# USA-84

> American navigation satellite used for GPS

**Wikidata**: [Q7865709](https://www.wikidata.org/wiki/Q7865709)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/USA-84)  
**Source**: https://4ort.xyz/entity/usa-84

## Summary  
USA-84 is an American navigation satellite launched in 1992 as part of the NAVSTAR Global Positioning System (GPS). It was operated by the United States Air Force and manufactured by Rockwell International. The satellite was launched aboard a Delta II rocket from Cape Canaveral Space Launch Complex 17.

## Key Facts  
- **Launch Date**: September 9, 1992 ([reference](https://www.wikidata.org/wiki/Q6272367))  
- **COSPAR ID**: 1992-058A ([reference](https://www.wikidata.org/wiki/Q328))  
- **Operator**: United States Air Force ([reference](https://www.wikidata.org/wiki/Q328))  
- **Manufacturer**: Rockwell International ([reference](https://www.wikidata.org/wiki/Q328))  
- **Launch Vehicle**: Delta II ([reference](https://www.wikidata.org/wiki/Q6272367))  
- **Launch Site**: Cape Canaveral Space Launch Complex 17 ([reference](https://www.wikidata.org/wiki/Q6272367))  
- **Satellite Catalog Number (SCN)**: 22108 ([reference](https://www.wikidata.org/wiki/Q328))  
- **Aliases**: Navstar 27 ([reference](https://www.wikidata.org/wiki/Q328))  

## FAQs  
### Q: What was the purpose of USA-84?  
A: USA-84 was a GPS satellite designed to provide global navigation and positioning services as part of the NAVSTAR GPS system operated by the U.S. Air Force.  

### Q: When was USA-84 launched?  
A: USA-84 was launched on September 9, 1992, from Cape Canaveral Space Launch Complex 17 aboard a Delta II rocket.  

### Q: Who manufactured USA-84?  
A: The satellite was manufactured by Rockwell International, a major American aerospace and defense contractor.  

## Why It Matters  
USA-84 played a critical role in expanding the NAVSTAR GPS constellation, which has become foundational for global navigation, military operations, and civilian applications. GPS satellites like USA-84 enable precise positioning, timing, and navigation services used worldwide in transportation, communication, and emergency response. Its launch contributed to the robustness and reliability of the GPS network, which underpins modern infrastructure, from smartphones to aviation.  

## Notable For  
- Part of the NAVSTAR GPS system, a cornerstone of global navigation technology.  
- Launched aboard the Delta II, a reliable and frequently used launch vehicle for GPS satellites.  
- Manufactured by Rockwell International, a key player in aerospace and defense during the late 20th century.  

## Body  
### Launch and Deployment  
- **Launch Date**: September 9, 1992 ([reference](https://www.wikidata.org/wiki/Q6272367))  
- **Launch Vehicle**: Delta II ([reference](https://www.wikidata.org/wiki/Q6272367))  
- **Launch Site**: Cape Canaveral Space Launch Complex 17 ([reference](https://www.wikidata.org/wiki/Q6272367))  

### Technical Specifications  
- **Operator**: United States Air Force ([reference](https://www.wikidata.org/wiki/Q328))  
- **Manufacturer**: Rockwell International ([reference](https://www.wikidata.org/wiki/Q328))  
- **Satellite Catalog Number (SCN)**: 22108 ([reference](https://www.wikidata.org/wiki/Q328))  

### Role in GPS Constellation  
- Part of the NAVSTAR GPS system, providing global positioning and timing services.  
- Contributed to the expansion and reliability of the GPS network in the early 1990s.

## References

1. Jonathan's Space Report