Location services have become an increasingly popular technology and are poised to become a standard feature on all mobile devices in the future.

Among the nine positioning and navigation technologies available, GPS currently stands out as the most accurate and widely used.

The GPS global satellite positioning system typically consists of three core components: the ground control part, the satellite space part, and the terminal device part. It can be said that the entire positioning process is accomplished through the joint coordination and cooperation of these three parts.

Currently, the GPS satellite system in space comprises 24 operational satellites, typically orbiting in the low Earth orbit of artificial satellites, evenly distributed across six orbits. To ensure adequate coverage, each orbit houses four satellites, positioned at an orbit angle of 55 degrees.

This arrangement of satellite orbits ensures that GPS positioning signals can be distributed to any corner of the world, allowing real-time observation of ground positions with four or more positioning satellites in the area.

This setup aligns with the multidimensional positioning analysis framework. Additionally, there are four backup satellites available.

The ground control part of the GPS positioning system consists of a monitoring station, a main control station, and ground antennas. The monitoring station's primary task is to oversee the normal operation of the entire ground system, verifying and reviewing the messages transmitted by the satellite to confirm their authenticity.

Furthermore, the monitoring station utilizes signal receivers to detect the distance differences between satellites, while also gathering additional data on Earth's meteorology and space environment. Monitoring stations are typically equipped with atomic clocks and ultra-high precision receivers, akin to the intelligence system and detection center of the main control station.

The main control station assumes a pivotal role, responsible for the comprehensive control of the ground monitoring system.

It collects and processes various observation data submitted by the monitoring station, formatting it in a fixed format for transmission to the ground launch center, which then relays it to the satellites. Moreover, the main control station is tasked with real-time modification of each satellite's ephemeris and clock value correction.

The ground antenna component is relatively straightforward, and primarily tasked with data transmission. It transmits various navigation data, positioning data, and messages from the main control station to the space satellites.

Simultaneously, it relays real-time information regarding the satellite's health status to the main control station for exchange and interaction.

The terminal receiver device plays a pivotal role in receiving GPS positioning signals in real-time, effectively facilitating users on land and at sea in real-time tracking, transformation, and measurement of target objects.

Currently, commonly used GPS receivers are mainly categorized as vehicle-type receivers, maritime-type receivers, aviation-type receivers, and satellite-type receivers for navigation. Additionally, there are geodetic-type receivers primarily used for geographic and engineering surveying purposes.

Furthermore, the evolution of location services extends beyond GPS, with emerging technologies such as Galileo, GLONASS, and BeiDou enhancing global navigation capabilities.

Galileo, Europe's global navigation satellite system, offers increased accuracy and reliability, particularly in challenging environments such as urban canyons and dense forests.