Key Points Manages orientation rather than position Uses sensors and actuators for correction Important for pointing antennas, solar panels, and instruments Core function in spacecraft and flight systems Relies on measurement, control logic, and actuation to hold or change orientation…
Key Points Provides stable reference frequency for conversion Used in transmit and receive chains Quality strongly affects conversion stability, purity, and spectral behavior Affects phase noise and frequency stability Used in radios, satellite systems, and microwave equipment Definition Local Oscillator…
Key Points Transfers service after failure or planned maintenance Supports continuity and resilience in distributed systems Used in networks, servers, cloud platforms, and control systems Can be automatic or manual Requires fault detection, backup readiness, and state synchronization Failure modes…
Key Points Includes hardware for thrust generation, propellant tanks, valves, thrusters, and feed lines Manages propellant flow and maneuvering through coordinated control logic Supports orbit and attitude control functions Essential for trajectory maintenance and changes in spacecraft operations Definition Propulsion…
Key Points Marks the outer service boundary of a beam Signal quality often declines near the footprint edge Important in coverage planning and beam design Affected by power, antenna pattern, and propagation conditions Users near the edge may experience weaker…
Key Points Broad directional beam used to cover a larger geographic area Used in satellite communications and related system contexts Provides wide-area service coverage where narrow beams are not needed Trades concentrated power for geographic reach Definition Wide Beam is…
Key Points Angle describing the tilt of an orbit relative to a reference plane Used in orbital mechanics, satellite design, and constellation planning Influences ground track and geographic coverage of satellites Distinct from altitude or eccentricity Definition Inclination is the…
Key Points Uses virtual circuits for logical paths through shared provider networks Historically important in enterprise WANs and carrier networks Carries frames across shared networks without dedicated physical circuits Predecessor to modern Ethernet-based and MPLS-based transport systems Emphasized simple frame…
Key Points Represents maximum theoretical service rate under favorable conditions Used in carrier and access planning May exceed committed or average rates Important for burst capacity analysis Often misunderstood as a guaranteed or typical rate Definition Peak Information Rate is…
Key Points Controls directional signal patterns Used in transmit and receive arrays Improves gain or interference rejection Common in wireless and satellite systems Can be applied on transmit, receive, or both Works by adjusting phase, amplitude, or timing across antenna…
