Key Points Measures signal strength relative to noise Used to judge link quality Common in satellite and RF systems Determines whether a link can support the intended modulation and coding Link performance is limited by how much useful carrier power…
Key Points Processing occurs on the platform itself rather than relying entirely on ground processing Used in satellite payloads, spacecraft systems, and remote platforms Supports local decision-making, routing, signal regeneration, and control functions Reduces ground dependence and enables faster local…
Key Points Supports fleet coordination and safety across coastal and offshore operations Often operates in remote or coastal waters with coverage gaps Must balance cost sensitivity, equipment durability, and reliable service delivery Operates in harsh marine environments with motion, weather,…
Key Points Follows a moving target by adjusting azimuth, elevation, or beam direction Used in satellite communications, radar, and Aviation systems Supports continuous pointing alignment as target position changes Combines mechanical and electronic control mechanisms Maintains link quality during target…
Key Points Dissipates heat through radiation Common in spacecraft thermal design Works with internal heat sources and thermal paths Sized and placed to balance thermal rejection with environmental exposure Passive thermal control mechanism without active cooling Definition Radiator Panel is…
Key Points Stores angular momentum in a continuously spinning rotor Provides passive attitude stability and active attitude control Requires momentum unloading when approaching saturation limits Subject to mechanical wear, vibration, and torque capacity constraints Essential for long-duration precision pointing missions…
Key Points Uses magnetic field interaction to generate control torque Applies torque through a coil or rod carrying electrical current Does not require conventional propellant Often used for spacecraft detumble and momentum unloading Suitable for small satellites and attitude control…
Key Points Distributes safety-critical navigation notices to vessels Supports route safety and situational awareness Enables hazard information delivery through broadcast, digital, or shore-to-vessel communication Supports Maritime safety systems, navigation services, and fleet operations Definition Navigational Warning Dissemination is the distribution…
Key Points Supports distance or delay measurement Used in satellite and RF systems Helps calibrate timing and propagation paths Transmits a known pattern or carrier for detection and comparison Underpins timing, localization, and link calibration Definition Ranging Signal is a…
Key Points Accounts for hostile or degraded RF conditions Emphasizes survivability and resilience Relevant to military and security-sensitive links Combines resilient modulation, redundancy, encryption, and spectrum management Definition Contested Environment Communications is communications designed to continue operating when interference, jamming,…
