Why in News
On May 3, 2026, Bengaluru-based space-tech startup GalaxEye successfully launched Mission Drishti aboard a SpaceX Falcon 9 rocket from Vandenberg Space Force Base, California at 12:29 PM IST — placing the satellite into a ~500 km Sun-Synchronous Orbit (SSO). Mission Drishti is the world’s first OptoSAR satellite — a platform that fuses Synthetic Aperture Radar (SAR) and Multispectral Imaging (MSI) in a single spacecraft. PM Narendra Modi and External Affairs Minister S Jaishankar publicly congratulated the team. ISRO described it as a “major boost” to India’s private space sector.
What is OptoSAR?
Traditional Earth observation satellites use either:
- Optical/Multispectral sensors — high-resolution colour imagery, but blocked by clouds and darkness
- Synthetic Aperture Radar (SAR) — all-weather, day-night imaging using microwave pulses, but lacks spectral detail
OptoSAR (Optical + SAR) fuses both sensors on a single platform, enabling:
| Capability | Optical Alone | SAR Alone | OptoSAR (Mission Drishti) |
|---|---|---|---|
| Cloud penetration | ✗ | ✓ | ✓ |
| Night imaging | ✗ | ✓ | ✓ |
| Colour/spectral detail | ✓ | ✗ | ✓ |
| Change detection | Limited | ✓ | ✓ |
| Resolution | High | Medium–High | 1.2–1.8 m |
The fusion allows a single pass to produce both radar and optical data simultaneously — reducing revisit time and data integration complexity.
Mission Drishti — Technical Specifications
| Parameter | Detail |
|---|---|
| Satellite name | Mission Drishti |
| Operator | GalaxEye Space Solutions Pvt Ltd, Bengaluru |
| Launch vehicle | SpaceX Falcon 9 (rideshare) |
| Launch date | May 3, 2026; 12:29 PM IST |
| Launch site | Vandenberg Space Force Base, California, USA |
| Orbit | Sun-Synchronous Orbit (SSO), ~500 km altitude |
| Mass | ~190 kg |
| Resolution | 1.2–1.8 metres |
| Sensor 1 | Synthetic Aperture Radar (SAR) — C-band or X-band |
| Sensor 2 | Multispectral Imaging (MSI) |
| Onboard processor | AI-enabled real-time image analysis in space |
| Indigenisation | Fully built in India |
| Future constellation | ~10 satellites by 2030 |
About GalaxEye
- Founded: 2021 by alumni of IIT Madras (Suyash Singh, Denil Chawda, Rakesh Belwal, Aakash Chavda)
- Headquarters: Bengaluru, Karnataka
- Funding: Backed by Peak XV Partners (formerly Sequoia India), Exfinity Ventures, and others
- Mission: Make Earth observation data affordable and accessible for government, agriculture, defence, and climate applications
- India’s largest privately built satellite at the time of launch (~190 kg)
Applications
Civil Applications
- Agriculture — Crop health monitoring, soil moisture mapping, yield prediction (works in monsoon cloud cover)
- Disaster management — Flood mapping, landslide monitoring, earthquake damage assessment in real time
- Urban planning — High-resolution change detection for infrastructure monitoring
- Forestry — Deforestation tracking, biomass estimation
- Climate monitoring — Ice sheet changes, coastline erosion, wetland mapping
Defence / Strategic Applications
- Border surveillance — Day-night monitoring of LAC, LOC, and maritime zones
- Naval surveillance — Ship detection and tracking in Indian Ocean Region
- Dual-use intelligence — Cross-referencing SAR and optical for camouflage detection
- Rapid damage assessment — Post-strike or disaster damage evaluation
India’s Private Space Sector Context
| Milestone | Year |
|---|---|
| IN-SPACe established (Indian National Space Promotion and Authorisation Centre) | 2020 |
| Space Activities Bill introduced | 2023 |
| Skyroot Aerospace — Vikram-S (first private rocket from India) | Nov 2022 |
| AgniKul Cosmos — Agnibaan SOrTeD (first semi-cryogenic private rocket) | May 2024 |
| Pixxel — Firefly constellation (hyperspectral) | 2023–2024 |
| GalaxEye — Mission Drishti (first OptoSAR) | May 2026 |
IN-SPACe (under the Department of Space) is the regulatory body enabling private participation in space activities under the Indian Space Policy 2023.
UPSC Relevance
| Paper | Angle |
|---|---|
| GS3 — Science & Technology | Space technology, remote sensing, private space sector in India |
| GS3 — Economy | Startups, indigenisation, technology export potential |
| GS3 — Security | Dual-use satellite technology, border surveillance |
| GS2 — Governance | IN-SPACe, Space Activities Bill, regulatory framework |
Mains Keywords: OptoSAR satellite, Synthetic Aperture Radar (SAR), Multispectral Imaging (MSI), GalaxEye, Mission Drishti, IN-SPACe, Indian Space Policy 2023, private space sector India, IIT Madras, Sun-Synchronous Orbit
Prelims Facts Corner
| Item | Fact |
|---|---|
| Mission Drishti | World’s first OptoSAR satellite |
| Developer | GalaxEye (IIT Madras alumni), Bengaluru |
| Launch date | May 3, 2026; SpaceX Falcon 9 |
| Orbit | ~500 km, Sun-Synchronous Orbit |
| Mass | ~190 kg (India’s largest private satellite at launch) |
| Resolution | 1.2–1.8 metres |
| Key feature | SAR + Multispectral Imaging fused; onboard AI; all-weather day-night |
| Future plan | ~10 satellite constellation by 2030 |
| IN-SPACe | Regulatory body for private space; est. 2020 under Dept of Space |
