# Galileo

> series of satellites used by the Galileo Global Navigation Satellite System

**Wikidata**: [Q28469843](https://www.wikidata.org/wiki/Q28469843)  
**Source**: https://4ort.xyz/entity/galileo-q28469843

## Summary
Galileo is a series of satellites forming the core infrastructure of the Galileo Global Navigation Satellite System. This system provides a European-owned and operated alternative to other global navigation satellite systems.

## Key Facts
-   **Entity Type:** Spacecraft series (instance_of)
-   **Primary Function:** Part of the Galileo Global Navigation Satellite System (part_of)
-   **Classification:** Subclass of navigation satellites (subclass_of)
-   **Aliases:** Galileo satellite, Galileosatellit, Galileo-Navigationssatellit, Galileonavigationssatellit (aliases)
-   **Related Technology Tested:** GIOVE satellites (class) were used to test technology for the Galileo positioning system (Detailed Knowledge)
-   **Disambiguation:** Not to be confused with the NASA robotic space probe "Galileo" (Thing), which studied Jupiter and asteroids (Detailed Knowledge)
-   **Encyclopedia of China ID:** 68108 (Encyclopedia_of_China_(third_edition)_id)
-   **Associated List:** "list of Galileo satellites" (has_list)

## FAQs
### Q: What is the Galileo satellite series?
A: The Galileo satellite series refers to the constellation of spacecraft that constitute the physical backbone of the Galileo Global Navigation Satellite System, a European-run global satellite navigation system.

### Q: How does the Galileo satellite series relate to NASA's Galileo probe?
A: They are entirely separate entities. The Galileo satellite series belongs to the European Galileo GNSS, while the NASA "Galileo" was a robotic space probe specifically designed to study Jupiter and its moons, as well as asteroids.

### Q: What was the purpose of the GIOVE satellites mentioned alongside Galileo?
A: GIOVE satellites served as a technology testbed for the Galileo positioning system, validating critical technologies and signal structures before the operational Galileo satellites were deployed.

## Why It Matters
The Galileo satellite series is fundamentally important as it underpins the only independent, civilian-controlled, high-precision global navigation satellite system outside of the US GPS and Russian GLONASS. It provides enhanced accuracy, particularly in urban environments, improved availability and integrity for critical services like transportation, emergency response, and financial transactions. This infrastructure enhances Europe's strategic autonomy in satellite navigation, reduces reliance on foreign systems, and supports critical infrastructure resilience. By offering a robust, multi-constellation alternative, it strengthens global positioning, navigation, and timing (PNT) capabilities worldwide.

## Notable For
-   Being the satellite component of the first European-owned and operated global navigation satellite system.
-   Serving as the technological foundation for the European GNSS, distinct from US (GPS) and Russian (GLONASS) systems.
-   Utilizing test satellites (GIOVE) to validate core technology before the operational constellation deployment.
-   Providing a navigation satellite solution specifically designed to enhance precision and availability for civilian users.

## Body
### Purpose
The Galileo satellite series forms the space segment of the Galileo Global Navigation Satellite System (GNSS). Its primary purpose is to transmit radio signals enabling users with compatible receivers to determine their precise position, velocity, and time (PVT) anywhere on Earth.

### Classification & Relationships
-   **Instance Of:** Spacecraft series.
-   **Subclass Of:** Navigation satellite.
-   **Part Of:** Galileo (referring to the Global Navigation Satellite System).
-   **Related Test Class:** GIOVE (satellites tested Galileo positioning system technology).

### Disambiguation
It is crucial to distinguish this satellite series from the NASA robotic space probe named "Galileo". The NASA probe (launched 1989) focused on Jupiter system and asteroid exploration, while the Galileo satellite series serves the purpose of global navigation as part of the European GNSS.

### References & Lists
-   Associated entity: "list of Galileo satellites" provides details on individual spacecraft within the series.
-   Documented under Encyclopedia of China (Third Edition) ID: 68108.
-   Recognized by aliases including "Galileo satellite" and "Galileonavigationssatellit".