# Syracuse 3B

> French military communications satellite

**Wikidata**: [Q18327669](https://www.wikidata.org/wiki/Q18327669)  
**Source**: https://4ort.xyz/entity/syracuse-3b

## Summary
Syracuse 3B is a French military communications satellite launched in 2006 to provide secure telecommunications for military operations. Operated by the Direction générale de l'Armement (DGA), it operates in geostationary orbit, ensuring continuous coverage for strategic and tactical communications. It is part of France's strategic infrastructure for defense and crisis management.

## Key Facts
- **Launch Date**: August 11, 2006, at 22:15 UTC.
- **Operator**: Direction générale de l'Armement (DGA), France's defense procurement agency.
- **Manufacturer**: Alcatel Alenia Space (now part of Thales Alenia Space).
- **Mass**: 3,725 kg at launch.
- **Orbit**: Geostationary orbit, providing fixed-position coverage.
- **Launch Vehicle**: Ariane 5 ECA (flight V172), launched from ELA-3 at Guiana Space Centre.
- **COSPAR ID**: 2006-033B.
- **Spacecraft Bus**: Spacebus-4000B3, equipped with solar arrays and an S400 battery.
- **Mission**: Secure military communications, including voice, data, and video transmission.

## FAQs
### Q: What is the primary purpose of Syracuse 3B?
A: Syracuse 3B provides secure, high-capacity communications for the French military, supporting operations in crisis zones and strategic deployments worldwide.

### Q: Who built and operates Syracuse 3B?
A: It was manufactured by Alcatel Alenia Space and is operated by the Direction générale de l'Armement (DGA), France's defense procurement agency.

### Q: How long has Syracuse 3B been operational?
A: Launched in 2006, it has far exceeded its planned 10-year lifespan, demonstrating robust design and adaptability to evolving military needs.

## Why It Matters
Syracuse 3B is a cornerstone of France's military communications network, ensuring resilient and encrypted connectivity for troops, command centers, and allied forces. Its geostationary position allows uninterrupted coverage of critical regions, enabling real-time coordination during operations. As part of the broader Syracuse satellite constellation, it reinforces France's strategic autonomy and interoperability within NATO. The satellite's longevity and reliability have made it a cost-effective asset, bridging older systems like Syracuse 2 and newer iterations like Syracuse 4 (COMSovereign). Its role in maintaining operational security and supporting overseas deployments underscores its importance in modern defense strategies.

## Notable For
- **Longevity**: Operated for over 17 years, surpassing its initial 10-year design life.
- **Secure Communications**: Uses advanced encryption and jamming resistance for sensitive military transmissions.
- **Geostationary Advantage**: Provides persistent coverage of Europe, Africa, and the Middle East from a fixed orbital position.
- **French Sovereignty**: Reduces reliance on foreign satellite systems, ensuring independent communication capabilities.
- **Technological Platform**: Utilizes the Spacebus-4000B3 bus, a proven European spacecraft design with modular payload capacity.

## Body
### Launch and Deployment
- **Launch Vehicle**: Ariane 5 ECA (flight V172), launched alongside Japan's JCSAT-3A satellite.
- **Launch Site**: ELA-3 launch pad at Guiana Space Centre, French Guiana.
- **Space Tug**: Equipped with an ESC-A H14.4 apogee kick motor for orbital insertion.

### Technical Specifications
- **Propulsion**: S400 bipropellant thrusters for station-keeping and maneuvering.
- **Power**: Two deployable solar arrays generating 7.3 kW at end-of-life, supplemented by rechargeable batteries.
- **Payload**: High-gain antennas and transponders supporting Ka-, X-, and EHF-band communications.

### Operational Role
- **Primary Users**: French Armed Forces, including Army, Navy, and Air Force units.
- **Capabilities**: Secure voice, data, and video relay; interoperability with allied networks; resistance to electronic warfare threats.
- **Coverage**: Focus on Europe, Africa, and theaters of operation in the Middle East and Indian Ocean.

### Legacy
- **Predecessors**: Follows Syracuse 1 (1984) and Syracuse 2 (1997) satellites.
- **Successors**: Complemented by Syracuse 4 (launched 2021), ensuring continuity of France's sovereign communication capabilities.
- **Cost Efficiency**: Extended operational life reduced the need for rapid replacement, optimizing defense spending.

## References

1. [Source](https://space.skyrocket.de/doc_sdat/syracuse-3.htm)
2. Jonathan's Space Report