# Technology Experiment Satellite

> Indian remote sensing and photo-reconnaissance satellite

**Wikidata**: [Q7692568](https://www.wikidata.org/wiki/Q7692568)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Technology_Experiment_Satellite)  
**Source**: https://4ort.xyz/entity/technology-experiment-satellite

## Summary
The **Technology Experiment Satellite (TES)** is an Indian remote sensing and photo-reconnaissance satellite developed by the Indian Space Research Organisation (ISRO). Launched on October 22, 2001, it was India's first dedicated reconnaissance satellite, operating in a sun-synchronous orbit.

## Key Facts
- **Class**: Reconnaissance satellite and Earth observation satellite
- **Operator**: Indian Space Research Organisation (ISRO)
- **Launch Date**: October 22, 2001, at 04:53 UTC
- **Launch Vehicle**: Polar Satellite Launch Vehicle (PSLV-C3)
- **Launch Site**: Satish Dhawan Space Centre First Launch Pad
- **Orbit**: Sun-synchronous orbit
- **Mass**: 1,108 kg (launch weight)
- **Power Source**: Spacecraft solar array (2 units)
- **COSPAR ID**: 2001-049A
- **Country of Origin**: India

## FAQs
### Q: What was the purpose of the Technology Experiment Satellite (TES)?
A: TES was India's first dedicated reconnaissance satellite, designed to covertly collect data for intelligence or military applications while also performing Earth observation tasks.

### Q: Which organization launched TES?
A: The Indian Space Research Organisation (ISRO) launched TES on October 22, 2001, using the Polar Satellite Launch Vehicle (PSLV-C3).

### Q: What type of orbit did TES operate in?
A: TES operated in a sun-synchronous orbit, which is commonly used for Earth observation and reconnaissance missions.

### Q: How much did TES weigh at launch?
A: TES had a launch weight of 1,108 kilograms.

### Q: What was the significance of TES for India?
A: TES marked a significant milestone for India's space program, demonstrating its capability to develop and deploy advanced reconnaissance satellites independently.

## Why It Matters
The Technology Experiment Satellite (TES) was a pivotal development in India's space program, marking the country's entry into the realm of dedicated reconnaissance satellites. Launched in 2001, TES was India's first satellite designed for covert data collection, supporting intelligence and military applications. Its successful deployment showcased ISRO's growing expertise in satellite technology and reinforced India's position as a key player in the global space industry. By operating in a sun-synchronous orbit, TES provided valuable Earth observation data while fulfilling its reconnaissance objectives. This mission underscored India's commitment to advancing space capabilities, contributing to national security and scientific research.

## Notable For
- **First Indian Reconnaissance Satellite**: TES was India's first dedicated reconnaissance satellite, demonstrating ISRO's ability to develop advanced surveillance capabilities.
- **Sun-Synchronous Orbit**: Operated in a sun-synchronous orbit, optimizing its ability to observe Earth consistently.
- **PSLV Launch**: Successfully launched aboard the Polar Satellite Launch Vehicle (PSLV-C3), highlighting ISRO's reliability in satellite deployment.
- **Dual-Purpose Design**: Combined reconnaissance and Earth observation functions, showcasing versatility in satellite applications.
- **National Security Contribution**: Played a role in India's defense and intelligence operations, reinforcing the country's space-based surveillance infrastructure.

## Body
### Overview
The **Technology Experiment Satellite (TES)** was a significant milestone in India's space program, developed by the Indian Space Research Organisation (ISRO). Launched on October 22, 2001, TES was India's first dedicated reconnaissance satellite, designed to support intelligence and military applications while also performing Earth observation tasks.

### Launch and Deployment
- **Launch Vehicle**: TES was launched aboard the **Polar Satellite Launch Vehicle (PSLV-C3)**, a reliable expendable launch system developed by ISRO.
- **Launch Site**: The satellite was deployed from the **Satish Dhawan Space Centre First Launch Pad**, India's primary spaceport.
- **Orbit**: TES operated in a **sun-synchronous orbit**, ensuring consistent Earth observation and reconnaissance capabilities.

### Technical Specifications
- **Mass**: The satellite had a **launch weight of 1,108 kilograms**, including payload and propulsion systems.
- **Power Source**: TES was equipped with a **spacecraft solar array (2 units)**, providing the necessary electrical power for its operations.
- **COSPAR ID**: The satellite's COSPAR ID is **2001-049A**, indicating its official designation in the international satellite registry.

### Significance
- **Reconnaissance Capability**: TES was India's first satellite designed for covert data collection, supporting national security and defense objectives.
- **Earth Observation**: In addition to reconnaissance, TES performed Earth observation tasks, contributing to scientific and environmental research.
- **ISRO Milestone**: The successful deployment of TES demonstrated ISRO's growing expertise in satellite technology and reinforced India's position in the global space industry.

### Legacy
TES remains a notable achievement in India's space history, showcasing the country's ability to develop advanced satellite systems independently. Its dual-purpose design and successful operation in a sun-synchronous orbit have set a precedent for future reconnaissance and Earth observation missions by ISRO.

## References

1. [Source](https://www.isro.gov.in/launchers/list-of-pslv-launches)
2. [Source](https://space.skyrocket.de/doc_sdat/tes.htm)
3. Jonathan's Space Report