13) Regulation, Spectrum & Policy

🌍 Orbit Regimes β€” LEO, MEO, GEO and HEO
EARTH LEO 160–2000 km MEO 2 000–20 000 km GEO 35 786 km HEO (e.g. Molniya) Key trade-offs β€’ LEO β€” low latency (~5–20 ms), small footprint, many sats needed β€’ MEO β€” moderate latency (~50–100 ms), navigation & some voice β€’ GEO β€” ~240 ms latency, single continental coverage, fixed dish β€’ HEO β€” high-latitude coverage, elliptical, slow near apogee Kepler's third law TΒ² = (4π² / ΞΌ) Β· aΒ³ β€” orbital period grows with semi-major axis ΞΌ Earth = 398 600 kmΒ³/sΒ²
β–Ά Play Slideshow (Voice ON)
πŸ“– Theory – 13) Regulation, Spectrum & Policy

I. The ITU
β€’ UN agency coordinating global spectrum.
β€’ Radio Regulations β€” international treaty.
β€’ World Radiocommunication Conference (WRC) every 3–4 years.

II. ITU-R and ITU-T
β€’ ITU-R β€” radiocommunication, satellite allocations.
β€’ ITU-T β€” telecom standards.
β€’ Recommendations underpin equipment design.

III. National Regulators
β€’ Ofcom, FCC, ACMA, TRAI.
β€’ Licence satellite networks, earth stations.
β€’ Coordinate with ITU and neighbours.

IV. Frequency Coordination
β€’ Advance publication β†’ coordination request.
β€’ Protects existing services.
β€’ PFD and EPFD limits.

V. Orbital Slots
β€’ GEO slots are scarce and ITU-managed.
β€’ Filing and realisation deadlines.
β€’ LEO constellations file entire shells.

VI. Emerging Issues
β€’ Mega-constellations and congestion.
β€’ Space debris mitigation.
β€’ Cyber security of satellite networks.
β€’ Quantum key distribution.

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πŸ“ Advanced Essay (AI-Marked)

Question:
Critically analyse the regulatory framework governing satellite communication. Discuss the ITU, national regulators, spectrum coordination, orbital slot management, and the emerging policy challenges posed by LEO mega-constellations and space sustainability.
πŸ“‹ Rubric: Knowledge (30%) Β· Analysis (30%) Β· Literature (20%) Β· Structure (10%) Β· Originality (10%). 1500–2500 words.

πŸ“ Practice MCQs (15)

Q1: What are the limitations of WRC?

Q2: How does WRC differ from alternatives?

Q3: How does Ofcom differ from alternatives?

Q4: What is Ofcom?

Q5: How does ITU differ from alternatives?

Q6: What are the limitations of ITU?

Q7: How does ITU-T differ from alternatives?

Q8: Explain EPFD in satellite communication.

Q9: Explain Radio Regulations in satellite communication.

Q10: How does Advance publication differ from alternatives?

Q11: How does Radio Regulations differ from alternatives?

Q12: Explain Coordination request in satellite communication.

Q13: Explain PFD in satellite communication.

Q14: What is EPFD?

Q15: What is Orbital slot?

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