Part 3: The Eye Above the Battlefield — India's Space-Based Shield and the Race to See the Threat First
Dhinakar Rajaram · © 2026
Series: Geopolitics, Defence and the Changing Character of Warfare
Reading time: Approximately 18–22 minutes
Foreword
Warfare has always been, in part, a contest of time. The side which sees first, understands first and acts first possesses an advantage which may prove decisive before the opposing side has properly understood what is taking place.
For centuries, geography provided India with a considerable measure of strategic depth. The great distances between the international frontier and the principal cities and industrial centres of the country were not merely geographical facts; they constituted a form of protection. An adversary might possess the intention to strike deep inside the country, but the practical difficulties of doing so were considerable.
That strategic equation is changing.
The proliferation of unmanned aerial systems, cruise missiles, ballistic missiles, long-range precision weapons, electronic warfare and increasingly sophisticated surveillance technologies has altered the meaning of distance. The battlefield is no longer necessarily confined to the physical line at which armies meet. It may extend hundreds or thousands of kilometres beyond it, and increasingly it may extend upwards into space.
My first essay in this series, Beyond the Border: A Sober Reflection on Major Madhan Kumar's Warning and the New Geography of Warfare, examined the diminishing protective value of geographical distance and the growing reach of unmanned and precision warfare.
The second, On the Prospect of a Second Reckoning: India's Strategic Preparedness in an Age of Learning Adversaries, considered a more uncomfortable proposition: an adversary does not remain frozen in the circumstances of yesterday. He studies, adapts, modifies his methods and seeks better answers.
This third essay follows naturally from those two.
If warfare is becoming faster, longer-ranged and more dependent upon information, then the ability to see the threat before it reaches the battlefield becomes as important as the weapon employed to defeat it.
India's Space-Based Surveillance Phase III, or SBS-III, is consequently much more than a programme to put another collection of satellites into orbit. It represents an important movement towards persistent intelligence, surveillance and reconnaissance from space, greater land and maritime domain awareness, and a more closely connected national-security architecture.
The strategic significance lies not merely above our heads, but in what information from those satellites may ultimately enable decision-makers on the ground to know, and how early they may know it.
This essay is based entirely upon information available in the public domain, including official statements, publicly released material, established reporting and publicly accessible technical and strategic information. No classified, confidential, restricted or otherwise non-public information has been used in preparing this essay. Where operational details remain undisclosed, I have deliberately avoided presenting speculation as established fact and have identified reported information as such.
The purpose is not to disclose military information, but to examine openly available developments and consider their broader geopolitical, technological and strategic significance.
In doing so, I have sought to distinguish between what is officially stated, what has been reported by credible sources and what constitutes my own analytical interpretation. This distinction is particularly important in matters of national security, where operational details may necessarily remain outside the public domain.
The Three-Part Argument
This essay forms the third part of a continuing examination of the changing character of warfare.
- Part 1 — Beyond the Border: Beyond the Border: A Sober Reflection on Major Madhan Kumar's Warning and the New Geography of Warfare
- Part 2 — The Prospect of a Second Reckoning: On the Prospect of a Second Reckoning: India's Strategic Preparedness in an Age of Learning Adversaries
- Part 3 — The Eye Above the Battlefield: this essay examines India's developing space-based surveillance architecture and its significance for early warning, strategic awareness and national defence.
The progression is deliberate:
Threat → adaptation → awareness.
The first concerns the changing reach of weapons. The second concerns the ability of an adversary to learn. The third concerns India's ability to see, understand and respond before a developing threat becomes an immediate danger.
Preface
In October 2024, the Cabinet Committee on Security approved Phase III of India's Space-Based Surveillance programme. The project, reported at a cost of ₹26,968 crore, provides for the development and launch of 52 surveillance satellites. Twenty-one are to be constructed by ISRO, while the remaining 31 are to be produced by private Indian companies.
The programme therefore predates Operation Sindoor. That distinction is important.
Operation Sindoor did not create SBS-III. The programme had already received approval. What the events of May 2025 demonstrated was the operational value of persistent surveillance, rapid information flow, integrated air defence and the ability to observe developments beyond India's immediate line of sight. Subsequent reporting indicated that the deployment schedule was being accelerated, with the complete constellation targeted for deployment by 2029.
