source:Industry News release time:2023-06-20 Hits: Popular:realtime gps tracker online
24 GPS satellites orbit the Earth at an altitude of 22000 kilometers above the ground in a 12 hour cycle, allowing for simultaneous observation of more than 4 satellites at any point on the ground at any time. Due to the precise location of satellites, in GPS observation, we can obtain the distance from the satellite to the Beidou position reporting machine. Using the distance formula in three-dimensional coordinates and using three satellites, we can form three equations to solve the positions of observation points (X, Y, Z). Considering the error between the satellite clock and the receiver clock, there are actually four unknowns, X, Y, Z, and clock difference. Therefore, a fourth satellite needs to be introduced to form four equations for solving, in order to obtain the longitude, latitude, and elevation of the observation point.
In fact, the Beidou position reporting terminal can often lock in more than 4 satellites. At this time, the Beidou position reporting terminal can be divided into several groups according to the constellation distribution of the satellites, with 4 satellites in each group. Then, the algorithm selects the group with the smallest error for positioning, thereby improving accuracy.
Due to the errors in satellite operation orbit and satellite clock, the influence of atmospheric troposphere and ionosphere on signals, and the artificial SA protection policy (cancelled on May 1, 2000), the positioning accuracy of civil GPS is only 100 meters. To improve positioning accuracy, differential GPS (DGPS) technology is commonly used to establish a reference station (differential station) for GPS observation. The known accurate coordinates of the reference station are compared with the observed values to obtain a correction number, which is then published to the public. After receiving the correction, the Beidou position reporting machine compares it with its own observation values, eliminates most of the errors, and obtains a more accurate position. Experiments have shown that using differential GPS can improve positioning accuracy to 5 meters
Read recommendations:
Last article:What are the functions of car GPS locators.obd-II port gps tracker maker
Next article:Introduction to GPS Positioner.gps tracker device Production
Related Information
Dog gps tracker Production
2023-04-23pet gps tracker cat Vendor
2023-03-16mini gps tracker Factory
2023-04-23realtime gps tracker online
2023-04-11cat gps tracker sales
2023-04-11Gps speed limiter equipment
2023-04-23gps tracker for bike supplier
2023-04-23fleet gps tracking Solution
2023-04-23Gps speed limiter maker
2023-04-23Dog gps tracker Vendor
2023-04-236000mAh Magnetic Asset GPS Tracker
2025-03-31TK100N- Multi functional GPS Tracker
2023-10-06Mini Sized GPS Tracker PCBA
2022-06-17G183 serials -JOBD GPS Tracker
2022-09-06TK103B
2022-06-20GPS active ranging and passive range.car gps tracker Solution
2023-04-19GPS installation points
2022-10-08Application of GPS in Logistics Industry
2022-07-11GPS positioning tracker function
2022-12-15Types of GPS Chips Used in Common GPS Receivers
2022-08-17GPS area measuring instrument.trailer gps tracker supplier
2023-07-19The function of the car GPS.gps tracker no monthly fee wholesaler
2023-05-13Classification of GPS antenna
2022-11-12GPS uses traditional paper maps to find its location.realtime gps tracker online manufacturer.obd2 g
2023-04-13Introduction to GPS Watch.4G GPS Tracker for vehicles Solution
2023-08-09With GPS positioning function, police smart clothing becomes a good helper for Expo security
2022-09-06The difference between the Beidou satellite positioning system and the Beidou navigation system.plug
2023-05-06The advantage of mobile phone GPS navigation.GPS Tracker for vehicles Production
2023-05-09GPS area measuring instrument.car gps tracker distributors
2023-07-19What are the differences between car GPS positioning and mobile phone GPS positioning?plug & pla
2023-03-17