# SSTL-S1 3

> Earth observation satellite

**Wikidata**: [Q111471574](https://www.wikidata.org/wiki/Q111471574)  
**Source**: https://4ort.xyz/entity/sstl-s1-3

Here’s the structured knowledge entry for **SSTL-S1 3** based on the provided source material:

---

## Summary  
SSTL-S1 3 is an Earth observation satellite designed to monitor Earth from orbit. It is part of the UK-DMC 3 trio of British imaging satellites and was manufactured by Surrey Satellite Technology. Launched in 2015, it operates in a Sun-synchronous orbit for high-resolution optical imaging.

## Key Facts  
- **Launch Date**: July 10, 2015, at 16:28 UTC ([reference](https://www.wikidata.org/wiki/Q6272367))  
- **Mass**: 447 kg (launch weight) ([reference](https://space.skyrocket.de/doc_sdat/uk-dmc-3.htm))  
- **Operator**: DMC International Imaging ([reference](https://space.skyrocket.de/doc_sdat/uk-dmc-3.htm))  
- **Launch Vehicle**: Polar Satellite Launch Vehicle-XL (PSLV-C28) ([reference](https://www.wikidata.org/wiki/Q6272367))  
- **Orbit**: Sun-synchronous ([reference](https://space.skyrocket.de/doc_sdat/uk-dmc-3.htm))  
- **Manufacturer**: Surrey Satellite Technology ([reference](https://space.skyrocket.de/doc_sdat/uk-dmc-3.htm))  
- **Country of Origin**: United Kingdom ([reference](https://space.skyrocket.de/doc_sdat/uk-dmc-3.htm))  
- **COSPAR ID**: 2015-032C  
- **Aliases**: DMC 3-FM3, UK-DMC3C, TripleSat 3, Beijing 2-3  

## FAQs  
### Q: What is the purpose of SSTL-S1 3?  
A: SSTL-S1 3 is an Earth observation satellite designed for high-resolution optical imaging, supporting applications like environmental monitoring and disaster management.  

### Q: Who operates SSTL-S1 3?  
A: It is operated by DMC International Imaging, a company specializing in satellite-based Earth observation services.  

### Q: Where was SSTL-S1 3 launched from?  
A: It was launched from the Satish Dhawan Space Centre First Launch Pad in India aboard a PSLV-XL rocket.  

## Why It Matters  
SSTL-S1 3 plays a critical role in Earth observation by providing high-resolution imagery for environmental monitoring, agriculture, and disaster response. As part of the UK-DMC 3 constellation, it enhances global coverage and data availability for commercial and scientific applications. Its launch marked a collaboration between British manufacturer Surrey Satellite Technology and Chinese firm 21AT, showcasing international partnerships in space technology. The satellite’s Sun-synchronous orbit ensures consistent lighting conditions for imaging, making it valuable for long-term environmental studies.  

## Notable For  
- **Part of a Trio**: One of three satellites in the UK-DMC 3 constellation, improving imaging coverage.  
- **International Collaboration**: Funded by Chinese firm 21AT and built by UK-based Surrey Satellite Technology.  
- **Lightweight Design**: At 447 kg, it demonstrates efficient smallsat technology for Earth observation.  

## Body  
### Launch and Deployment  
- **Launch Date**: July 10, 2015, at 16:28 UTC.  
- **Launch Site**: Satish Dhawan Space Centre First Launch Pad, India.  
- **Launch Vehicle**: PSLV-XL (flight number PSLV-C28).  

### Technical Specifications  
- **Spacecraft Bus**: SSTL-300 platform.  
- **Mass**: 447 kg (launch weight).  
- **Orbit**: Sun-synchronous, optimized for consistent Earth imaging.  

### Operational Details  
- **Operator**: DMC International Imaging.  
- **Primary Use**: Optical Earth observation for commercial and scientific applications.  

### Collaborations  
- **Funder**: Chinese company 21AT.  
- **Manufacturer**: Surrey Satellite Technology (UK).  

--- 

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/uk-dmc-3.htm)
2. Jonathan's Space Report
3. [Source](https://spacenews.com/surrey-build-three-optical-imaging-satellites-chinese-firm/)