🛰️ Advanced Diploma
Satellite Communication

📚 Modules

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Student: Advanced SatCom Student

ID: ADS20261911

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Level: 1

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12) Ground Segment & Network Operations

🛰️ Satellite Subsystems — Bus and Payload
SATELLITE ARCHITECTURE BUS (spacecraft platform) • Structure — chassis, panels, thermal • Power — solar arrays, batteries, PCU • Attitude Control (AOCS) reaction wheels, star trackers, gyros • Propulsion — chemical, electric • Thermal Control — radiators, heaters • Telemetry, Tracking & Command (TT&C) • Data Handling — on-board computer Typical bus lifetime 10–15 years for GEO LEO mega-constellation: 5–7 years per satellite Mass budget: 500 kg (small GEO) to 7 000 kg (large HTS) Power budget: 5 kW – 25 kW at EOL PAYLOAD (mission-specific) • Antennas — parabolic, phased arrays • Transponders — receive, shift, amplify • LNAs, HPAs, TWTAs, SSPAs • Filters, multiplexers, switches • Digital processors — channelisation • Beam-forming networks for HTS • Inter-satellite links (ISL) • Optical terminals for crosslinks Bent-pipe: transparent — no demodulation Regenerative: on-board demod + remod + FEC HTS: 20–100+ spot beams, Ka/Ku bands Throughput: hundreds of Gbps per HTS satellite
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📖 Theory – 12) Ground Segment & Network Operations

I. Ground Segment Roles
• Connect satellite network to terrestrial core.
• Manage user sessions and billing.
• Monitor satellite health.
• Support handover in LEO networks.

II. Satellite Operations Centre (SOC)
• Monitors all satellites 24/7.
• Issues commands.
• Manages fuel budget.
• Handles anomalies and safe modes.

III. Network Operations Centre (NOC)
• Manages the network of earth stations.
• Monitors link quality and capacity.
• Configures routing, QoS.
• Manages spectrum and interference.

IV. Ground Segment as a Service
• Cloud-based virtualisation of modems.
• Software-defined ground stations.
• Multi-tenant, shared infrastructure.
• Reduces cost.

V. Interconnection
• Peering with terrestrial ISPs.
• Data centres and cloud on-ramps.
• Content delivery networks.
• Secure government enclaves.

VI. Operational Challenges
• Coordination of thousands of satellites.
• Handover every few minutes in LEO.
• Rain fade and link adaptation.
• Cyber security of ground infrastructure.

🏆 Level 1

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🛰️ 0 MCQs
📝 0 essays 🧪 0 labs 🏅 0 badges

📝 Advanced Essay (AI-Marked)

Question:
Critically analyse the architecture and operation of the satellite ground segment. Discuss the roles of the SOC and NOC, the virtualisation of ground infrastructure, and the operational challenges of managing LEO mega-constellations.
📋 Rubric: Knowledge (30%) · Analysis (30%) · Literature (20%) · Structure (10%) · Originality (10%). 1500–2500 words.

📝 Practice MCQs (15)

Q1: How does Network operations centre differ from alternatives?

Q2: What are the limitations of Gateway?

Q3: Why is Software-defined ground important?

Q4: What are the limitations of Cloud-based modem?

Q5: Why is Peering important?

Q6: Explain Network operations centre in satellite communication.

Q7: Explain Handover in satellite communication.

Q8: How does Software-defined ground differ from alternatives?

Q9: What are the limitations of Handover?

Q10: Explain Gateway in satellite communication.

Q11: What are the limitations of Ground segment as a service?

Q12: What is Network operations centre?

Q13: Explain CDN in satellite communication.

Q14: Explain Teleport in satellite communication.

Q15: What are the limitations of Software-defined ground?

Module score: 0/0