is classified by the working principle of the receiver.obd2 gps tracker verizon sales
2023-06-05System Composition of GPS PPS Clock Synchronization Technology
2022-11-11GPS locators can be used as a source of real-time information on road conditions
2022-07-19Scope of GPS.plug & play Obd gps tracker Vendor
2023-09-09GPS automatic navigation.obd2 gps tracker verizon distributors
2023-05-17The relationship between GPS and Beidou navigation?Asset tracking wholesaler
2023-02-18A-GPS and GPRS
2022-12-08The significance of GPS positioning technology in the construction machinery industry.obd2 gps track
2023-03-16Car GPS one click alarm.fleet gps tracking Solution
2023-07-21What is the best type of strong magnetic wireless car GPS locator?fleet gps tracking
2023-09-05What are the commonly used car GPS positioner?
2023-02-25gps vehicle tracker.What are the installation requirements for GPS locators reflected in
2023-10-17Where are car mounted GPS locators usually installed.mini gps tracker distributors
2023-06-25