Glossary A

Deutsch: Akustischer Absorber / Español: Absorbente acústico / Português: Absorvedor acústico / Français: Absorbeur acoustique / Italiano: Assorbitore acustico

Acoustic absorber in the space industry context refers to materials or systems designed to reduce sound pressure by absorbing sound energy, thus minimizing noise levels. This technology is crucial in spacecraft where controlling the acoustic environment is essential for crew comfort and equipment safety.

Deutsch: Akustische Lärmminderung / Español: Reducción de ruido acústico / Português: Redução de ruído acústico / Français: Réduction du bruit acoustique / Italiano: Riduzione del rumore acustico

Acoustic noise reduction refers to the methods and technologies used to minimize unwanted sound, particularly in environments where noise can affect the performance of equipment or the well-being of personnel. In the space industry, this involves reducing noise in spacecraft, launch vehicles, and ground facilities to protect sensitive instruments and ensure the safety and comfort of astronauts and engineers.

In the aerospace context, acquisition refers to the process of acquiring or obtaining something, such as a product, service, or technology. This process can involve a variety of activities, such as identifying a need, researching potential solutions, negotiating a price or terms, and finalizing the purchase or acquisition.

Deutsch: Signalakquisition / Español: Adquisición de señal / Português: Aquisição de sinal / Français: Acquisition du signal / Italiano: Acquisizione del segnale

Acquisition of signal (AOS) in the space industry context refers to the moment when a ground station first establishes communication with a spacecraft after a period of no communication. This term is crucial for tracking and controlling spacecraft, ensuring that data and commands are exchanged accurately and efficiently between Earth and the spacecraft.

Deutsch: Automatische Steuerungssoftware / Español: Software de Control Automático / Português: Software de Controle Automático / Français: Logiciel de Contrôle Automatique / Italiano: Software di Controllo Automatico /

In the aerospace context, ACS stands for "Attitude Control System." This system is responsible for controlling the orientation or attitude of a spacecraft or aircraft.

Deutsch: Aktion / Español: Acción / Português: Ação / Français: Action / Italiano: Azione

Action in the space industry context refers to any deliberate operation, manoeuvre, or sequence of steps taken to achieve specific objectives within a space mission or project. These actions can range from technical procedures like spacecraft propulsion burns and satellite deployments to strategic decisions affecting mission progress and project timelines.

The term "active" can have various meanings depending on the specific application. Generally, it refers to a system or component that is actively controlled or adjusted in real-time to achieve a desired outcome.

Deutsch: Aktive Aerodynamik / Español: Aerodinámica activa / Português: Aerodinâmica ativa / Français: Aérodynamique active / Italiano: Aerodinamica attiva

Active Aerodynamics in the space industry context refers to the use of systems that dynamically adjust the aerodynamic properties of spacecraft or launch vehicles to optimize performance and efficiency during flight. These systems actively modify the shape or surface of the vehicle in response to changing atmospheric conditions, flight attitudes, or speeds, aiming to minimize drag, improve stability, and control heating during re-entry into the Earth's atmosphere.

Deutsch: Aktives Steuerungssystem / Español: Sistema de Control Activo / Português: Sistema de Controle Ativo / Français: Système de Contrôle Actif / Italiano: Sistema di Controllo Attivo

Active Control System in the space industry context refers to a dynamic system used in spacecraft, satellites, and other space-related applications to manage and correct the vehicle's attitude and trajectory actively and in real-time. This system is crucial for ensuring that spacecraft can carry out their missions effectively, as it allows for precise adjustments to the vehicle's orientation and position through the use of onboard sensors and actuators.

Deutsch: Aktive Strömungssteuerung / Español: Control Activo de Flujo / Português: Controle Ativo de Fluxo / Français: Contrôle Actif de Flux / Italiano: Controllo Attivo del Flusso

Active Flow Control (AFC) in the space industry refers to techniques and technologies used to manipulate or control the flow of air, gases, or fluids around spacecraft, launch vehicles, or aerodynamic surfaces to enhance performance, reduce drag, improve stability, or manage heat. This dynamic approach to flow management involves the use of active devices such as jets, plasma actuators, or mechanical surfaces that can be adjusted in real time to respond to changing flight conditions or mission requirements.

