source:truck tracking webfleet solutions release time:2023-06-14 Hits: Popular:realtime gps tracker online
1. Space part
The space part of GPS is composed of 24 working satellites, which are located 20 200 km above the earth's surface, evenly distributed on six orbital planes (four for each orbital plane), and the Orbital inclination is 55 °. In addition, there are four active backup satellites in orbit. The distribution of satellites enables the observation of more than 4 satellites anywhere and at any time in the world, and maintains a geometric image with good positioning and calculation accuracy. This provides continuous global navigation capabilities over time. The GPS satellite generates two sets of codes, one of which is called the C/A code (Coarse/Acquisition Code 11023MHz); A group called Procise Code (10123MHz) is controlled by the US military due to its high frequency, low interference, and high positioning accuracy. It has a password and cannot be interpreted by ordinary people, mainly serving the US military. After deliberately reducing the accuracy of the C/A code through measures taken, it is mainly open for civilian use.
2. Ground control part
The ground control section consists of one main control station, five global monitoring stations, and three ground control stations. The monitoring stations are equipped with precision cesium clocks and receivers that can continuously measure all visible satellites. The satellite observation data obtained by the monitoring station, including ionospheric and meteorological data, will be preliminarily processed and transmitted to the main control station. The main control station collects tracking data from various monitoring stations, calculates the satellite's orbit and clock parameters, and then sends the results to three ground control stations. The ground control station injects these navigation data and main control station commands into each satellite as it reaches the sky. This injection is performed once a day on each GPS satellite and the final injection is performed before the satellite leaves the injection station's operational range. If a ground station malfunctions, the navigation information stored in the satellite can still be used for a period of time, but the navigation accuracy will gradually decrease.
3. User Equipment Section
The user equipment part is the GPS signal receiver. Its main function is to capture the selected test satellites according to a certain satellite cutoff angle and track their operation. After the receiver captures the tracked satellite signal, it can measure the pseudo distance and the rate of change of distance from the receiving antenna to the satellite, and demodulate data such as satellite orbit parameters. Based on these data, the microprocessor in the receiver can perform positioning calculations according to the positioning solution method, calculating the longitude and latitude, height, speed, time and other information of the user's geographical location. The receiver hardware, onboard software, and GPS data post-processing software package constitute a complete GPS user device. The structure of a GPS receiver is divided into two parts: an antenna unit and a receiving unit. The receiver generally uses two types of DC power sources, internal and external. The purpose of setting up the internal power supply is to continuously observe without interruption when replacing the external power supply. The battery automatically charges when using an external power source. After shutting down, the internal battery supplies power to the RAM memory to prevent data loss. Various types of receivers are becoming smaller in size and lighter in weight, making them easy to observe and use in the field.
Read recommendations:
Typical GPS Clock Products.Hidden GPS Trackers supplier
How can the function of the car GPS positioner meet the needs of users?fleet management software web
Last article:What is the difference between GPS positioning manufacturers and in car reverse imaging WiFi and 4G.
Next article:What are the information methods sent by GPS reference stations.gps tracker app Manufacturing
Related Information
Pet GPS Tracker manufacture
2023-03-16obd-II port gps tracker
2023-04-11gps tracker for kids Vendor
2023-04-23GPS Trackers sales
2023-04-11Car gps tracking Manufacturing
2023-04-23Vehicle tracking device
2023-03-16car gps tracker custom
2023-04-114G GPS Tracker distributors
2023-04-23Dog gps tracker
2023-04-11mini gps tracker Solution
2023-04-23YG119- Hunting Dog GPS tracker
2023-10-07G500L -4G OBD GPS Tracker
2022-09-06G900LM-4G Car Mini GPS Tracker
2025-03-254G Wired GPS Tracker PCBA
2022-06-17G183 serials -JOBD GPS Tracker
2022-09-06The manufacturer introduced in detail what applications of GPS in aviation flight navigation.gps tra
2023-04-25The advantages and disadvantages of the flat antenna of the GPS vehicle positioning terminal
2023-04-06GPS Earth Coordinate Series Brief description
2023-02-10Composition and characteristics of GPS system
2022-11-07Advantages and disadvantages of wireless gps trackers
2022-09-16What are the functions of a car navigator?gps tracker no monthly fee wholesale
2023-04-11Overview of GPS Vehicle System.portable gps tracker price
2023-08-11The advantage of remote anti -theft of electric vehicle GPS positioner.vehicle gps tracker webfleet
2023-03-28GPS positioning principle
2022-10-14GPS receiver work principle.gps tracker no monthly fee Manufacturing
2023-04-23How to help the GPS positioner help take care of the elderly and children?Car gps Solution
2023-02-18How to use a mobile phone to check the car GPS positioning system?
2023-09-20The difference between Beidou satellite and GPS.Pet GPS Tracker Manufacturing
2023-06-13Classification of GPS antenna
2022-11-12Introduction to GPS Navigation System
2022-11-07