This is how serious strategic programmes normally evolve. A capability may be conceived before a particular crisis, yet the crisis may demonstrate its urgency with far greater clarity.
SBS-III should therefore be understood not as a hurried reaction to one particular conflict, but as part of a longer movement in Indian strategic thought: from occasional observation towards persistent awareness, from individual satellites towards constellations, and from isolated sensors towards integrated intelligence.
1. The Battlefield Has Acquired Another Dimension
The traditional battlefield was horizontal. Armies faced armies. Artillery engaged artillery. Aircraft crossed frontiers. Naval forces contested seas and maritime approaches.
The modern battlefield is multidimensional.
Land, sea, air, cyberspace and space increasingly form parts of the same strategic environment. An aircraft may depend upon satellite navigation. A missile may receive information from a network of sensors. A military headquarters may obtain imagery from a satellite hundreds of kilometres above the Earth. A drone may transmit information through a communications architecture extending far beyond the immediate battlefield.
In such circumstances, space is no longer an abstract frontier reserved for scientific exploration.
It is becoming an operational domain.
That does not mean that every satellite is a weapon, nor that every military satellite is intended for offensive action. Surveillance satellites, communication satellites, navigation systems and meteorological spacecraft may all support military operations without themselves being weapons.
The crucial point is that modern military power increasingly depends upon what happens in space.
For India, a country with extensive land borders, a large maritime area and important sea lines of communication, persistent awareness cannot reasonably depend upon one class of sensor or one location.
The eye must be distributed.
2. From a Satellite to a Constellation
There is a fundamental difference between possessing a satellite and possessing a constellation.
A single satellite may produce excellent imagery, but it cannot remain continuously above one particular location. Its orbit carries it onward. The same geographical area must therefore wait for another observation opportunity.
This is where the concept of revisit time becomes important.
Revisit time is the interval between successive opportunities to observe the same location. For a military commander attempting to understand a rapidly changing situation, the difference between seeing something once a day and seeing it several times within a substantially shorter period can be strategically significant.
A constellation changes the arithmetic.
Instead of depending upon one orbital platform, a country distributes the surveillance function among several satellites. The loss, temporary unavailability or maintenance of one platform need not necessarily result in the disappearance of the entire surveillance capability.
This principle is sometimes described as proliferated space architecture.
It is the difference between placing all one's eggs in one basket and distributing them among several baskets.
The latter arrangement does not make the system invulnerable. Satellites remain exposed to the harsh physical environment of space and to deliberate attempts at disruption, including electronic interference and potentially anti-satellite capabilities. What proliferation provides is greater redundancy and resilience.
3. Why Low Earth Orbit Matters
Low Earth orbit, or LEO, is particularly useful for many forms of Earth observation because satellites operating at relatively low altitudes can obtain high-quality observations with suitable sensors.
There is, however, no single orbit which solves every surveillance problem.
A low-orbit satellite moves rapidly relative to the Earth's surface. A geostationary satellite, by contrast, appears to remain above approximately the same region because it orbits at the Earth's rotational rate over the equator. Each has advantages and limitations.
The significance of SBS-III therefore lies partly in the use of satellites in different orbital regimes rather than in an obsession with one particular orbit.
The architecture becomes more useful when the various orbital assets are considered as parts of a wider surveillance system.
4. The Marriage of Sensors
One of the great misconceptions about satellite surveillance is that the satellite simply takes a photograph.
Modern reconnaissance is considerably more sophisticated.
Electro-optical systems can produce extremely detailed imagery under suitable illumination and atmospheric conditions. Infrared sensors can detect thermal characteristics. Synthetic Aperture Radar, or SAR, uses radar techniques to produce imagery and has the important advantage of operating independently of daylight and, subject to frequency and atmospheric conditions, through cloud cover.
These technologies answer different questions.
An optical sensor may tell an analyst what an object looks like.
Radar may reveal that an object is present despite darkness or cloud.
Infrared information may reveal a thermal characteristic which is not obvious in ordinary imagery.
