1. Global coverage: The GPS system consists of 24 satellites in medium earth orbit, distributed in 6 orbital planes, with 4 satellites in each orbital plane. This layout enables signals from at least four satellites to be received anywhere on the earth, thus achieving global positioning.
2. High accuracy: The accuracy of GPS system is very high, the accuracy of single point positioning can reach less than 5 meters, and the accuracy of differential positioning can reach centimeter level. This makes GPS have irreplaceable advantages in aviation, navigation, surveying and mapping and many other applications that need accurate positioning.
3. Real-time: GPS system can provide continuous and real-time positioning service. Users can get their own location information at any time, which is of great significance for some applications that need real-time monitoring, such as vehicle tracking and emergency rescue. Autonomy: GPS system is an autonomous navigation system, and users can achieve positioning without communicating with ground base stations.
Multifunctional: In addition to providing location information, GPS system can also provide information such as speed and time. In addition, through the joint use with other navigation systems (such as GLONASS, BDS, etc.). ), you can achieve higher precision positioning and richer functions. Openness: GPS system is an open system, and anyone can use GPS receiver to receive satellite signals.
Application of Global Positioning System
1, navigation and positioning: The most basic application of GPS is to provide accurate location information for navigation and positioning. No matter in the city or in the wild, as long as there is a GPS receiver, you can know your exact position. Traffic management: GPS can be used for vehicle tracking and dispatching to improve transportation efficiency.
2. Emergency rescue: In case of emergency, such as car accident, fire, etc., GPS can quickly and accurately determine the accident location and provide important reference information for rescuers. Military application: GPS was originally developed for military purposes. It can provide accurate navigation and positioning services, which is very important for the precise attack of aircraft, missiles and other weapons.
3. Surveying and Mapping and Geographic Information System: GPS is an important tool of modern surveying and mapping, which can be used to make topographic maps, geological maps and other maps. At the same time, GPS data is also an important part of Geographic Information System (GIS). Agriculture: GPS can be used in precision agriculture to improve the yield and quality of crops through accurate positioning and measurement.
4. Sports: Participate in various sports activities, such as marathon, bicycle race, etc. GPS can be used to record the track and speed of athletes. Tourism: GPS can be used for tourism navigation, helping tourists find their destinations and know the location and information of scenic spots.