GalaxEye Advances 30-Satellite OptoSAR Constellation After Securing US Patent

Indian space-tech startup GalaxEye is moving ahead with plans to build a constellation of 30 Earth-observation satellites over the next five years, expanding on the technology demonstrated by its first orbital platform, Mission Drishti.

The company’s strategy centres on OptoSAR, a system that combines optical and synthetic aperture radar imaging on the same spacecraft. GalaxEye says the architecture allows both sensors to capture the same location during a single pass, producing data that is spatially and temporally aligned from the outset.

The expansion plan follows a major intellectual-property milestone. In September 2026, GalaxEye announced that it had secured a United States patent covering the architecture used to align and synchronise optical and microwave sensors for simultaneous data acquisition. The patent provides international protection for the core technology underlying its OptoSAR platform.

Mission Drishti Established the First Orbital Demonstration

GalaxEye’s first satellite, Mission Drishti, was launched on May 3, 2026 aboard a SpaceX Falcon 9 from California.

The approximately 190-kg spacecraft combines an X-band synthetic aperture radar sensor with a seven-band multispectral imager. GalaxEye describes it as the world’s first commercial satellite to carry SAR and multispectral optical sensors on the same platform for co-acquired imagery.

Mission Drishti operates in a sun-synchronous low-Earth orbit at roughly 500 km altitude. According to the company, the satellite is designed for all-weather, day-and-night imaging with spatial resolutions ranging from about 1.2 metres to 3.6 metres depending on the product and imaging mode.

The mission serves as the technological foundation for the larger constellation now being planned.

Why Combining Optical and Radar Imaging Matters

Conventional Earth-observation systems usually rely on either optical cameras or synthetic aperture radar.

Optical imagery is relatively intuitive to interpret because it resembles conventional photography and can provide rich colour and spectral information. Its major limitation is atmospheric and lighting dependence. Clouds, smoke, haze and darkness can prevent useful acquisition.

Synthetic aperture radar operates differently. It transmits microwave energy towards the Earth and measures the returned signal, allowing observation through cloud cover and at night. Radar can reveal structural information, surface texture and other characteristics that are difficult to obtain optically, but radar imagery can be more complex to interpret.

GalaxEye’s approach is to combine both sensing modes on a single spacecraft so that the strengths of one compensate for the limitations of the other.

OptoSAR Addresses the Problem of Mismatched Satellite Data

One of the less obvious challenges in combining optical and radar imagery is that the two datasets are often collected by different satellites at different times.

This creates two problems: parallax and temporal mismatch. Different viewing angles can shift features relative to one another, while even a small time gap can matter when observing moving vehicles, floods, fires, ships or rapidly changing infrastructure.

GalaxEye says its SyncFusion technology physically co-locates the optical and SAR sensors on the same thermally stable platform. Both systems therefore observe the same area during the same orbital pass.

The company also uses onboard and ground-based AI algorithms for sub-pixel co-registration and jitter correction, allowing the resulting imagery to be processed as a unified dataset rather than as two unrelated images.

US Patent Covers the Core Sensor Architecture

The US patent announced by GalaxEye in September covers the core system used to align and synchronise optical and microwave sensors for simultaneous, spatially and temporally matched data acquisition.

This is important for the company because the sensor architecture forms the basis of both Mission Drishti and its planned next-generation satellites.

International patent protection can also strengthen GalaxEye’s position as it expands into overseas markets, particularly where Earth-observation companies compete on proprietary payload architecture, data-processing techniques and imaging products.

The patent does not by itself guarantee commercial success, but it gives GalaxEye a stronger intellectual-property position around the central technical idea behind OptoSAR.

Thirty Satellites Could Sharply Improve Revisit Rates

The move from one spacecraft to a 30-satellite constellation would substantially change the operational value of GalaxEye’s system.

A single low-Earth-orbit satellite can only revisit a given location at intervals determined by its orbit and imaging schedule. Mission Drishti currently has a quoted revisit frequency of around four days.

A larger constellation distributes satellites across multiple orbital positions, allowing the same location to be observed more frequently. For applications such as disaster response, maritime monitoring, defence surveillance, crop assessment or infrastructure tracking, higher revisit frequency can be as important as image resolution.

GalaxEye has indicated that future satellites will also improve specifications compared with the first-generation platform.

Defence and Security Are Important Applications

The company lists defence and security among the principal applications for OptoSAR data.

All-weather imaging is especially relevant to defence because operational timelines cannot depend on cloud cover, daylight or atmospheric visibility. Combining radar and optical data can support change detection, object identification, terrain analysis and persistent monitoring.