Signals intelligence may provide information from electromagnetic emissions.
Geospatial intelligence may combine imagery, geographical information and other sources into a broader understanding of an area.
The future of surveillance is therefore not merely better cameras.
It is sensor fusion.
The value of a constellation rises substantially when information from several sensors can be correlated, compared and interpreted rather than examined as isolated pieces of evidence.
5. The Real Commodity Is Time
There is a deeper strategic principle behind the entire enterprise.
The real commodity in missile warfare is not merely distance.
It is time.
Consider a missile launched from a distant location. If the defender detects it only after it has travelled a substantial part of its trajectory, precious seconds have already disappeared.
Those seconds matter.
Detection must be followed by tracking. Tracking must be followed by classification. The system must determine what kind of object is being observed, where it is going and whether it represents a genuine threat. Information must then reach the appropriate command authority or weapon system.
Only after these stages can an interceptor or other defensive measure be employed.
This is why modern defence planners speak of the sensor-to-shooter loop.
The objective is to shorten the interval between detecting a threat and enabling an appropriate response.
It is also why the military concept of the OODA loop remains relevant: Observe, Orient, Decide, Act.
The side which completes that cycle more rapidly can acquire a disproportionate advantage.
SBS-III is therefore significant not because a satellite itself intercepts a missile, but because space-based surveillance may provide earlier and more persistent information to the wider defensive system.
6. The Sirsa Interception: A Lesson in Seconds
There is now a particularly instructive episode from Operation Sindoor which gives this argument a concrete operational dimension.
During the night of 9–10 May 2025, at the height of the military confrontation between India and Pakistan, an Indian Air Force air-defence unit based at Sirsa in Haryana intercepted a Pakistani ballistic missile in the skies over the region. Subsequent reporting has identified the defensive system as the Barak-8 surface-to-air missile system. The incident was reported in 2026 after further details of the operation became public.
Later reports have described the incoming weapon as a Pakistani ballistic missile and have variously associated it with the Fatah/Fateh family or another Pakistani missile system. The precise designation should therefore be treated with appropriate caution rather than presented as an officially settled fact.
Some subsequent accounts have reported that the missile may have been directed towards the Delhi region. Again, this should properly be described as a reported assessment rather than as an indisputable fact unless supported by an official operational statement.
What is beyond dispute in the broader strategic sense is the importance of the interception itself.
A high-speed ballistic threat was detected, tracked and engaged before reaching its intended terminal area.
That is an extraordinary demonstration of how compressed the decision window can become in modern warfare.
The defender has little room for error.
A radar must detect the object.
The system must establish its track.
The trajectory must be assessed.
The threat must be classified.
The appropriate command system must receive the information.
An interceptor must be assigned.
The interceptor must then reach the engagement geometry before the incoming missile reaches its terminal phase.
Every stage consumes time.
The Sirsa episode therefore provides a practical illustration of the principle developed earlier in this essay: in missile defence, information received early is itself a defensive asset.
And this leads directly to the larger question.
What if such detection could begin still earlier — not merely after a missile had travelled a substantial portion of its trajectory, but close to its point of launch?
7. From Detecting the Missile to Detecting the Launch
This is where space-based surveillance becomes particularly significant.
A terrestrial radar is constrained by geography, curvature of the Earth, atmospheric conditions and its physical location. It is an indispensable component of air defence, but it does not see everything everywhere at all times.
A satellite observing a large geographical area from above operates according to an entirely different geometry. Depending upon its orbit, sensor and mission, a space-based system may detect activity beyond the immediate horizon of a ground-based radar network.
The objective is not to replace terrestrial radar. It is to complement it.
The strongest architecture is therefore layered:
Space sensors → terrestrial sensors → airborne sensors → command network → interceptor systems.
The earlier a threat enters that chain, the greater the opportunity for the defender to understand it.
This is the real promise of a space-based early-warning architecture.
There is, however, another important dimension to early detection. The information obtained from space-based surveillance need not be relevant only to the interception of the incoming weapon. If a hostile missile, projectile or unmanned aerial system has been launched, surveillance and intelligence information may also assist in identifying the military infrastructure associated with that launch.
