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Question 20285
JEE Physics · Hard

Principles of Communication: Satellite Communication MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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Satellite CommunicationHardQuestion 20285

Question

LEO (Low Earth Orbit) satellites at 500–2000 km altitude are preferred for some applications over GEO satellites because they have:
  1. A
    Continuous coverage from a single satellite
  2. B
    Much lower latency (~5–15 ms vs 250 ms)
    Correct
  3. C
    Higher operating frequency
  4. D
    Simpler ground tracking

Correct answer

Much lower latency (~5–15 ms vs 250 ms)

Explanation

LEO: altitude 500–2000 km → propagation delay 5–15 ms → ideal for latency-sensitive applications (Starlink broadband, Iridium voice). Disadvantage: each satellite passes overhead in minutes → need large constellations (Starlink: ~5000 satellites) for continuous coverage.

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