Satellite Internet
Why Ground-Based Networks Can Be Economically Unviable
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Infrastructure dependency – relies on cables, optical fibres, and towers.
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Economic limitations – high installation cost in sparsely populated or remote regions; poor return on investment.
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Disaster vulnerability – floods, earthquakes, or storms can disrupt connectivity.
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Mobility gap – inadequate for moving platforms (ships, aircraft) or temporary setups.
Why Satellite Internet is Needed
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Provides global coverage, independent of terrain or terrestrial infrastructure.
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Rapid deployment during disasters, emergencies, or conflict.
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Reliable for remote locations (Siachen Glacier, offshore rigs).
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Ensures mobility-based connectivity for transportation, defence, and tourism.
Dual Nature of Satellite Internet
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Civil applications – broadband for rural areas, disaster management, telemedicine, agriculture, logistics.
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Military/Strategic use – coordination in conflict zones, drone operations, real-time surveillance.
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Security risks – misuse by insurgents, criminal networks, cross-border smuggling.
Components of Satellite Internet
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Space Segment – satellites in orbit (communication payloads).
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Ground Segment – user terminals, ground stations, network control systems.
Three Main Orbits for Deployment
| Orbit | Altitude | Features | Examples | Pros | Cons |
|---|---|---|---|---|---|
| GEO (Geostationary Earth Orbit) | 35,786 km | Stationary over one point; large satellites | Viasat GX | Wide coverage (⅓ of Earth), stable link | High latency (~600 ms), unsuitable for real-time apps |
| MEO (Medium Earth Orbit) | 2,000–35,786 km | Fewer satellites than LEO, lower latency than GEO | O3b | Balance of coverage & latency | Still needs constellation, costly |
| LEO (Low Earth Orbit) | <2,000 km | Small, fast-moving satellites | Starlink | Low latency (~20–40 ms), smaller/cheaper satellites | Small coverage area, needs mega-constellation |
Mega-Constellations – How They Work
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Hundreds/thousands of LEO satellites in coordinated orbits.
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On-board processing – improves efficiency, reduces terminal complexity.
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Optical inter-satellite links – satellites talk to each other without always relying on ground stations.
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Seamless hand-offs – antennas track and switch between satellites every few minutes.
Applications
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Civil – rural broadband, smart cities, IoE, precision farming, tourism, environmental monitoring.
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Transport – connected vehicles, improved navigation, logistics management.
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Defence – real-time troop coordination, surveillance, communication in remote bases.
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Disaster Relief – backup when terrestrial networks fail.
Cost Factor
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Currently more expensive than terrestrial broadband:
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User terminal: ~$500
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Monthly plan: ~$50
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Price justified in remote or high-importance sectors; costs may drop with wider adoption.
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Direct-to-smartphone tech (AST SpaceMobile, Starlink) could remove need for terminals in future.
Strategic Significance for India
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Bridge the digital divide in rural/tribal regions.
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Enhance disaster readiness and border defence communication.
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Reduce dependency on foreign systems by developing indigenous satellite internet.
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Participate in international regulation of mega-constellations.
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