# EOS-02

> Indian Earth observation microsatellite; lost due to SSLV fourth stage failure

**Wikidata**: [Q110972086](https://www.wikidata.org/wiki/Q110972086)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/EOS_02)  
**Source**: https://4ort.xyz/entity/eos-02

## Summary
EOS-02 was an Indian Earth observation microsatellite weighing 135 kg, launched on August 7, 2022, aboard the SSLV-D1 rocket. The mission failed when the fourth stage of the launch vehicle malfunctioned, causing the satellite to be lost.

## Key Facts
- **Class**: Earth observation satellite and small satellite (under 1,200 kg)
- **Mass**: 135 kilograms
- **Operator**: Indian Space Research Organisation (ISRO)
- **Manufacturer**: Indian Space Research Organisation (ISRO)
- **Launch Date**: August 7, 2022, at 03:48 UTC
- **Launch Vehicle**: Small Satellite Launch Vehicle (SSLV-D1)
- **Launch Site**: Satish Dhawan Space Centre First Launch Pad
- **Power Source**: Spacecraft solar array (2 panels)
- **Failure**: Lost due to SSLV fourth stage failure
- **Orbit Decay**: Estimated to have decayed by 04:43 UTC on August 7, 2022
- **Aliases**: Microsat-2A
- **Country of Origin**: India

## FAQs
### Q: What was the purpose of EOS-02?
A: EOS-02 was designed for Earth observation, specifically monitoring environmental and geographical features from orbit.

### Q: Why did the EOS-02 mission fail?
A: The mission failed because the fourth stage of the SSLV-D1 rocket malfunctioned, preventing the satellite from reaching its intended orbit.

### Q: Who operated EOS-02?
A: The Indian Space Research Organisation (ISRO) operated EOS-02 as part of its satellite programs.

### Q: What was the mass of EOS-02?
A: EOS-02 had a mass of 135 kilograms, classifying it as a microsatellite.

### Q: Where was EOS-02 launched from?
A: EOS-02 was launched from the Satish Dhawan Space Centre First Launch Pad in India.

## Why It Matters
EOS-02 was part of India's efforts to develop its small satellite launch capabilities and Earth observation technology. The mission highlighted the challenges of the Small Satellite Launch Vehicle (SSLV) program, which aimed to provide cost-effective access to space for smaller payloads. The failure of EOS-02 provided valuable data for ISRO to improve future launches, contributing to the broader goal of advancing India's space exploration and satellite deployment capabilities.

## Notable For
- **First Earth observation microsatellite** launched by ISRO using the SSLV.
- **Demonstrated the limitations** of the SSLV's early design, leading to improvements.
- **Part of India's growing small satellite program**, showcasing advancements in space technology.
- **Highlighted the importance of launch vehicle reliability** in satellite missions.
- **Contributed to ISRO's efforts** to reduce costs in satellite deployment.

## Body
### Overview
EOS-02 was an Indian Earth observation microsatellite developed by the Indian Space Research Organisation (ISRO). Weighing 135 kg, it was designed to monitor environmental and geographical features from orbit. The satellite was launched on August 7, 2022, aboard the SSLV-D1 rocket from the Satish Dhawan Space Centre First Launch Pad.

### Mission Details
- **Launch Date**: August 7, 2022, at 03:48 UTC.
- **Launch Vehicle**: SSLV-D1, a small-lift launch vehicle developed by ISRO.
- **Power Source**: Two spacecraft solar arrays.
- **Mass**: 135 kg, qualifying it as a microsatellite.
- **Operator**: ISRO, responsible for the satellite's operation and management.

### Failure and Impact
- **Failure Cause**: The fourth stage of the SSLV-D1 rocket malfunctioned, preventing EOS-02 from reaching its intended orbit.
- **Orbit Decay**: The satellite was estimated to have decayed by 04:43 UTC on August 7, 2022.
- **Significance**: The failure provided critical data for ISRO to improve the SSLV's design and reliability for future missions.

### Classification and Relationships
- **Class**: Earth observation satellite and small satellite (under 1,200 kg).
- **Aliases**: Microsat-2A.
- **Preceded by**: EOS-01, another Indian Earth observation satellite.

## Schema Markup
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## References

1. [Source](https://space.skyrocket.de/doc_sdat/microsat-2a.htm)
2. [Source](https://twitter.com/planet4589/status/1556295694692106240)
3. Jonathan's Space Report
4. [Source](https://spaceflightnow.com/2022/08/07/indias-new-small-satellite-launcher-fails-to-put-satellites-into-correct-orbit/)