GalaxEye has previously conducted sensor trials with the Indian Army’s Northern Command and has also participated in defence innovation programmes.

Its technology is therefore being developed not only for commercial remote sensing but also for strategic and security use cases where timely, aligned imagery can support decision-making.

Maritime Monitoring Could Benefit From Combined Sensors

The Indian Ocean and other maritime regions present a particularly useful application for SAR-based imaging.

Radar can detect vessels and surface features even when clouds obscure optical imagery. Optical data can then provide visual and spectral context when atmospheric conditions permit.

A co-acquired OptoSAR dataset can potentially make it easier to correlate vessel signatures, coastal activity and other changes without relying on separately timed satellite passes.

For India, this capability has obvious relevance to maritime domain awareness across a large oceanic area.

Agriculture and Disaster Response Are Major Civilian Use Cases

The same technology also has important civilian applications.

In agriculture, multispectral data can provide information about vegetation health, while radar can support analysis of soil moisture, crop structure and field conditions even during cloudy weather.

For disaster management, the ability to image through clouds is particularly valuable during floods, cyclones and heavy monsoon conditions, when conventional optical satellites may be least reliable.

Fused imagery can also help assess damaged infrastructure, water-body expansion, landslides and rapid changes across affected areas.

Infrastructure and Urban Monitoring Add Commercial Demand

GalaxEye also sees applications in infrastructure, urban planning, energy, mining and environmental monitoring.

A satellite constellation capable of providing frequent, analysis-ready imagery could support construction monitoring, road and rail inspection, land-use change detection and large-scale asset management.

The company’s Chitra platform is intended to give users direct access to tasking and imagery products. Customers can define an area of interest, request new acquisitions and receive processed outputs rather than working only with raw satellite data.

This moves GalaxEye beyond spacecraft manufacturing into the wider Earth-intelligence market, where recurring data services can become as important as the satellites themselves.

Building a Constellation Is More Difficult Than Launching One Satellite

The 30-satellite target represents a major increase in technical, financial and operational complexity.

A constellation requires repeatable spacecraft manufacturing, reliable supply chains, launch arrangements, ground infrastructure, mission-control capacity and large-scale data processing.

The economics also depend on sustained demand. Building satellites is capital-intensive, so the success of the programme will depend on converting technical performance into long-term contracts across government and commercial markets.

Mission Drishti provides the first operational proof point, while the next phase will test whether GalaxEye can scale the architecture into a repeatable satellite platform.

GalaxEye Reflects India’s Shift Towards Private Earth Observation

GalaxEye was founded in 2021 by engineers from IIT Madras and has grown during a period of rapid change in India’s private space sector.

Policy reforms have opened areas previously dominated by government agencies to private participation, while startups are increasingly developing launch vehicles, satellites, propulsion systems, communications platforms and Earth-observation services.

Mission Drishti is significant within this transition because it combines domestically developed hardware, software and data-processing capability in an operational private satellite.

The planned constellation would move GalaxEye from a demonstration-stage company towards a persistent Earth-observation network.

OptoSAR Could Become a Distinct Indian Earth-Observation Capability

The central ambition behind GalaxEye’s expansion is not simply to increase the number of satellites in orbit.

The company is attempting to establish a distinct imaging architecture in which radar and optical data are collected together from the beginning rather than combined later from separate spacecraft.

If the 30-satellite plan is executed successfully, the result would be a constellation capable of delivering more frequent all-weather imagery for defence, agriculture, disaster management, maritime monitoring and infrastructure applications.

Mission Drishti has already demonstrated the core concept in orbit, while the US patent gives GalaxEye international protection for the architecture behind it. The next stage will determine whether that technology can be scaled into one of India’s first large private Earth-observation constellations.

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References

GalaxEye — Mission Drishti: World’s First OptoSAR Imaging Satellite. GalaxEye
https://www.galaxeye.space/mission-drishti-launch

GalaxEye — The Technology Behind OptoSAR and SyncFusion. GalaxEye
https://www.galaxeye.space/technology

GalaxEye — About GalaxEye and Mission Drishti Development Timeline. GalaxEye
https://www.galaxeye.space/about

Business Standard — With US-patented tech, GalaxEye plans to launch 30 satellites in 5 years, October 4, 2026. Business Standard
https://www.business-standard.com/companies/start-ups/with-us-patented-tech-galaxeye-plans-to-launch-30-satellites-in-5-years-126100200755_1.html

Business Standard — GalaxEye becomes first startup to win US patent for satellite imaging tech, September 8, 2026. Business Standard
https://www.business-standard.com/companies/start-ups/galaxeye-becomes-first-startup-to-win-us-patent-for-satellite-imaging-tech-126090701111_1.html

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