Such infrastructure may include launchers, missile or ammunition storage facilities, command-and-control installations, associated radar systems, communications facilities and other supporting elements required to prepare and conduct an attack.
Consequently, the strategic value of detecting the launch lies partly in the possibility of moving from warning of the attack to a much fuller understanding of the system conducting the attack.
On the defensive side, the information can contribute to the detection, tracking and engagement of the incoming missile, projectile or drone before it reaches its intended target.
On the offensive side, and subject to the appropriate political authority, rules of engagement and operational assessment, the same broader intelligence picture may contribute to military action against the systems and infrastructure enabling further attacks.
This distinction is important. A satellite does not independently decide to launch an interceptor or initiate an offensive strike. It is a sensor within a larger command-and-control architecture. Information must be collected, correlated, assessed and transmitted to the appropriate authorities before military action is undertaken.
The architecture can therefore be understood as having two complementary functions:
Detect and defeat the incoming threat.
Identify and, where authorised, neutralise the capability supporting the threat.
This is particularly significant in an age of mobile missile launchers, drones, long-range projectiles and distributed military infrastructure. Destroying one incoming weapon may prevent one attack; degrading the systems which enable repeated launches may have a wider operational effect.
The concept consequently extends beyond the traditional notion of missile warning. Space-based surveillance can become part of a broader sensor-to-shooter and sensor-to-target architecture, in which information gathered from space contributes both to immediate defensive action and to the wider conduct of military operations.
Early warning, in other words, is not merely about seeing the missile sooner.
It is about understanding the entire chain of activity behind the missile.
And in modern warfare, understanding that chain may be as important as intercepting the projectile itself.
8. The 52-Satellite Architecture
India's SBS-III programme is designed around a constellation rather than a single spacecraft.
The reported cost is ₹26,968 crore, with 52 satellites planned. Of these, 21 are to be developed through ISRO and 31 through India's private space sector. Reporting following Operation Sindoor indicated that the programme was being accelerated, with the full constellation targeted for deployment by the end of 2029.
The reported architecture includes satellites operating in different orbital regimes, with the broader objective of strengthening surveillance over India's terrestrial and maritime domains.
It is important not to imagine the constellation as 52 identical cameras looking continuously at the Earth.
They are better understood as components of a distributed surveillance architecture.
The value lies in their combined coverage, revisit capability, sensor diversity, redundancy and ability to contribute information to a wider intelligence and defence network.
9. Persistent Surveillance
The phrase persistent surveillance is particularly important.
Traditional intelligence may provide a snapshot.
Persistent surveillance seeks a continuing picture.
That distinction has profound strategic implications.
A single image may show a military vehicle.
A sequence of images may reveal that the vehicle has moved.
A longer sequence may reveal a pattern.
Patterns are often more valuable than isolated observations.
They can reveal changes in activity, unusual concentrations of equipment, construction, movement, logistics and other indications which may merit further investigation.
In intelligence work, context is everything.
A constellation capable of repeatedly observing an area therefore provides something more valuable than imagery alone: continuity of knowledge.
10. India Cannot Afford to See Only the Battlefield
A military commander does not merely need to know what is happening at the front. He may need to understand what is happening behind it.
Where are aircraft being dispersed?
Are missile units being moved?
Are new military facilities being constructed?
Are naval vessels changing their deployment pattern?
Are logistics routes becoming more active?
Has a previously quiet location suddenly become unusually busy?
These are questions of indications and warning.
The significance of persistent intelligence is that it can help establish a baseline. Once the normal pattern of activity is understood, deviations from that pattern become more conspicuous.
A single photograph is a snapshot.
A time series is a story.
Strategic surveillance seeks the story.
11. China, Pakistan and the Indian Ocean
India's geographical position makes the strategic value of such surveillance self-evident.
To the west lies Pakistan. To the north and north-east lies China. To the south stretches the Indian Ocean, through which a substantial proportion of India's trade and energy supplies move.
India therefore faces no single geographical theatre.
The northern frontier has its own military characteristics. The western frontier presents another set of problems. The maritime domain introduces an entirely different combination of naval, commercial and strategic considerations.
