---
title: "SSLV: ISRO's Small Satellite Launch Vehicle | Model Diplomat"
description: "The Small Satellite Launch Vehicle (SSLV) is ISRO's solid-fuel rocket for launching satellites up to 500 kg, enhancing India's space capabilities."
url: "https://modeldiplomat.com/learn/glossary/small-satellite-launch-vehicle-sslv"
---

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Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

- The Small Satellite Launch Vehicle is the Indian Space Research Organisation's three-stage solid-fuel rocket designed to place satellites up to 500 kg into low Earth orbit on demand.
- How does the SSLV differ from the PSLV?
- What is the Velocity Trimming Module on the SSLV?
- Why is the SSLV important for India's private space sector?
- What is the SSLV's payload capacity?

[Civil Service & Diplomatic Exams](https://modeldiplomat.com/learn/civil-services/glossary)Updated June 22, 2026

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## Timeline

1. 7 August 2022

   The maiden flight, SSLV-D1, lifted off from the Satish Dhawan Space Centre at Sriharikota on carrying the EOS-02 earth-observation satellite and the AzaadiS…

2. 10 February 2023

   The second developmental flight, SSLV-D2, succeeded on , placing EOS-07, the US firm Antaris's Janus-1, and SpaceKidz India's AzaadiSAT-2 into a circular LEO.

3. 16 August 2024

   The third developmental mission, SSLV-D3, flew successfully on with the EOS-08 microsatellite, completing the development phase and clearing the path for tr…

## Positions at a glance

### Supporters

A central design philosophy of the SSLV is responsiveness and economy. ISRO targeted a launch-readiness cycle measurable in days rather than months, integration by a small team, and minimal launch-pad infrastructure — features attractive to operators of time-sensitive or replacement satellites. The vehicle is engineered for "launch-on-demand" flexibility, with the capacity to accommodate multiple satellites and to support rideshare manifests. Crucially, the SSLV is intended for technology transfer: the production of operational vehicles is being moved from ISRO to Indian private industry under NSIL's coordination, making it the first Indian launcher conceived from the outset for substantial private-sector manufacture rather than purely in-house ISRO production.

### Opponents

Several controversies and developments frame the vehicle's trajectory. The SSLV-D1 anomaly drew scrutiny of ISRO's accelerated development methodology, though the rapid recovery to two consecutive successes vindicated the iterative approach. A more consequential debate concerns the technology-transfer model: in 2024–2025 IN-SPACe and NSIL ran a competitive process to select an Indian private consortium to absorb full SSLV manufacturing know-how, a landmark in commercialising a sovereign launch capability. Questions persist about whether domestic and global demand will sustain a high cadence, and whether Indian private players can scale production while meeting cost and reliability targets against entrenched competitors. The future SSLV variants and production rates depend heavily on securing anchor customers among constellation operators.

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Example

ISRO launched SSLV-D2 from the Satish Dhawan Space Centre, Sriharikota, on 10 February 2023, successfully placing EOS-07, the US firm Antaris's Janus-1, and SpaceKidz India's AzaadiSAT-2 into low Earth orbit.

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