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:
Last article:GPS signal receiver.car gps tracker
Next article:GPS predecessor.4G GPS Tracker
Related Information
gps vehicle tracker maker
2023-04-23portable gps tracker wholesaler
2023-03-16Portable car gps systems Manufacturing
2023-03-16fleet gps trackers supplier
2023-04-23simple gps tracking wholesale
2023-04-23plug & play Obd gps tracker
2023-04-234G GPS Tracker maker
2023-04-23real-time gps tracking Production
2023-04-23fleet gps trackers
2023-04-234G GPS Tracker Production
2023-04-23P60L Personal gps tracker
2022-06-21G07L 4G GPS Tracker
2022-09-06VSL100 GPS Speed Limiter, Speed Governor
2022-06-19GF20-Mini Magnet GPS Tracker
2022-06-21G500L -4G OBD GPS Tracker
2022-09-06Handheld GPS navigation products will enter a period of rapid development.
2022-07-13GPS predecessor
2023-06-01GPS coordinate
2022-11-23GPS network security ideas
2022-08-12Introduce how to use the car navigation instrument.gps tracker with magnet distributors
2023-05-10What are GPS satellite tracks?
2022-10-26Considerations for choosing a gps tracker
2022-09-13GPS positioning manufacturers introduce the composition of satellite positioning systems.Dog gps tra
2023-06-14Three Parts of GPS
2022-11-01gps vehicle tracker.The role of installing GPS satellite positioning devices in the sales and leasin
2023-10-27GPS vehicle tracking and dispatching function
2023-02-02Why does China's Beidou satellite still use GPS positioning system.gps tracker for trailer Factory
2023-09-12GPS reference standard.gps tracker online supplier
2023-07-20Introduction to GPS system functions
2022-11-11CDMA mobile phone GPS positioning
2022-10-21