What Are the Different Types of GPS Computer Software?

GPS positioning system relies on the built-in SIM of the vehicle terminal to realize positioning by mobile GPRS signal transmission to the background. Locate people where they are far away. The predecessor of the GPS satellite positioning system is a meridian navigation satellite system developed by the US military. The GPS global positioning system is a new generation of space satellite navigation GPS positioning system jointly developed by the United States Army, Air Force, and Air Force in the 1970s.

GPS satellite positioning system

GPS positioning system is based on

The working principle of the GPS positioning system is that the main ground control station collects observation data and meteorological information from each monitoring station, calculates the ephemeris and satellite clock corrections of each satellite, edits the navigation message according to the prescribed format, and sends it to the station through the injection station on the ground. GPS satellites inject this information. When measuring positioning, users can use the receiver's stored ephemeris to get a rough overview of each satellite.

GPS is mainly composed of space satellite constellation, ground monitoring station and user equipment.

GPS space satellite constellation

The GPS space satellite constellation consists of 21 working satellites and 3 satellites in orbit. The 24 satellites are evenly distributed in 6 orbital planes, the inclination of the orbital plane is 55 °, the average height of the satellites is 20200 km, and the operating period is 11 h 58 min. Satellites use two radio carriers in the L-band to continuously send navigation and positioning signals to a large number of users. The navigation positioning signals contain satellite position information, making the satellite a dynamic known point. At any location on the earth at any time, at an altitude angle of 15 ° or more, an average of 6 satellites can be observed at the same time, up to a maximum of 9 satellites. GPS satellites generate two sets of electric codes, one called C / A code (Coarse / Acquisition Code 11023MHz) and one called P code (Precise Code 10123MHz).

Ground monitoring station

The ground control part is composed of a main control station, 5 global monitoring stations and 3 ground control stations. The monitoring stations are equipped with precision cesium clocks and receivers that can continuously measure all visible satellites. Satellite observations to be obtained by the monitoring station, including ionospheric and

With the improvement of living standards, wireless communication technology and global satellite positioning system (GPS) technology are increasingly used in all aspects of daily life. Whether it's a car or looking for children or the elderly with intellectual disability, safety monitoring and maintenance, wireless communications (GSM) and

(1) Terrestrial applications, including vehicle navigation, emergency response, atmospheric physical observation, geophysical resource exploration, engineering survey, deformation monitoring,

1. Monitoring, dispatching and command system for taxis, coaches and freight vehicles

2. Monitoring and dispatching command system for logistics vehicles

3. Dispatching and command system for vehicles of government departments such as traffic management

4. Monitoring, dispatching and command system for on-duty vehicles of insurance companies

5.Monitoring, dispatching and command system of police and traffic police duty vehicles

6. Bank dispatch vehicle monitoring and dispatching command system

7. Postal and 120 emergency vehicle dispatching monitoring system

8. Positioning control of four-person vehicles of institutions and enterprises, etc.

9. Positioning for children and the elderly

10. The v-ern-ment functional department handles emergency emergencies, and conducts remote monitoring and scheduling management of specific responsible action teams.

11. Military police exercise control dispatch command monitoring control.

12. Inspection and tracking, official vehicle management monitoring, etc.

13. High-tech security protection emergency rescue gift.

14. Personal detective tools, etc.

15. Alzheimer's patients and blind people should carry it with them to avoid getting lost.

16. Take it with you to avoid getting lost.

17. The police tracked the drug.

18. Problems with marriage and family (third party).

19. Blind people have difficulty tracking.

20. Anti-theft tracking of bicycles, electric vehicles and motorcycles

21. The eagle release track.

22. Tracking of athletes' training routes.