Global Positioning System - Wikipedia
The Global Positioning System (GPS), originally Navstar GPS, [2] is a satellite-based radio navigation system owned by the United States Space Force and operated by Mission Delta 31. [3] It is one of the global navigation satellite systems (GNSS) that provide geolocation and time information to a GPS receiver anywhere on or near the Earth where ...
全球导航卫星系统（为用户提供信息的空基无线电导航定位系统）_ …
全球导航卫星系统（英文：Global Navigation Satellite System，缩写：GNSS，又称全球卫星导航系统），是能在地球表面或近地空间的任何地点为用户提供全天候的3维坐标和速度以及时间信息的空基无线电导航定位系统。
GPS: What is it and how does it work? | Space
2022年12月6日 · GPS relies on very accurate atomic clocks carried on the satellites. Each satellite emits signals that enable receivers to determine their location and time, according to the FAA.
How Does GPS Work? | NASA Space Place – NASA Science for Kids
2024年10月11日 · GPS is a system of 30+ navigation satellites circling Earth. We know where they are because they constantly send out signals. A GPS receiver in your phone listens for these signals. Once the receiver calculates its distance from four or more GPS satellites, it can figure out where you are.
GPS | Definition, Types, Uses, & Facts | Britannica
GPS, space-based radio-navigation system that broadcasts highly accurate navigation pulses to users on or near Earth. In the United States’ Navstar GPS, 24 main satellites in 6 orbits circle Earth every 12 hours.
GPS - NASA
2023年9月25日 · The Global Positioning System (GPS) is a space-based radio-navigation system, owned by the U.S. Government and operated by the United States Air Force (USAF). It can pinpoint a three dimensional position to meter-level accuracy and time to the 10-nanosecond level, worldwide and 24/7.
GPS.gov: Space Segment - GPS: The Global Positioning System
2022年6月28日 · The GPS space segment consists of a constellation of satellites transmitting radio signals to users. The United States is committed to maintaining the availability of at least 24 operational GPS satellites, 95% of the time.
GPS.gov: GPS Overview - GPS: The Global Positioning System
2021年2月22日 · What is GPS? The Global Positioning System (GPS) is a U.S.-owned utility that provides users with positioning, navigation, and timing (PNT) services. This system consists of three segments: the space segment, the control segment, and the user segment. The U.S. Space Force develops, maintains, and operates the space and control segments.
How Does GPS Work? | Britannica
The Global Positioning System—better known as GPS—has 31 satellites orbiting Earth. These satellites carry atomic clocks that keep very accurate time. The GPS satellites transmit this time to receivers on Earth.
Global Navigation Satellite System (GNSS) - Earthdata
2024年2月29日 · The Global Positioning System (GPS) is the U.S. version of a Global Navigation Satellite System (GNSS). A GNSS system like GPS has three components: satellites in well-known orbits with synchronized clocks, ground controllers, and a ground segment providing data to users.