Space-based surveillance offers the possibility of examining these environments through a common strategic lens.
This does not mean that 52 satellites will provide uninterrupted visual coverage of every square kilometre of the region at every moment. Such a claim would be technically misleading.
The purpose of a constellation is instead to improve persistence, revisit rates, coverage, resolution and the resilience of the overall surveillance architecture.
Contemporary reporting identifies China, Pakistan and the Indian Ocean Region among the principal areas in which enhanced surveillance is strategically relevant.
12. The Strategic Importance of Sovereign Surveillance
There is also a geopolitical dimension which goes beyond technology.
Information is power.
A state which depends excessively upon another country for critical intelligence may find its strategic freedom constrained by the availability, timeliness or political conditions attached to that information.
Indigenous surveillance capability therefore has value beyond the image itself.
It strengthens strategic autonomy.
This does not mean that India should cease intelligence cooperation with friendly countries. Modern intelligence networks are collaborative by nature. Partnerships can provide capabilities which would otherwise be expensive or difficult to establish.
But sovereign capability provides insurance.
When national security is at stake, the ability to collect, process and interpret one's own information is an important element of strategic independence.
13. The Industrial Dimension
SBS-III also marks an important development in India's space-industrial ecosystem.
Of the 52 satellites, 21 are to be constructed through ISRO and 31 by private Indian companies. This distribution represents a significant expansion of private-sector participation in a strategically sensitive national capability.
A modern military constellation cannot depend indefinitely upon a single manufacturing pipeline. A larger industrial base provides additional capacity for production, testing, integration and, eventually, replacement.
It also strengthens India's broader ambition of becoming a serious space power with a substantial domestic industrial capability.
The relationship between the public and private sectors is therefore not merely commercial.
It is strategic.
If India is to maintain a resilient constellation, it must possess the industrial ability to replenish it.
14. Redundancy Is a Strategic Virtue
There is a tendency to regard redundancy as wasteful.
In ordinary civilian life, duplication may indeed appear inefficient. In national security, redundancy is often a virtue.
A surveillance network which possesses only one critical satellite may be highly capable but fragile. A constellation with multiple satellites may be less elegant on paper but considerably more resilient in practice.
This becomes increasingly important in an era of electronic warfare and anti-satellite technologies.
The objective is not to construct a system which can never be disrupted. No serious military planner should promise such a thing.
The objective is to construct a system which can continue functioning when individual components are degraded, jammed, damaged or unavailable.
That is the essence of resilience.
15. Mission Sudarshan Chakra and the Larger Defence Architecture
The term Mission Sudarshan Chakra has entered India's public strategic vocabulary in connection with a broader effort to strengthen integrated air and missile defence.
It would, however, be misleading to suggest that SBS-III and Mission Sudarshan Chakra are simply two names for the same programme.
SBS-III is a space-based surveillance programme. Its information can contribute to a wider national defence architecture, including early warning, intelligence and air-defence functions.
Reporting has described the intended integration of SBS-III information with air-defence assets and radars as part of the broader objective of shortening India's OODA loop.
The distinction is important because modern defence does not operate as a collection of isolated projects.
Satellites provide information.
Radars provide information.
Aircraft provide information.
Ground-based systems provide information.
Human analysts interpret information.
Command networks convert information into decisions.
Weapons act upon those decisions.
The ultimate objective is therefore not the satellite.
The objective is the network.
16. The Danger of the Shortened Warning Time
The second essay in this series considered the possibility of an adversary learning from an earlier encounter.
That principle applies here as well.
If India develops a better surveillance architecture, an intelligent adversary will attempt to make itself harder to see.
Camouflage may improve. Dispersal may increase. Decoys may become more sophisticated. Communications may be reduced or encrypted. Launch preparations may be concealed. Mobile systems may move more frequently.
Thus, the competition does not end when the satellite is launched.
The contest merely moves to another level.
One side improves its ability to see.
The other improves its ability to hide.
This is the perpetual contest between surveillance and concealment.
Technology rarely produces a final victory. It produces temporary advantages which provoke countermeasures.
17. The Geography of the Future
We may therefore return to the principal argument of Part 1.
