source:truck tracking webfleet solutions release time:2022-11-03 Hits: Popular:realtime gps tracker online
????
????1?? Space part
????The space part of GPS is composed of 24 satellites (21 working satellites and 3 standby satellites), which are located 20200km above the earth's surface and have an operation period of 12h. The satellites are evenly distributed on 6 orbital planes (4 for each orbital plane), with an orbital inclination of 55 掳. The distribution of satellites makes it possible to observe more than 4 satellites anywhere and at any time in the world, and to store navigation information in the satellites. The navigation accuracy of GPS satellites will gradually decrease with time due to atmospheric friction and other problems.
????2?? Ground control system
????The ground control system consists of a monitor station, a master monitor station, and a ground antenna. The master control station is located in Colorado Springfield, USA. The ground control station is responsible for collecting the information transmitted from the satellite, and calculating the satellite ephemeris, relative distance, atmospheric correction and other data.
????3?? User equipment
????The user equipment part is the GPS signal receiver. Its main function is to capture the satellites to be measured selected according to a certain cut-off angle of satellites, and track the operation of these satellites. After the receiver captures the tracked satellite signal, it can measure the pseudo distance from the receiving antenna to the satellite and the change rate of the distance, and demodulate the satellite orbit parameters and other data. Based on these data, the microprocessor in the receiver can calculate the location according to the location solution method, and calculate the longitude and latitude, height, speed, time and other information of the user's geographic location. The receiver hardware, onboard software and post-processing software package of GPS data constitute a complete GPS user equipment. The structure of GPS receiver is divided into antenna unit and receiving unit. Generally, the receiver adopts two kinds of DC power supply: internal and external. The purpose of setting the internal power supply is to replace the external power supply without interrupting continuous observation. The battery will automatically charge when using the external power supply. After shutdown, the internal battery supplies power to RAM memory to prevent data loss. All types of receivers are becoming smaller and lighter, which is convenient for field observation. The second is the user receiver. There are two kinds of single frequency and dual frequency receivers. However, due to the price factor, most users buy single frequency receivers.
Read recommendations:
What to do if the GPS positioning speed is slow.plug & play Obd gps tracker Solution
Application of GPS Positioning Technology in Network Security
Last article锛?The difference between gps and cellular version
Related Information
cat gps tracker
2023-04-114G GPS Tracker Manufacturing
2023-04-23fleet gps trackers Solution
2023-04-234G GPS Tracker for vehicles custom
2023-04-23Gps speed limiter wholesale
2023-04-23portable gps tracker wholesaler
2023-03-16real-time gps tracking manufacture
2023-04-23real-time gps tracking Production
2023-04-23OBD GPS Tracker distributors
2023-04-23fleet gps tracking maker
2023-04-23G06L- 4G Car GPS Tracker
2022-09-06G06L
2022-06-21G09L -6 inch Tail light tracker
2022-06-20G500L -4G OBD GPS Tracker
2022-09-06NB20 -4G Bluetooth Smart Pet Tracker
2022-06-21GPS Outlook
2022-07-25How to use GPS car tracker.realtime gps tracker online wholesale
2023-04-15GPS System Features
2022-07-23Several ways of GPS mobile phone positioning
2022-10-21The application process of GPS positioner in car loans is as follows.vehicle gps tracker Manufacturi
2023-03-17GPS smart bus stop sign
2022-09-05Handheld GPS instrument function.simple gps tracking company
2023-07-17Analysis of GPS Antenna Principle
2022-08-18Do I need to pay information for using GPS?
2022-10-10GPS signal acquisition unit
2022-11-10What's the reason for the shorter standby time of charging GPS locators.Gps speed limiter
2023-10-07Two Point Application of GPS.obd2 gps tracker verizon manufacturer
2023-08-01What are the principles of GPS trackers for birds?
2022-09-14GPS positioning principle.realtime gps tracker online distributors
2023-04-13GPS search for stars.obd-II port gps tracker Manufacturing
2023-08-10