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:
personal gps tracker Production
The functions of intelligent GPS.vehicle gps tracker webfleet solutions
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
obd-II port gps tracker
2023-04-234G GPS Tracker sales
2023-04-23Gps speed limiter maker
2023-04-23gps tracker for kids
2023-04-11personal gps tracker distributors
2023-03-16Dog gps tracker maker
2023-04-23real-time gps tracking company
2023-04-23fleet gps trackers wholesale
2023-04-234G GPS Tracker for vehicles
2023-03-16fleet gps tracking Solution
2023-04-23G06L
2022-06-21TK103B
2022-06-20G200NY -Cow/Camel GPS Tracker
2022-06-21TK100N- Multi functional GPS Tracker
2023-10-06G02M Pet Tracker
2022-06-19The obvious advantages of three generations of GPS products (actual effect)
2022-08-19GPS, get closer to our lives
2023-02-08Car GPS Navigation System Operation
2022-11-04Why does my country participate in the "Galileo" plan
2023-02-11How to prevent the car positioning system from being destroyed.plug & play Obd gps tracker Solut
2023-05-09Requirements for logistics tracking and monitoring
2022-12-01GPS user equipment
2023-06-01GPS positioning mode
2022-10-22Two frequencies can eliminate ionizing layer errors.Portable car gps systems Manufacturing
2023-03-11GPS selection.Hidden GPS Trackers wholesale
2023-06-28The reason why it is an important navigation that it is inseparable.realtime gps tracker online Prod
2023-04-25Gps speed limiterDoes the ultra small button type GPS locator exist
2023-10-24GPS system functions
2022-11-09The choice of GPS hardware architecture
2022-09-01Here, I want to talk about how to use the GPS receiver practically.
2022-11-26