Geography still matters.
Mountains matter. Oceans matter. Borders matter. Distance matters.
But technology is changing what those geographical facts mean.
A mountain range which once concealed a military movement may be observed from space. A naval formation which once disappeared beyond the horizon may be tracked through a combination of satellite imagery, maritime surveillance and other sensors. A missile launch which once became apparent only after the projectile had travelled a significant distance may increasingly be detected closer to its origin.
Geography has not disappeared.
Its strategic meaning is being rewritten.
18. The Race to See First
That brings us to the central proposition of this essay.
The next great contest in air and missile warfare may be decided not merely by who possesses the better interceptor, but by who possesses the better information architecture.
The interceptor remains indispensable.
But an interceptor without timely information is a weapon waiting for a target.
A radar without integration may see an object without understanding its significance.
A satellite without rapid processing may collect valuable imagery which becomes useful only after the moment of decision has passed.
The winning architecture therefore has to join the pieces together.
See.
Understand.
Decide.
Act.
And do so before the adversary completes the same cycle.
19. The 52 Satellites Are Only the Beginning
It would be tempting to regard the 52-satellite constellation as the final answer to India's surveillance requirements.
It is not.
It should instead be regarded as one important stage in a continuing process.
Satellites must be maintained. Ground stations must be protected. Data must be processed. Communications must remain secure. Artificial intelligence may assist analysts, but human judgement will remain indispensable. New sensors will emerge. Adversaries will develop countermeasures. Orbital congestion will increase. Space situational awareness will become increasingly important.
The constellation will therefore have to evolve.
The true measure of its success will not be the number of satellites launched.
It will be the quality, timeliness and reliability of the information delivered to those who have to make decisions.
20. Preparedness Without Alarm
There is a difference between strategic prudence and alarmism.
To discuss a vulnerability is not to declare that a catastrophe is imminent. To acknowledge an adversary's capability is not to diminish one's own strength. To prepare for a possibility is not to predict that the possibility will occur.
Indeed, the opposite is often true.
A nation which possesses the ability to see a threat early is better placed to deter it.
Deterrence is strengthened when an adversary understands that concealment is difficult, that preparations may be observed and that an attack is unlikely to achieve surprise.
In that sense, surveillance is not merely defensive.
It is also strategic signalling.
21. The Larger Lesson
The three essays in this series can now be brought together.
Part 1 examined the diminishing protective value of distance.
Part 2 examined the inevitability of adversarial learning.
Part 3 examines the answer to both: persistent awareness.
India cannot determine what another state may decide to do.
India cannot prevent technology from advancing.
India cannot assume that a tactic which failed yesterday will never be improved tomorrow.
But India can improve its ability to see.
It can improve its ability to interpret.
It can improve its ability to communicate.
It can improve its ability to decide.
And it can improve its ability to respond.
That is the deeper significance of India's investment in space-based surveillance.
The satellite is not the shield.
The information it provides helps the shield to become more effective.
22. Conclusion: The Eye Above the Battlefield
The great strategic change taking place above India is easy to overlook because the satellites themselves are invisible to the ordinary observer.
There is no column of tanks to see. No fighter formation necessarily passes overhead. No artillery barrage announces its arrival.
Yet hundreds of kilometres above the Earth, an entirely new dimension of strategic competition is taking shape.
India's SBS-III programme, with its planned constellation of 52 surveillance satellites, represents a substantial investment in that dimension. With 21 satellites assigned to ISRO and 31 to Indian private industry, the programme also reflects the growing connection between national security, space technology and domestic industrial capability.
The Sirsa interception during Operation Sindoor offers a useful illustration of why the question of early detection matters. India's existing air-defence architecture was able to identify and engage a high-speed ballistic threat before it could reach its reported target area. The next technological question is whether future space-based surveillance can extend that warning window still further.
The strategic objective is straightforward.
See the preparation.
Detect the launch.
Track the trajectory.
Understand the threat.
Pass the information swiftly.
Give the defensive system the opportunity to act.
Every second gained may matter.
Every additional observation may matter.
Every reduction in uncertainty may matter.
