Cross-Industry

Spacecraft A spacecraft is a hardware platform intended to operate in the space environment and perform a mission such as communications, sensing, navigation, or experimentation. It includes the structural, power, control,… Hardware Spectral Efficiency Spectral Efficiency is the amount of useful information transmitted per unit of spectrum, usually expressed as bits per second per hertz. It measures how effectively spectrum is converted into usable… Concept/Framework Spectrum Spectrum is the range of electromagnetic frequencies used for communication, sensing, and other radio-related functions. It is the underlying resource for wireless systems. Concept/Framework Spot Beam Spot Beam is a narrow, focused satellite or radio beam that concentrates energy on a limited geographic area. It provides localized coverage with higher directional gain. Hardware State Estimation State Estimation is the inference of a system's internal state from measured data, model behavior, or both. It estimates what cannot be directly observed. Operations Stateful Inspection Stateful Inspection is security inspection that evaluates traffic in the context of an existing connection or session state. It uses remembered context to guide policy. Software Stateless Communication Stateless Communication is communication in which each message is handled independently without relying on stored session context. Protocol Station Keeping Station Keeping is the operational process of maintaining a spacecraft or satellite within its assigned orbital position and attitude limits through periodic maneuvers and corrections. Operations Subnet Mask Subnet Mask is a bitmask used to separate the network and host portions of an IP address in IPv4 and similar address structures. It defines the subnet boundary. Protocol Sun Sensor Sun Sensor is an attitude sensor that determines spacecraft orientation by detecting the direction of the Sun and translating that measurement into an angular reference for the spacecraft. Hardware