Abstract
Global positioning systems (GPSs) are satellite-based radio positioning systems that provide 24-h, three-dimensional position, velocity, and time information to military and civilian users anywhere on the Earth under any weather condition. The GPS has three major segments: space segment, control segment, and user segment. GPS satellites orbiting the Earth every 12h transmit continuous navigation signals. With the proper equipment, users can receive these signals to calculate time, location, and velocity. The GPS is rapidly becoming an integral component of the emerging global information infrastructure, with applications ranging from mapping and surveying to international air traffic management, location-based services (LBS), and global change research. Also, the GPS is increasingly used in the social sciences to support research for which real-time geographic location and time on human spatial activities are required.
| Original language | English |
|---|---|
| Title of host publication | International Encyclopedia of Human Geography, Second Edition |
| Publisher | Elsevier |
| Pages | 189-197 |
| Number of pages | 9 |
| ISBN (Electronic) | 9780081022955 |
| ISBN (Print) | 9780081022962 |
| DOIs | |
| State | Published - 1 Jan 2019 |
Keywords
- Differential GPS
- GLONASS
- GPS satellites
- Galileo system
- Geographic information systems
- Global navigation satellite system (GNSS)
- Global positioning systems
- Location-based services
- Time geography
- Wide area augmentation system (WAAS)