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:
G183 serials -JOBD GPS Tracker
Xiaobian Xiaobian tells you the role of the truck installation of the Beidou positioning system.plug
Last article:GPS signal receiver.car gps tracker
Next article:GPS predecessor.4G GPS Tracker
Related Information
OBD GPS Tracker sales
2023-03-16mini gps tracker Manufacturing
2023-04-23gps vehicle tracker custom
2023-04-11Magnetic gps tracker
2023-03-16Gps speed limiter Vendor
2023-04-23Dog gps tracker wholesaler
2023-04-23Cantrack Login
2023-04-23cat gps tracker wholesaler
2023-04-23fleet gps trackers
2023-04-11GPS Tracker Solution
2023-04-11GF20-Mini Magnet GPS Tracker
2022-06-21G05N Vehicle Tracker
2022-06-21G08L - 4inch Smart Tail Light Tracker
2022-06-20GF30 Magnet GPS tracker with Voice listen
2022-06-21G07L 4G GPS Tracker
2022-09-06Two frequencies can eliminate ionizing layer errors.Portable car gps systems Manufacturing
2023-03-11GPS's current application scale and level
2023-02-16The conversion method of GPS coordinates in unit degrees and seconds
2022-10-12GPS monitoring system develops rapidly.Hidden GPS Trackers Manufacturing
2023-04-18GPS Beidou timing service accuracy can reach 10 nanoseconds
2022-08-11gps tracker is very power hungry?
2022-09-19What daily life can GPS vehicle positioning terminals be applied?
2023-04-03Application of GPS Positioning Technology in Network Security
2022-08-12CDMA mobile phone GPS positioning
2022-10-21gps vehicle tracker.How to Install the Beidou GPS Satellite Positioning and Monitoring System in Car
2023-11-02The principle of GPS indoor positioning technology
2022-08-12GPS road signs (Landmark Or Waypoint).gps tracker auto manufacturer
2023-06-10The obvious advantages of three generations of GPS products (actual effect)
2022-08-19mini gps tracker.Can car GPS locators be installed on motorcycles
2023-10-24GPS coordinate
2022-11-23