# ADEOS I

> former Earth observation satellite

**Wikidata**: [Q14927](https://www.wikidata.org/wiki/Q14927)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/ADEOS_I)  
**Source**: https://4ort.xyz/entity/adeos-i

## Summary
ADEOS I (Advanced Earth Observing Satellite 1) was a former Earth observation satellite launched by Japan in 1996. It was part of the Advanced Earth Observing Satellite program and carried instruments like POLDER and the Total Ozone Mapping Spectrometer. The satellite operated until 1997 before experiencing a breakdown.

## Key Facts
- **Class**: Earth observation satellite
- **Launch date**: August 17, 1996, at 01:53 UTC
- **Launch vehicle**: H-II (H-II-4F variant)
- **Launch site**: Yoshinobu Launch Complex Launch Pad 1
- **Operator**: National Space Development Agency (Japan)
- **Mass**: 3,560 kg (launch weight)
- **Power source**: Spacecraft solar array (4,500 W)
- **Orbit**: Sun-synchronous orbit
- **Service entry**: November 26, 1996
- **Breakdown**: June 30, 1997
- **Followed by**: ADEOS II
- **Instruments**: POLDER, Total Ozone Mapping Spectrometer
- **Manufacturer**: Mitsubishi Electric
- **Country of origin**: Japan

## FAQs
### Q: What was the purpose of ADEOS I?
A: ADEOS I was designed to observe Earth from orbit, focusing on environmental monitoring, including atmospheric and oceanic studies. It carried instruments like POLDER for vegetation and cloud cover analysis and the Total Ozone Mapping Spectrometer for ozone measurements.

### Q: How long did ADEOS I operate?
A: ADEOS I was operational from November 26, 1996, until its breakdown on June 30, 1997, lasting about nine months.

### Q: What was the significance of ADEOS I?
A: ADEOS I was part of Japan’s Advanced Earth Observing Satellite program, which aimed to improve global environmental monitoring. It provided critical data on atmospheric and oceanic conditions, contributing to climate research and disaster management.

### Q: What happened to ADEOS I after its breakdown?
A: After its breakdown in 1997, ADEOS I was decommissioned, and its successor, ADEOS II, was launched to continue the mission.

### Q: Who operated ADEOS I?
A: ADEOS I was operated by the National Space Development Agency (now part of JAXA) in Japan.

## Why It Matters
ADEOS I played a crucial role in Japan’s early efforts in Earth observation, providing valuable data on environmental parameters such as ozone levels, vegetation, and oceanic conditions. Its instruments, including POLDER and the Total Ozone Mapping Spectrometer, contributed to global climate research and disaster monitoring. The satellite’s breakdown in 1997 led to the development of ADEOS II, ensuring continuity in Japan’s Earth observation program. ADEOS I’s mission highlighted the importance of satellite-based environmental monitoring in understanding and addressing global environmental challenges.

## Notable For
- **First in its class**: One of the first Japanese Earth observation satellites, paving the way for future missions.
- **Environmental monitoring**: Provided critical data on ozone levels, vegetation, and oceanic conditions.
- **Technological innovation**: Carried advanced instruments like POLDER for vegetation and cloud analysis.
- **Predecessor to ADEOS II**: Its breakdown led to the development of its successor, ensuring mission continuity.
- **Global impact**: Contributed to international climate research and disaster management efforts.

## Body
### Mission Overview
ADEOS I was launched on August 17, 1996, aboard an H-II rocket from the Yoshinobu Launch Complex. It entered service on November 26, 1996, and operated until June 30, 1997, when it experienced a breakdown. The satellite was part of Japan’s Advanced Earth Observing Satellite program, which aimed to enhance global environmental monitoring.

### Technical Specifications
- **Mass**: 3,560 kg at launch.
- **Power**: 4,500 W from a spacecraft solar array.
- **Orbit**: Sun-synchronous orbit.
- **Instruments**: Included POLDER (Polarization and Directionality of Earth’s Reflectances) for vegetation and cloud analysis, and the Total Ozone Mapping Spectrometer for ozone measurements.

### Significance
ADEOS I’s mission provided essential data on atmospheric and oceanic conditions, contributing to climate research and disaster management. Its instruments were designed to study Earth’s environment, including vegetation, clouds, and ozone levels, which are critical for understanding climate change and natural disasters.

### Legacy
ADEOS I’s breakdown in 1997 led to the development of ADEOS II, ensuring the continuity of Japan’s Earth observation program. The satellite’s mission set a foundation for future environmental monitoring efforts, demonstrating the importance of satellite-based observations in addressing global environmental challenges.

## References

1. [Source](https://space.skyrocket.de/doc_sdat/adeos-1.htm)
2. Jonathan's Space Report
3. [Source](https://global.jaxa.jp/projects/sat/adeos/index.html)
4. [Source](https://www.eoportal.org/satellite-missions/adeos)
5. Freebase Data Dumps. 2013
6. [Source](http://www.astronautix.com/a/adeos.html)