SATCOM

Why is SATCOM particularly beneficial for international or oceanic flights?

• High-speed Wi-Fi from local towers

• Fiber-based connections from ground networks

• Satellite coverage extends across remote regions

• Land-based antennas track moving aircraft

What is a common trade-off of using GEO satellites for SATCOM?

• Extremely high speeds but weak signal strength

• Immediate coverage with limited data capacity

• Broad area coverage but with higher latency

• Precise tracking but unstable signal paths

What is the typical latency experienced with GEO satellites?

• Under 50 milliseconds

• Around 100 milliseconds

• Between 300–500 milliseconds

• Around 600 milliseconds

Which combination correctly pairs SATCOM features with their satellite type?

• GEO – low orbit, low delay; LEO – broad coverage, high delay

• GEO – stationary, broad area; LEO – fast response, limited area

• GEO – fast data, frequent handoff; LEO – constant orbit, high lag

• GEO – mobile path, low data rate; LEO – wide beam, steady signal

What is a notable limitation of LEO satellite systems in SATCOM?

• Require many satellites to maintain continuous coverage

• Can’t provide coverage over remote or maritime zones

• Deliver fast speeds but with unreliable antennas

• Function only at night due to orbital shadows

What is a key advantage of MEO satellites compared to LEO satellites in SATCOM systems?

• Lower latency and faster speeds

• Greater visibility time and coverage area

• More fixed positioning with geostationary orbit

• Higher altitude with reduced signal strength

Which of the following best distinguishes MEO satellites from GEO satellites?

• MEO satellites maintain a constant position over Earth

• GEO satellites orbit lower and move faster

• MEO satellites are non-stationary and closer to Earth

• GEO satellites provide shorter visibility windows

What is the primary method ATG systems use to deliver internet to aircraft?

• Direct satellite beam from geostationary satellites

• Signal relay from oceanic radar and weather systems

• Ground-based cellular towers communicating with onboard antennas

• Aircraft-mounted boosters connecting to onboard satellite dishes

Why is ATG Wi-Fi generally limited to land-based coverage areas?

• It relies on tower signals not built over oceans

• It connects only to satellites with weak global coverage

• It cannot pass through aircraft fuselage over water

• It is blocked by interference from sea-level transmissions

What is the primary purpose of deploying Molniya orbit satellites?

• To enhance signal coverage at the equator

• To reduce orbital decay in low-altitude orbits

• To provide strong elevation and signal quality at high latitudes

• To eliminate interference caused by cell towers