The future battlefield may still be fought on land, at sea and in the air. But increasingly, the battle for advantage will begin much earlier — in the acquisition and interpretation of information from space.
India's strategic depth may be changing.
India's technological depth must change with it.
The lesson is therefore neither fear nor complacency.
It is preparedness.
And above the battlefield, the first requirement of preparedness is simple:
To see.
Glossary
- AI — Artificial Intelligence
- Computer-based systems capable of performing tasks involving pattern recognition, analysis, prediction or decision support.
- Barak-8 / MRSAM
- A medium-range surface-to-air missile system jointly developed by India and Israel and employed by India's armed forces for air-defence purposes.
- EO — Electro-Optical
- Imaging systems which use visible or related portions of the electromagnetic spectrum to produce imagery.
- GEO — Geostationary Earth Orbit
- An orbit in which a satellite travels above the equator at the same angular rate as the Earth's rotation, allowing it to appear approximately stationary relative to a particular region.
- GEOINT — Geospatial Intelligence
- Intelligence derived from geographical information, imagery and associated data to understand locations, activities and patterns.
- ISR — Intelligence, Surveillance and Reconnaissance
- The collection and analysis of information required to understand an operational environment and support military decision-making.
- LEO — Low Earth Orbit
- A region of Earth orbit relatively close to the planet and widely used for Earth-observation satellites.
- OODA Loop
- Observe, Orient, Decide and Act — a conceptual model describing the cycle through which information is transformed into action.
- Persistent Surveillance
- Continuing or repeated observation of an area or activity over time rather than reliance upon isolated observations.
- Revisit Time
- The interval between successive opportunities for a satellite or constellation to observe a particular location.
- SAR — Synthetic Aperture Radar
- A radar imaging technique capable of producing detailed images of the Earth's surface and operating without dependence upon daylight.
- SBS-III — Space-Based Surveillance Phase III
- India's third phase of its space-based surveillance programme, involving a planned constellation of 52 satellites for enhanced land and maritime surveillance and related national-security applications.
- Sensor Fusion
- The process of combining information from different sensors and sources to produce a more complete and reliable understanding of a situation.
- Sensor-to-Shooter Loop
- The chain linking detection and identification of a target with the transmission of information required for an appropriate weapon or defensive system to engage it.
- SIGINT — Signals Intelligence
- Intelligence derived from electromagnetic signals and communications or other electronic emissions.
References
- Government of India, Press Information Bureau: Official Government of India information concerning Operation Sindoor and national defence.
- The Times of India: IAF's Sirsa unit fired Barak-8 last May to shoot down Pak ballistic missile that may have had Delhi as target .
- India Today: How air defence unit in Sirsa foiled Pak ballistic missile threat during Operation Sindoor .
- The Week: Barak-8: The unsung hero of Operation Sindoor that protected Delhi from Pak ballistic missile .
- The Economic Times: Operation Sindoor triggers India's space-shield push with 52 defence satellites by 2029 .
- The Times of India: Post Op Sindoor: India to fast-track launch of 52 defence surveillance satellites .
- The Times of India: Tracking threats before they reach the border: India's next line of defence taking shape in space .
- Defence Research and Development Organisation: Official DRDO website and defence research information .
- Indian Space Research Organisation: Official ISRO website .
Further Reading
- Part 1: Beyond the Border — A Sober Reflection on Major Madhan Kumar's Warning and the New Geography of Warfare
- Part 2: On the Prospect of a Second Reckoning — India's Strategic Preparedness in an Age of Learning Adversaries
- Defence Research and Development Organisation
- Indian Space Research Organisation
- Press Information Bureau, Government of India
Source note: Defence and strategic reporting can contain information derived from unnamed sources, preliminary assessments or material which is not independently verifiable in the public domain. This essay distinguishes between officially stated facts, reported developments and analytical interpretation wherever appropriate. Claims concerning operational capabilities should not be understood as classified or official military assessments.
Copyright
© Dhinakar Rajaram 2026. All rights reserved.
This essay may be shared for non-commercial educational and informational purposes with the author's name and the original article link retained. Reproduction, republication or commercial use of the complete article or substantial portions of it requires prior permission from the author.
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