source:Industry News release time:2022-11-08 Hits: Popular:realtime gps tracker online
For C/A code, the navigation signal is composed of 25 frames of data, and each frame contains 1500 bits [2]. In addition, each frame can be divided into five groups of 300 bit sub frames. When the receiver captures the C/A code, it will take 6 seconds to capture a subframe, that is, it must take 30 seconds for a frame. Please note that only some more in-depth measurement operations can actually take 30 seconds to capture the complete framework; We will discuss it later. In fact, 30 seconds is only the average shortest time to capture a complete frame; The first positioning time (TTFF) of the system usually exceeds 30 seconds.
In order to perform positioning operations, most receivers must update the information of the satellite ephemeris (Almanac) and ephemeris (Ephemeris). This information is contained in the signal data transmitted by the satellite, and each subframe also contains a dedicated information set. In general, we can identify the information contained in the subframe through its categories [2] [7]:
Sub frame 1: Including clock correction, accuracy, and satellite operation
Sub frame 2-3: contains accurate orbital parameters, which can calculate the exact position of the satellite
Sub frames 4-5: contains rough satellite orbit data, timing correction, and operation information.
The receiver must use the information of satellite ephemeris and ephemeris to perform positioning operation. Once the exact distance of each group of satellites is obtained, the high-order GPS receiver will return the position information through a simple triangulation algorithm. In fact, if the information of Pseudorange and satellite position can be integrated, the receiver can accurately identify its position.
Read recommendations:
VSL100 GPS Speed Limiter, Speed Governor
The working principle and equipment composition of the GPS positioning management system.obd-II port
Last article:Composition and characteristics of GPS system
Next article:Mobile GPS data processing
Related Information
vehicle gps tracker webfleet solutions
2023-04-11Magnetic gps tracker supplier
2023-04-23GPS Tracking Manufacturing
2023-04-234G GPS Tracker for vehicles maker
2023-04-234G GPS Tracker for vehicles company
2023-04-23Gps speed limiter manufacture
2023-04-23portable gps tracker wholesaler
2023-03-16Pet GPS Tracker distributors
2023-03-16fleet gps tracking Processing
2023-04-23pet gps tracker cat distributors
2023-03-16C32Plus (9~90V E-bikes/Motorcycle/Car gps tracker)
2022-06-21G03
2022-06-21G500M-Mini GPS Tracker
2022-06-20Mini Sized GPS Tracker PCBA
2022-06-17G900LM-4G Car Mini GPS Tracker
2025-03-25GPS performance indicators
2022-12-07How to realize the function of GPS monitoring system?
2022-12-12locator gps car tracker
2022-08-09China Beidou Satellite Navigation System.obd11 gps tracker verizon manufacture
2023-03-11Auto GPS information and mobile phone interconnection.gps tracker no monthly fee Factory
2023-05-18Several Important Factors of Vehicle GPS Satellite navigation.personal gps tracker supplier
2023-06-16The difference between GPS positioning and mobile positioning.obd2 gps tracker verizon manufacture
2023-08-03The development of GPS system
2022-10-12What should I do if the position of the car's GPS positioning system is incorrect?real-time gps trac
2023-09-19GPS principle
2023-06-02GPS navigation all-in-one machine.Pet GPS Tracker distributors
2023-07-18How to do car GPS positioning in a car rental company.obd2 gps tracker verizon distributors
2023-03-16Characteristics of GPS RTKLIB.fleet gps trackers wholesaler
2023-07-03gps vehicle tracker.The role of Beidou and GPS satellite vehicle positioning systems in transportati
2023-10-14What kind of gps tracker is easy to use?
2022-09-08