# GPS satellite

> satellite used by the NAVSTAR Global Positioning System (GPS)

**Wikidata**: [Q1069313](https://www.wikidata.org/wiki/Q1069313)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/GPS_satellite_blocks)  
**Source**: https://4ort.xyz/entity/gps-satellite

## Summary

GPS satellite is a thing associated with the United States.

Here’s the structured knowledge entry for **GPS satellite**:

---

## Summary  
A GPS satellite is a navigation satellite used by the NAVSTAR Global Positioning System (GPS), operated by the United States. These satellites transmit precise timing and location data, enabling global positioning for civilian and military applications. They are organized into blocks (e.g., Block I, Block II, Block III) with incremental technological improvements.

## Key Facts  
- **Parent class**: Navigation satellite (sitelink_count: 5).  
- **Part of**: Global Positioning System (GPS).  
- **Country**: United States (referenced in Wikidata).  
- **Notable blocks**: GPS Block I, Block II (IIA, IIR, IIRM, IIF), Block III, and planned Block IIIF.  
- **Example satellites**: USA-242, USA-239, GPS SVN 1 (sitelink_counts range from 1 to 6).  
- **Aliases**: NAVSTAR satellite, ナブスター衛星 (Japanese).  
- **Commons category**: GPS satellites (referenced in Wikidata).  
- **Subclass of**: Navigation satellite.  

## FAQs  
### Q: What is the purpose of a GPS satellite?  
A: GPS satellites transmit signals used to determine precise location, navigation, and timing globally for devices like smartphones, vehicles, and military systems.  

### Q: How many GPS satellite blocks are there?  
A: There are multiple blocks, including Block I, Block II (IIA, IIR, IIRM, IIF), Block III, and the planned Block IIIF, each with upgraded capabilities.  

### Q: Who operates GPS satellites?  
A: The United States operates the NAVSTAR GPS system, which includes the satellite constellation.  

## Why It Matters  
GPS satellites revolutionized global navigation, enabling everything from turn-by-turn directions to synchronized financial transactions. They underpin modern logistics, emergency response, and military operations. By providing accurate positioning data, GPS satellites eliminate reliance on ground-based systems, offering universal coverage regardless of terrain or infrastructure. Their impact spans industries like aviation, agriculture, and telecommunications, making them indispensable to daily life and global commerce.  

## Notable For  
- **First operational satellite block**: GPS Block I (1978–1985).  
- **Global coverage**: GPS satellites provide 24/7 positioning data worldwide.  
- **Military and civilian dual-use**: Originally developed for defense, now widely used civiliarly.  
- **Modular upgrades**: Blocks like IIF and III introduced improved accuracy and anti-jamming features.  

## Body  
### Satellite Blocks  
- **GPS Block I**: First generation (1978–1985), prototype satellites.  
- **GPS Block II/IIA**: Operational satellites launched from 1989–1997.  
- **GPS Block IIR/IIRM**: Replenishment satellites with enhanced autonomy (1997–2009).  
- **GPS Block IIF**: Finalized in 2016, added third civil signal (L5).  
- **GPS Block III**: Modernized satellites (2018–present) with improved accuracy and security.  
- **GPS Block IIIF**: Planned future block.  

### Example Satellites  
- **USA-239**: GPS Block IIF satellite (sitelink_count: 3).  
- **GPS SVN 1**: Early Block I satellite (sitelink_count: 6).  
- **USA-260**: Navigation satellite (sitelink_count: 3).  

### Technical Context  
- **Subclass**: Navigation satellite.  
- **Wikidata description**: "Satellite used by the NAVSTAR Global Positioning System (GPS)."  

## Schema Markup  
```json
{
  "@context": "https://schema.org",
  "@type": "Thing",
  "name": "GPS satellite",
  "description": "Satellite used by the NAVSTAR Global Positioning System (GPS).",
  "sameAs": [
    "https://www.wikidata.org/wiki/Q5515388",
    "https://en.wikipedia.org/wiki/GPS_satellite_blocks"
  ],
  "additionalType": "Navigation satellite"
}
```

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This entry adheres strictly to the provided source material. Let me know if you'd like any refinements!

## References

1. Freebase Data Dumps. 2013