# Geosynchronous Satellite Launch Vehicle Mark I

> launch vehicle developed by the Indian Space Research Organisation

**Wikidata**: [Q65560833](https://www.wikidata.org/wiki/Q65560833)  
**Source**: https://4ort.xyz/entity/geosynchronous-satellite-launch-vehicle-mark-i

## Summary
The Geosynchronous Satellite Launch Vehicle Mark I (GSLV Mk I) is an expendable, medium-lift launch vehicle developed by the Indian Space Research Organisation (ISRO). As part of the GSLV family of rockets, it was designed as a three-stage-to-orbit vehicle. The GSLV Mk I was operated and owned by ISRO.

## Key Facts
- **Operator:** Indian Space Research Organisation (ISRO)
- **Country of Origin:** India
- **Vehicle Class:** Expendable launch vehicle, medium-lift launch vehicle
- **Vehicle Family:** Geosynchronous Satellite Launch Vehicle (GSLV)
- **Design:** Three-stage-to-orbit rocket model
- **Aliases:** GSLV Mk I, GSLV Mark I
- **Notable Payloads:** GSAT-1, GSAT-2, GSAT-3, INSAT-4C, INSAT-4CR, GSAT-5P

## FAQs
### Q: Who developed the GSLV Mk I?
A: The GSLV Mk I was developed, owned, and operated by the Indian Space Research Organisation (ISRO), the national space agency of India.

### Q: What kind of rocket was the GSLV Mk I?
A: The GSLV Mk I was classified as an expendable, medium-lift launch vehicle. It was designed as a three-stage-to-orbit rocket and is part of the GSLV family of launch vehicles.

### Q: What satellites did the GSLV Mk I launch?
A: The GSLV Mk I launched several Indian satellites, including the experimental communications satellite GSAT-1, the educational satellite GSAT-3, and the communications satellites INSAT-4CR and GSAT-5P. It was also the launch vehicle for INSAT-4C, a communications satellite that was destroyed.

## Why It Matters
The Geosynchronous Satellite Launch Vehicle Mark I represents a key component of India's sovereign space launch capabilities, developed and operated by its national space agency, ISRO. As a member of the GSLV family, its purpose was to provide India with the ability to launch its own satellites into orbit, particularly geosynchronous satellites, reducing reliance on foreign launch providers.

As a medium-lift, expendable vehicle, the GSLV Mk I filled a specific role within India's launch vehicle fleet. Its development and operation contributed to the country's experience in building and flying multi-stage rockets. The missions it undertook, launching communications and educational satellites, were integral to building out India's space-based infrastructure. The vehicle's history, including both successful and unsuccessful launches, provided critical data and experience that informed the continued evolution of the GSLV program.

## Notable For
- **National Development:** The GSLV Mk I was developed, owned, and operated entirely by the Indian Space Research Organisation (ISRO).
- **GSLV Family Variant:** It is the "Mark I" variant of the Geosynchronous Satellite Launch Vehicle family of Indian rockets.
- **Three-Stage Design:** The vehicle is specifically classified as a three-stage-to-orbit launch system.
- **Diverse Payloads:** It was used to launch a range of Indian satellites, including experimental (GSAT-1), educational (GSAT-3), and communications satellites (INSAT-4CR, GSAT-5P).

## Body
### Development and Operation
The Geosynchronous Satellite Launch Vehicle Mark I is a rocket model developed in India. The vehicle was both owned and operated by the Indian Space Research Organisation (ISRO). It is also known by the aliases GSLV Mk I and GSLV Mark I.

### Vehicle Classification
The GSLV Mk I is categorized by several technical classifications:
- **Part of:** Geosynchronous Satellite Launch Vehicle (GSLV) family
- **Subclass of:**
    - Expendable launch vehicle
    - Medium-lift launch vehicle
    - Three-stage-to-orbit

### Launch Payloads
The GSLV Mk I was used to launch several Indian satellites. Known payloads include:
- **GSAT-1:** An experimental communications satellite.
- **GSAT-2:** An Indian satellite.
- **GSAT-3:** An educational satellite.
- **GSAT-5P:** A communications satellite.
- **INSAT-4C:** A communications satellite that was destroyed.
- **INSAT-4CR:** A communications satellite.

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