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 Moves beam capacity in time Allocates coverage dynamically Used in flexible satellite systems Improves capacity allocation and operational efficiency Requires timing coordination and beam point accuracy Adds payload control complexity Definition Beam Hopping is the dynamic activation or…
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 Physically separates the system from outside networks Reduces exposure to remote intrusion paths Used where strict isolation is required Relies on physical separation rather than logical segmentation Requires manual data transfer procedures and controlled maintenance access Used in…
Key Points Checks whether data integrity has been affected Used before correction or retransmission Common in communication and storage systems Often implemented with parity, checksums, or CRCs Used in communication protocols, storage systems, file formats, and safety-critical data paths Definition…
Key Points Defines measurable service commitments Used between providers and customers Often includes availability and response targets Supports accountability and operational planning Definition Service Level Agreement is a formal agreement that defines service targets, responsibilities, and performance expectations between parties.…
Key Points Uses outputs to understand internal state Common in operations and software systems Depends on metrics, logs, and traces Supports troubleshooting and analysis Enables operators and tools to reconstruct behavior and identify anomalies Definition Observability is the ability to…
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 Provide numerical evidence for state or performance Used in monitoring and analysis Can describe technical or business behavior Important in operations and assurance Enable data-driven operational decisions rather than assumption-based decisions Require careful selection to avoid measuring the…
