Mission Drishti

Context

Startup GalaxEye announced the loss of contact with Mission Drishti, the world's first OptoSAR satellite and India's largest privately built Earth observation satellite, after a severe geomagnetic solar storm during early orbital operations.

About the News

• Background:
   Developed by GalaxEye (incubated at IIT Madras), Mission Drishti is a 190-kg Earth observation satellite and the world's first commercial spacecraft integrating optical and radar sensors on a single platform.
• Launch Details:
   The satellite was launched on 3 May 2026 aboard a SpaceX Falcon 9 rocket from Vandenberg Space Force Base, California, USA.
• Primary Objective:
   To provide continuous, all-weather geospatial intelligence over India's borders and maritime regions, reducing dependence on foreign commercial satellite imagery.

Technical Architecture & Sensor Fusion

The OptoSAR Innovation

Traditional Earth observation satellites use separate optical and radar systems, each with limitations.

• Electro-Optical (EO) Sensors: Capture high-resolution images but cannot operate effectively during cloud cover, fog, or at night.
• Synthetic Aperture Radar (SAR): Uses microwave signals to image through clouds and darkness but produces complex radar imagery.
• OptoSAR Fusion: Combines EO and SAR sensors on one platform to generate high-quality, co-registered images under all weather and lighting conditions.

Data Distribution Ecosystem

Geospatial data will be distributed through NewSpace India Limited (NSIL), ISRO's commercial arm, for Indian strategic agencies and global commercial users.

Strategic Significance

• Sovereign Border Surveillance: Enables uninterrupted day-and-night monitoring of India's borders and maritime areas, strengthening national security.
• Commercial Market Disruptor: Integrating optical and radar sensors reduces satellite production, launch, and data-processing costs for agriculture, maritime, and disaster management.
• Maturation of Indian Spacetech: Demonstrates the capability of India's private space sector to develop advanced Earth observation satellites.

Technical Challenges & Mission Status

• The Space Weather Vulnerability: During the Launch and Early Orbit Phase (LEOP), a powerful geomagnetic solar storm likely damaged a critical onboard system, causing communication failure.
• Tumbling and Orbital Dynamics: Initial tracking showed orbital tumbling, reflecting challenges in stabilizing a multi-sensor satellite.
• Low Recovery Probability: Although recovery efforts continue from Mission Control Centre, Bengaluru, the chances of restoring communication remain low.

Way Forward

• Deepen In-House Manufacturing

Increase in-house system integration, component manufacturing, and satellite ruggedization to improve quality and reliability.

• Harden Next-Generation Electronics

Strengthen radiation shielding and introduce redundant subsystems using lessons from Mission Drishti's initial operations.

• Fleet Expansion Targets

Develop and launch two upgraded OptoSAR satellites within the next 24 months to restore and expand the constellation.

Conclusion

Despite its early loss, Mission Drishti successfully validated India's first hybrid OptoSAR technology and key onboard systems. The mission provides a strong engineering foundation for India's future defense and commercial remote-sensing capabilities while strengthening the country's private space ecosystem.