source:truck tracking webfleet solutions release time:2022-09-22 Hits: Popular:realtime gps tracker online
The user part of GPS consists of GPS receiver, data processing software and corresponding user equipment such as computer meteorological instruments. Its function is to receive signals from GPS satellites and use these signals for navigation and positioning. The above three parts together form a complete GPS system.
GPS satellites transmit carrier signals of two frequencies, namely the L1 carrier with a frequency of 1575.42MHz and the L2 carrier with a frequency of 1227.60HMz. Their frequencies are 154 times and 120 times that of the fundamental frequency of 10.23MHz, respectively, and their wavelengths are 19.03cm. and 24.42cm. A variety of signals are modulated on L1 and L2 respectively. These signals mainly include:
C/A code
The C/A code is also called the coarse acquisition code. It is modulated on the L1 carrier and is a 1MHz pseudo-random noise code (PRN code) with a code length of 1023 bits (period of 1ms). Since the C/A codes of each satellite are different, we often use their PRN numbers to distinguish them. The C/A code is a main signal used by ordinary users to determine the distance between the station and the satellite.
P code
The P code, also known as the fine code, is modulated on the L1 and L2 carriers and is a 10MHz pseudo-random noise code with a period of seven days. When implementing AS, the P code and the W code are added modulo-2 to generate a confidential Y code. At this time, the general user cannot use the P code for navigation and positioning.
Read recommendations:
G900LM-4G Car Mini GPS Tracker
Last article:Brief introduction of GPS control part
Next article:What are the components of GPS
Related Information
fleet gps trackers maker
2023-04-23Car gps tracking Processing
2023-04-23real-time gps tracking maker
2023-04-23car gps tracker Factory
2023-04-23CantrackGPS
2023-03-164G GPS Tracker price
2023-04-23pet gps tracker cat sales
2023-03-16real-time gps tracking Vendor
2023-04-23Cantrack G05
2023-03-16OBD GPS Tracker sales
2023-03-16G500L -4G OBD GPS Tracker
2022-09-06personal gps tracker Production
2022-09-06G900LM-4G Car GPS Tracker
2025-03-25G900LS 8 Lines-4G Car GPS Tracker
2025-03-31P02L Smart Walkie-Talkie Tracker
2025-09-19Tongda GPS positioning monitoring system technology for you
2022-08-24Mobile GPS.plug & play Obd gps tracker wholesale
2023-05-20GPS system GPS BLOKC III prototype starts testing
2023-02-03Navigator classification.Mouth and word buckle price
2023-06-06Requirements for logistics tracking and monitoring
2022-12-01GPS Snitch real-time target tracking
2022-10-12International GPS development
2022-12-29GPS lofting.OBD GPS Tracker Manufacturing
2023-07-03GSM function of GPS.gps tracker no monthly fee Production
2023-08-15Introduce the different types of the positioner
2023-03-07GPS Development.cat gps tracker manufacture
2023-07-20Do you know the working principle of the pet GPS positioner?realtime gps tracker online wholesaler
2023-03-10The manufacturer compares the difference between Beidou positioning and GPS positioning.plug & p
2023-05-12How to determine whether the car is equipped with a GPS positioner?trailer gps tracker Manufacturing
2023-03-17The development history of GPS
2022-08-12