source:truck tracking webfleet solutions release time:2023-11-14 Hits: Popular:realtime gps tracker online
GPS satellites broadcast radio frequency signals at two carrier frequencies; L1 (1575.42 MHz) and L2 (1227.60 MHz). The beams that can be used by the general public are encoded using C/A (rough/acquisition) codes, while beams used solely by the US military are encoded using P (precise) codes.
The C/A code includes the identification codes and navigation messages of each satellite. The L1 signal from the GPS satellite is phase modulated using C/A code. C/A code is a digital signal in which 0 and 1 are encoded by 1023 consecutive digital pulse patterns. The navigation message consists of 25 frames, each with 5 subframes of 300 bits. Therefore, each frame has 1500 bits (0 and 1). The data length of each bit is 20 milliseconds (i.e., the total pulse width of a C/A signal of one bit is 20 milliseconds).
The orbital data of each satellite is called an ephemeris. This data is used to generate the precise position of the satellite, which is required for the GPS receiver to calculate position information. The orbital data of all satellites is called the almanac. It includes rough orbit and status information of all satellites in the network. This data is used to locate available satellites for the GPS receiver so that it can find their current time and position on Earth.
Read recommendations:
GPS DOP and Active Satellites (GSA)
What are the advantages of 4G positioner.realtime gps tracker online Production
Last article:mini gps tracker.Introduction to the main functions of enterprise users choosing car GPS satellite p
Next article:mini gps tracker.GPS positioning
Related Information
obd2 gps tracker verizon wholesale
2023-03-164G GPS Tracker for vehicles company
2023-04-23car gps tracker
2023-04-114G GPS Tracker for vehicles wholesale
2023-04-23gps tracker for trailer
2023-04-11GPS Trackers company
2023-04-11pet gps tracker cat manufacture
2023-03-164G GPS Tracker manufacturer
2023-04-23gps tracker for kids
2023-04-11mini gps tracker supplier
2023-04-23Mini Sized GPS Tracker PCBA
2022-06-17G183 serials -JOBD GPS Tracker
2022-09-06G09L -6 inch Tail light tracker
2022-06-20G01 Smallest Personal Old People Mini GPS Tracker for Kids
2022-06-19G06L- 4G Car GPS Tracker
2022-09-06High precision timing system based on GPSD
2022-11-18GPS tracker is forced to have a relationship with car loan risk control!
2022-07-19how to disable vehicle gps location
2022-08-05GPS signal acquisition unit
2022-11-10Where is the product advantage of the GPS positioner
2023-03-06The working principle and equipment composition of the GPS positioning management system.obd-II port
2023-05-06Navigator classification.Mouth and word buckle price
2023-06-06Bluetooth GPS technology
2022-10-19The GPS implementation plan has three phases
2022-10-13Automatic optimization and scheduling function of mining GPS positioning system.Gps speed limiter
2023-10-07What is the difference between the car GPS positioner and the car navigator?gps tracker für auto web
2023-03-21GPS application
2023-06-02Development Trend of Automobile GPS Positioning System
2022-12-07How to realize the function of GPS monitoring system?
2022-12-12Beidou Satellite Positioner.hang tag button manufacture
2023-06-06