Non-Terrestrial

Ranging Signal Ranging Signal is a signal used to measure distance, timing, or propagation characteristics between endpoints or within a communications system. It provides a reference for ranging or calibration. Protocol Reaction Wheel Reaction Wheel is an attitude control device that changes a spacecraft's orientation by accelerating or braking an internal spinning mass, providing propellant-free pointing control through conservation of angular momentum. Hardware Redundant Subsystem Redundant Subsystem is a backup or duplicate subsystem that can maintain or restore function if the primary subsystem fails. It adds fault tolerance through duplication. Hardware Regenerative Payload Regenerative Payload is a payload architecture that demodulates, processes, and remodulates signals within the payload before retransmission. Hardware Relay A relay is a communications element that receives a signal and transmits it again toward the destination or next hop. It may operate as an amplifier, repeater, regenerator, or packet-forwarding… Hardware RF Engineering RF engineering is the practice of designing and optimizing systems that use radio-frequency energy to carry information or sense the environment. It includes antenna systems, propagation analysis, power budgets, spectrum… Concept/Framework RF Obstruction RF obstruction is a physical condition in which terrain, structures, or other objects interfere with the propagation of radio waves. It degrades link quality by blocking, reflecting, scattering, or absorbing… Concept/Framework Satcom Hardening Satcom Hardening is the strengthening of satellite communications systems against faults, interference, environmental exposure, and security threats. It improves operational resilience. Concept/Framework Satellite Capacity Satellite capacity is the amount of communications demand that a satellite system can serve within its technical and operational limits. It is bounded by spectrum, power, beam allocation, modulation, and… Concept/Framework Satellite Communications Satellite communications is a communications architecture in which user traffic is relayed via satellites between remote endpoints and terrestrial network infrastructure. The system includes the user terminal, the space segment,… Concept/Framework