Glossary H

A helicopter is a type of rotorcraft in which lift and thrust are supplied by horizontally spinning rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward and laterally.

Deutsch: Heliosphäre / Español: Heliosfera / Português: Heliosfera / Français: Héliosphère / Italiano: Eliosfera

Heliosphere in the space industry context refers to the vast bubble-like region of space that is influenced by the solar wind and magnetic field of the Sun. This region encompasses the entire solar system and extends far beyond the orbit of Pluto, acting as a shield against cosmic radiation from interstellar space.

Helium is a chemical element with the symbol He and atomic number 2. Helium is the second lightest element, consists of two protons, two neutrons and two electrons. Eight percent of the atoms in the universe are helium.

Deutsch: Hemisphäre / Español: hemisferio / Português: hemisfério / Français: hémisphère / Italiano: emisfero

Hemisphere in the space industry context refers to half of a spherical celestial body, such as a planet, moon, or star. The term is typically used to describe the division of these bodies into northern and southern hemispheres or eastern and western hemispheres. This division is crucial for various aspects of space missions, planetary science, and astronomical observations.

Deutsch: Hertz / Español: Hertz / Português: Hertz / Français: Hertz / Italiano: Hertz

Hertz (Hz) in the space industry context refers to the unit of frequency in the International System of Units (SI), used to measure the number of cycles per second of a periodic phenomenon. This is especially relevant in terms of electromagnetic waves, including radio waves, which are extensively used for communication with and between spacecraft, satellites, and ground stations. One hertz represents one cycle per second. In space communications, frequencies are crucial for transmitting data, voice, and video across vast distances, with different frequency bands (measured in kilohertz (kHz), megahertz (MHz), and gigahertz (GHz)) serving specific purposes based on their propagation characteristics and the regulatory frameworks governing their use.

In the aerospace context, a hexapod is a type of robotic mechanism that has six legs, each of which can move independently. Hexapods are used in a variety of aerospace applications, including testing and simulation, payload handling, and maintenance tasks.

"Hi-Rel" stands for "High Reliability". It refers to the design, testing, and manufacturing practices that are used to ensure the reliability and performance of aerospace systems and components.

Deutsch: Hohe Kosten / Español: Altos Costes / Português: Altos Custos / Français: Coûts Élevés / Italiano: Alti Costi

High Costs in the space industry refer to the substantial financial expenditures required for designing, developing, launching, and maintaining space missions and infrastructure. These costs include research and development, manufacturing of spacecraft and rockets, launch operations, mission control, and ongoing maintenance and support.

Deutsch: Hochredundante Betätigung / Español: Actuación de alta redundancia / Português: Atuação de alta redundância / Français: Actionnement à haute redondance / Italiano: Attuazione ad alta ridondanza

High Redundancy Actuation refers to a system design approach in which multiple actuators are used to perform the same function, ensuring that the overall system remains operational even if one or more actuators fail. This approach is crucial for enhancing the reliability and safety of space missions, where equipment failure can have severe consequences.

Deutsch: Hochauflösend / Español: Alta definición / Português: Alta definição / Français: Haute définition / Italiano: Alta definizione

High-definition in the space industry context refers to the use of advanced imaging and data collection technologies that provide exceptionally clear and detailed visuals. This encompasses high-definition cameras, sensors, and telescopes used in satellites, space probes, and rovers to capture images and videos of celestial bodies, space environments, and Earth with high resolution and clarity.

Deutsch: Hochleistung / Español: Alta potencia / Português: Alta potência / Français: Haute puissance / Italiano: Alta potenza

High-power in the space industry context generally refers to systems or components that operate at or are capable of handling significantly higher levels of electrical power compared to standard systems. This term can apply to various domains within aerospace, including propulsion systems, satellite communications, and payload instruments, where increased power levels are required for enhanced performance and capabilities.

High-reliability (Hi-rel) refers to the ability of a system, component, or process to perform its intended function consistently and with a low probability of failure. High reliability is especially important in the aerospace industry because of the critical nature of the systems and processes involved and the potential consequences of failures.

Deutsch: Hochauflösung / Español: Alta resolución / Português: Alta resolução / Français: Haute résolution / Italiano: Alta risoluzione /

High resolution refers to the level of detail and precision in an image, measurement, or data. High resolution means that the image, measurement, or data is able to distinguish between small or fine details.

Deutsch: Hindenburg / Español: Hindenburg / Português: Hindenburg / Français: Hindenburg / Italiano: Hindenburg

The Hindenburg in the space industry context typically refers to the infamous Hindenburg disaster, a catastrophic airship explosion in 1937. While this event itself is not directly related to space exploration, the term Hindenburg is often used metaphorically to describe major engineering failures or accidents in aerospace, particularly those with tragic outcomes. It serves as a cautionary tale about the risks of cutting-edge technology, safety protocols, and the public impact of high-profile disasters.

HiRel --->High-Reliability

HOGE --->Hover out of ground effect

Deutsch: Hebevorrichtung / Español: Polipasto / Português: Guindaste / Français: Treuil / Italiano: Argano

A hoist is a mechanical device used to lift and move heavy objects. In the space industry, hoists are essential tools for handling and assembling spacecraft, satellites, and other heavy components during construction, testing, and launch preparation.

In the aerospace context, "hold-down" generally refers to devices or systems that are used to secure or hold down equipment or cargo during transport or storage. These systems are designed to prevent movement or shifting of the equipment or cargo, which could potentially cause damage or accidents.

Deutsch: Hohlraum im Kontext der Raumfahrtindustrie / Español: Hueco en el contexto de la industria espacial / Português: Oco no contexto da indústria espacial / Français: Creux dans le contexte de l'industrie spatiale / Italiano: Vuoto nel contesto dell'industria spaziale

Hollow in the space industry context refers to structural features or components that are designed with empty spaces or cavities within them. These hollows are often intentional and serve various purposes, such as reducing weight, housing instruments, or improving the efficiency of materials used in spacecraft and satellite construction.

Deutsch: Schweben außerhalb des Bodeneffekts / Español: Flotar Fuera del Efecto Suelo / Português: Flutuar Fora do Efeito Solo / Français: Vol Hors Effet de Sol / Italiano: Volo Fuori dall'Effetto Suolo /

The Hover out of ground effect (HOGE) is hovering at greater than one rotor diameter from the ground where re is no interaction between rotor downwash and the ground.