source:truck tracking webfleet solutions release time:2023-09-04 Hits: Popular:realtime gps tracker online
A GPS satellite constellation consisting of 21 working satellites and 3 in orbit backup satellites is referred to as the (21+3) GPS constellation. 24 satellites are evenly distributed within 6 orbital planes, with an inclination angle of 55 degrees. The distance between each orbital plane is 60 degrees, which means that the right ascension of the ascending node of the orbit is 60 degrees apart. The difference in elevation angle between satellites in each orbital plane is 90 degrees. A satellite in the orbital plane is 30 degrees ahead of the corresponding satellite in the adjacent orbital plane to the west.
GPS satellites at an altitude of 20000 kilometers orbit the Earth twice when the Earth rotates around a star, and the time it takes to orbit the Earth once is 12 star hours. This way, ground observers will see the same GPS satellite 4 minutes in advance every day. The number of satellites located above the horizon varies with time and location, with a minimum of 4 visible and a maximum of 11 visible. When using GPS signal navigation and positioning, in order to calculate the three-dimensional coordinates of the station, four GPS satellites must be observed, which are called positioning constellations. The geometric position distribution of these four satellites during the observation process has a certain impact on the positioning accuracy. The time period during which precise point coordinates cannot even be measured at a certain location or time is called a "gap period". But this time gap is very short and does not affect the all-weather, high-precision, and continuous real-time navigation and positioning measurements in the vast majority of parts of the world. The number of GPS working satellites is basically the same as the test satellite.
Read recommendations:
real-time gps tracking company
personal gps tracker Production
GPS car driving recorder escorts safe driving
V2V technology combined with GPS technology and wireless communication technology
Last article:GPS signal receiver.car gps tracker
Next article:GPS predecessor.4G GPS Tracker
Related Information
gps vehicle tracker wholesaler
2023-04-23mini gps tracker manufacturer
2023-04-23real-time gps tracking distributors
2023-04-23gps vehicle tracker Processing
2023-04-11Car gps tracking Processing
2023-04-23fleet gps trackers Processing
2023-04-23GPS Tracker sales
2023-04-114G GPS Tracker price
2023-04-23simple gps tracking wholesaler
2023-04-23Magnetic gps tracker distributors
2023-03-16G06L- 4G Car GPS Tracker
2022-09-06C32 (9~90V E-bikes/Motorcycle/Car gps tracker)
2022-06-21TK200AM-Disposable GPS Tracker
2022-06-21NB20 -4G Bluetooth Smart Pet Tracker
2022-06-21G07L 4G GPS Tracker
2022-09-06GPS vehicle autonomous navigation system has the following functions
2022-08-05Design of GPS Vehicle Satellite Positioning Simulation System
2022-12-06What is the difference between the Internet of Things card or mobile phone SIM card used?truck track
2023-03-23GPS positioner function.realtime gps tracker online wholesale
2023-04-07Do gps trackers consume data?
2022-09-16GPS Starry Structure and Solving Process
2023-02-10GPS positioning system development trend
2023-02-07What are the cases of GPS positioner?gps tracker no monthly fee manufacturer
2023-03-28Working principle of locator.vehicle gps tracker supplier
2023-07-19GPS's military development introduction.obd2 gps tracker verizon Manufacturing
2023-05-06What kind of gps tracker is easy to use?
2022-09-08Global Positioning System
2022-10-12The Application of GPS Navigation System in Road Engineering.4G GPS Tracker for vehicles equipment
2023-08-24Vehicle Management System Based on Differential GPS Technology
2022-12-20GPS Navigation receiver
2023-06-02