Deutsch: Aktives Material / Español: Material activo / Português: Material ativo / Français: Matériau actif / Italiano: Materiale attivo

Active material in the space industry context refers to substances or materials that have a functional role in the operation and performance of space vehicles and equipment, particularly through their involvement in energy storage and generation systems. These materials are essential for a range of applications, from providing power to enabling various technological functions within spacecraft.

Deutsch: Aktive Geräuschunterdrückung / Español: Cancelación Activa de Ruido / Português: Cancelamento Ativo de Ruído / Français: Annulation Active du Bruit / Italiano: Cancellazione Attiva del Rumore

Active Noise Cancellation (ANC) in the space industry refers to the technology used to reduce or eliminate unwanted noise, such as vibrations, mechanical hums, or other acoustic disturbances within spacecraft, space habitats, or during launch operations. This technology uses sound waves to counteract unwanted noise by generating a sound wave of the same amplitude but with an inverted phase (anti-phase), effectively canceling out the noise through destructive interference. ANC is crucial for improving the comfort, safety, and performance of both crewed and uncrewed missions in the space industry.

Deutsch: Aktive Geräuschkontrolle / Español: Control activo de ruido / Português: Controle ativo de ruído / Français: Contrôle actif du bruit / Italiano: Controllo attivo del rumore

Active Noise Control (ANC) in the space industry context refers to the technology used to reduce unwanted sound through the addition of a second sound specifically designed to cancel the first. This technique is especially relevant in spacecraft and space station modules, where the control of noise levels is critical for the comfort and health of astronauts. ANC systems work by detecting the ambient noise with microphones, processing the sound to determine the appropriate cancellation signal, and then emitting this counter-sound through speakers, effectively neutralizing the unwanted noise.

Deutsch: Aktive Optik / Español: Óptica activa / Português: Óptica ativa / Français: Optique active / Italiano: Ottica attiva

Active optics in the space industry context refers to a technology used in telescopes and other optical systems to improve image quality by continuously adjusting the shape and position of optical elements in real-time. This system is crucial for compensating for optical aberrations and environmental effects that can distort images, particularly in space where precise observations are essential.

Deutsch: Aktiver Raum / Español: Espacio Activo / Português: Espaço Ativo / Français: Espace Actif / Italiano: Spazio Attivo /

Active space refers to the region of space where a spacecraft or satellite can maneuver and maintain its position or orbit. It is an important concept in aerospace engineering because it defines the operational limits of a spacecraft and influences mission planning and spacecraft design. In this article, we will explore what active space is and provide examples of its application in different aerospace scenarios.

Deutsch: Aktive Temperaturkontrolle / Español: Control térmico activo / Português: Controle térmico ativo / Français: Contrôle thermique actif / Italiano: Controllo termico attivo

Active Thermal Control in the space industry context refers to systems designed to maintain the temperature of spacecraft, satellites, and space stations within safe operational limits through active management. These systems dynamically regulate the internal and external temperature of space vehicles to protect sensitive equipment and ensure the comfort and safety of astronauts. Active thermal control involves the use of mechanical, electrical, and fluid-based technologies to transfer heat from warmer to cooler areas or vice versa, depending on the thermal requirements of the mission.

Deutsch: Aktiver Transport / Español: Transporte activo / Português: Transporte ativo / Français: Transport actif / Italiano: Trasporto attivo

Active transport in the space industry context refers not to biological processes, but rather to the active movement and management of materials, components, or personnel within, to, or from space environments. This term encompasses the methods and systems used to transport objects against gravitational forces or other environmental challenges, using energy in the form of propulsion systems.

In the aerospace industry, "activity" can refer to a wide range of tasks, processes, and operations that are related to the design, development, manufacturing, testing, and maintenance of aircraft and spacecraft, as well as the operation and support of these systems.

Actuation refers to the process of activating or controlling a device or system by means of an external force or signal. Actuation systems are used in a variety of aerospace applications to control the movement or position of mechanical components, such as flaps slats, and other control surfaces.

In the aerospace context, an actuator is a device that converts energy into motion in order to perform a specific task. Actuators are used to control and move various parts of aircraft and spacecraft, such as flaps, rudders, and landing gear. They are typically powered by hydraulic, pneumatic, or electrical systems, and may be controlled by electronic or mechanical means.