# Inmarsat-5 F4

> Inmarsat communications satellite

**Wikidata**: [Q18465508](https://www.wikidata.org/wiki/Q18465508)  
**Source**: https://4ort.xyz/entity/inmarsat-5-f4

Here’s the structured knowledge entry for **Inmarsat-5 F4**:

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## Summary  
Inmarsat-5 F4 is a communications satellite operated by Inmarsat, designed to provide global telecommunications services. Launched in 2017 aboard a Falcon 9 Full Thrust rocket, it is part of the Inmarsat-5 series and built by Boeing Satellite Development Center. The satellite operates in geostationary orbit, supporting high-speed broadband and mobile communications.

## Key Facts  
- **Launch Date:** May 15, 2017, at 23:21 UTC ([source](https://space.skyrocket.de/doc_sdat/inmarsat-5.htm)).  
- **Launch Vehicle:** Falcon 9 Full Thrust (serial number B1034) ([source](https://space.skyrocket.de/doc_sdat/inmarsat-5.htm)).  
- **Manufacturer:** Boeing Satellite Development Center ([source](https://space.skyrocket.de/doc_sdat/inmarsat-5.htm)).  
- **Mass:** 6,086 kg (launch weight) ([source](https://space.skyrocket.de/doc_sdat/inmarsat-5.htm)).  
- **Dimensions:** 7 m height (spacecraft bus), 40.6 m width (solar array) ([source](http://www.inmarsat.com/i5f4/)).  
- **Power System:** Equipped with 4 XIPS-25 ion thrusters and 2 solar arrays ([source](https://space.skyrocket.de/doc_sdat/inmarsat-5.htm)).  
- **Orbit:** Geostationary ([source](https://space.skyrocket.de/doc_sdat/inmarsat-5.htm)).  
- **Spacecraft Bus:** Boeing 702 ([source](https://space.skyrocket.de/doc_sdat/inmarsat-5.htm)).  
- **COSPAR ID:** 2017-025A ([source](https://space.skyrocket.de/doc_sdat/inmarsat-5.htm)).  

## FAQs  
### Q: What is the purpose of Inmarsat-5 F4?  
A: It provides global telecommunications services, including high-speed broadband and mobile communications, primarily for maritime, aviation, and government users.  

### Q: Who built Inmarsat-5 F4?  
A: It was manufactured by Boeing Satellite Development Center using the Boeing 702 spacecraft bus.  

### Q: When was Inmarsat-5 F4 launched?  
A: It launched on May 15, 2017, from Kennedy Space Center Launch Complex 39A aboard a Falcon 9 Full Thrust rocket.  

## Why It Matters  
Inmarsat-5 F4 plays a critical role in global telecommunications, enabling high-speed connectivity for remote and mobile users, including ships, aircraft, and emergency responders. As part of Inmarsat's Global Xpress (GX) network, it enhances broadband coverage, supporting industries that rely on reliable, real-time communication. Its deployment marked the completion of Inmarsat's initial GX constellation, ensuring near-global coverage. The satellite's advanced propulsion (XIPS-25) and large solar arrays reflect innovations in satellite efficiency and longevity, making it a key asset for global connectivity solutions.  

## Notable For  
- **Completion of GX Constellation:** The fourth and final satellite in Inmarsat's initial Global Xpress network.  
- **Advanced Propulsion:** Uses 4 XIPS-25 ion thrusters for station-keeping.  
- **Large Solar Array:** Spanning 40.6 meters, providing ample power for operations.  
- **High Launch Mass:** One of the heaviest commercial satellites launched by Falcon 9 at 6,086 kg.  

## Body  
### Launch and Deployment  
- Launched on **May 15, 2017**, from **Kennedy Space Center Launch Complex 39A**.  
- Used **Falcon 9 Full Thrust** (serial number B1034) as the launch vehicle.  

### Technical Specifications  
- **Mass:** 6,086 kg (launch weight).  
- **Dimensions:**  
  - Height: 7 m (spacecraft bus).  
  - Width: 40.6 m (solar array).  
- **Power System:**  
  - 4 XIPS-25 ion thrusters.  
  - 2 solar arrays.  

### Orbit and Operations  
- Operates in **geostationary orbit**.  
- Part of Inmarsat's **Global Xpress (GX)** network.  

### Manufacturer and Design  
- Built by **Boeing Satellite Development Center**.  
- Based on the **Boeing 702** spacecraft bus.  

### Identifiers  
- **COSPAR ID:** 2017-025A.  
- **NSSDCA ID:** 2017-025A.  

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

## References

1. [Source](https://space.skyrocket.de/doc_sdat/inmarsat-5.htm)
2. Jonathan's Space Report
3. [Source](http://www.inmarsat.com/i5f4/)