India’s remote sensing satellites can spot a failing crop from orbit. What they can’t do is carry a phone call.
🏛️ Must Know
What IRS Satellites Are Actually Used For
- Crop Productivity Assessment IRS satellites are genuinely used to assess crop productivity across large agricultural regions.
- Locating Groundwater They are also used for locating groundwater resources, by reading surface signatures linked to underground water.
- Mineral Exploration IRS data helps identify mineral-bearing zones by detecting specific surface signatures.
- Not Telecommunications or Traffic Studies IRS satellites are not designed for telecommunications, which uses geostationary satellites instead, nor are they the primary tool for traffic studies.
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Why IRS Satellites Can’t Do Telecom
- Different Orbit, Different Job IRS satellites typically fly in sun-synchronous polar orbits, built for imaging, not for relaying communication signals.
- Telecom Needs Geostationary Satellites Telecommunications instead relies on geostationary satellites that stay fixed relative to a point on Earth.
- India’s Own Long-Running Programme India has operated its IRS satellite series since the 1980s, among the world’s largest constellations of remote sensing satellites.
📝 Previous Year Questions
UPSC CSP 2015 — What IRS Satellites Are Actually Used For
- UPSC 2015 IRS satellites are used for crop productivity assessment, locating groundwater, and mineral exploration. They are not used for telecommunications or traffic studies. See UPSC CSP 2015 GS Paper I, Q71. View this question.
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🌟 Great to Know
Why This Data Matters Beyond Farming
- Disaster Response Too IRS data also supports flood mapping, forest-fire tracking, and disaster response planning across India.
- Feeds Government Planning Ministries use IRS-derived data for land-use planning, water-resource management, and urban expansion monitoring.
- Connects to Other PYQ Facts This same satellite-application distinction also underlies UPSC questions on geostationary versus polar-orbit satellite uses.
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