# Demeter

> French micro-satellite

**Wikidata**: [Q49559](https://www.wikidata.org/wiki/Q49559)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Demeter_(satellite))  
**Source**: https://4ort.xyz/entity/demeter

Here’s the structured knowledge entry for **Demeter**:

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## Summary  
Demeter is a French micro-satellite designed to detect electromagnetic emissions linked to seismic activity. Launched in 2004, it was part of Earth observation efforts to study potential precursors to earthquakes. The satellite operated until 2010, providing data for scientific research.

## Key Facts  
- **Launch Date**: June 29, 2004 ([reference](https://www.wikidata.org/wiki/Q6272367))  
- **Launch Vehicle**: Dnepr, a converted Soviet ICBM ([reference](https://www.wikidata.org/wiki/Q6272367))  
- **Launch Site**: Baikonur Cosmodrome Site 109 ([reference](https://www.wikidata.org/wiki/Q6272367))  
- **COSPAR ID**: 2004-025C ([reference](https://www.wikidata.org/wiki/Q8447))  
- **Class**: Earth observation satellite ([reference](https://www.wikidata.org/wiki/Q48183))  
- **Full Name**: Detection of ElectroMagnetic Emissions Transmitted from Earthquake Regions  
- **Mission Duration**: Operated until December 2010  

## FAQs  
### Q: What was Demeter's primary mission?  
A: Demeter aimed to detect electromagnetic signals potentially linked to earthquakes, helping scientists study seismic precursors.  

### Q: How was Demeter launched?  
A: It was launched aboard a Dnepr rocket, a repurposed Soviet ICBM, from Baikonur Cosmodrome.  

### Q: Is Demeter still operational?  
A: No, the satellite ceased operations in December 2010 after six years of data collection.  

## Why It Matters  
Demeter was significant as one of the first satellites dedicated to studying electromagnetic phenomena associated with earthquakes. Its data contributed to understanding whether such signals could serve as earthquake precursors, a topic of ongoing scientific debate. While definitive predictive capabilities remain unproven, Demeter advanced research in seismology and space-based Earth observation. Its mission also demonstrated France's role in micro-satellite technology and interdisciplinary science.  

## Notable For  
- **Specialized Focus**: One of the earliest satellites targeting earthquake-related electromagnetic emissions.  
- **Micro-Satellite Design**: Compact size compared to traditional Earth observation satellites.  
- **International Collaboration**: Launched from Kazakhstan using a repurposed Soviet rocket.  

## Body  
### Mission Overview  
- Demeter's primary objective was to detect and analyze electromagnetic disturbances potentially linked to seismic activity.  
- The satellite collected data until its decommissioning in December 2010.  

### Technical Specifications  
- **Launch Mass**: Micro-satellite class (exact mass not specified in sources).  
- **Orbit**: Low Earth orbit (specific altitude not provided).  

### Launch Details  
- **Vehicle**: Dnepr, a converted R-36M ICBM.  
- **Site**: Baikonur Cosmodrome's Site 109, a historic launch complex.  

### Legacy  
- Data from Demeter contributed to academic studies on earthquake prediction, though no conclusive predictive method was established.  
- Paved the way for future missions exploring geophysical phenomena from space.  

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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. Jonathan's Space Report
2. Freebase Data Dumps. 2013