Explore topic-wise fullforms in Space Science

INFO: Full form for HAD is Heat-actuated Device in Space Science category
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INFO: Full form for HCR is High Cross Range in Space Science category
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A directional antenna or beam antenna is an antenna which radiates or receives greater power in specific directions allowing increased performance and reduced interference from unwanted sources. Directional antennas provide increased performance over dipole antennas—or omnidirectional antennas in general—when greater concentration of radiation in a certain direction is desired.

A high-gain antenna (HGA) is a directional antenna with a focused, narrow radiowave beam width, permitting more precise targeting of the radio signals. Most commonly referred to during space missions, these antennas are also in use all over Earth, most successfully in flat, open areas where there are no mountains to disrupt radiowaves. By contrast, a low-gain antenna (LGA) is an omnidirectional antenna with a broad radiowave beam width, that allows the signal to propagate reasonably well even in mountainous regions and is thus more reliable regardless of terrain. Low-gain antennas are often used in spacecraft as a backup to the high-gain antenna, which transmits a much narrower beam and is therefore susceptible to loss of signal.

All practical antennas are at least somewhat directional, although usually only the direction in the plane parallel to the earth is considered, and practical antennas can easily be omnidirectional in one plane. The most common types are the Yagi antenna, the log-periodic antenna, and the corner reflector antenna, which are frequently combined and commercially sold as residential TV antennas. Cellular repeaters often make use of external directional antennas to give a far greater signal than can be obtained on a standard cell phone. Satellite television receivers usually use parabolic antennas. For long and medium wavelength frequencies, tower arrays are used in most cases as directional antennas.

A hangar is a closed building structure to hold aircraft or spacecraft. Hangars are built of metal, wood, or concrete. The word hangar comes from Middle French hanghart ("enclosure near a house"), of Germanic origin, from Frankish *haimgard ("home-enclosure", "fence around a group of houses"), from *haim ("home, village, hamlet") and gard ("yard").

Hangars are used for protection from the weather, direct sunlight and for maintenance, repair, manufacture, assembly and storage of aircraft.

INFO: Full form for GUL is Gse (government Support Equipment) Utilization List in Space Science category
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INFO: Full form for HAA is High Altitude Abort in Space Science category
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Atmospheric satellite (United States usage, abbreviated atmosat) or pseudo-satellite (British usage) is a marketing term for an aircraft that operates in the atmosphere at high altitudes for extended periods of time, in order to provide services conventionally provided by an artificial satellite orbiting in space.

Atmospheric satellites remain aloft through atmospheric lift, either aerostatic/buoyancy (e.g., balloons) or aerodynamic (e.g., airplanes). By contrast, conventional satellites in Earth orbit operate in the vacuum of space and remain in flight through centrifugal force derived from their orbital speed.

To date, all atmosats have been unmanned aerial vehicles (UAVs).

INFO: Full form for GWA is General Work Area in Space Science category
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INFO: Full form for HAK is Horizontal Access Kit in Space Science category
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Injection or injected may refer to:

INFO: Full form for ILA is Instrument Landing Approach in Space Science category
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INFO: Full form for BLV is Bleed Valve in Space Science category
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INFO: Full form for AUL is Air University Library in Space Science category
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An auxiliary power unit (APU) is a device on a vehicle that provides energy for functions other than propulsion. They are commonly found on large aircraft and naval ships as well as some large land vehicles. Aircraft APUs generally produce 115 V AC voltage at 400 Hz (rather than 50/60 Hz in mains supply), to run the electrical systems of the aircraft; others can produce 28 V DC voltage . APUs can provide power through single or three-phase systems.

INFO: Full form for HPV is High Pressure Valve in Space Science category
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INFO: Full form for HFE is High Frequency Executive in Space Science category
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INFO: Full form for HCM is Hardware Configuration Management in Space Science category
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INFO: Full form for HCM is Hard Copy Module in Space Science category
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INFO: Full form for HAS is Holddown Alignment Support in Space Science category
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INFO: Full form for HAS is Hydrogen Actuation System in Space Science category
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INFO: Full form for HAS is Hydraulic Actuation System in Space Science category
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INFO: Full form for SIW is Space Internet Workshop in Space Science category
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Smoke is a collection of airborne particulates and gases emitted when a material undergoes combustion or pyrolysis, together with the quantity of air that is entrained or otherwise mixed into the mass. It is commonly an unwanted by-product of fires (including stoves, candles, internal combustion engines, oil lamps, and fireplaces), but may also be used for pest control (fumigation), communication (smoke signals), defensive and offensive capabilities in the military (smoke screen), cooking, or smoking (tobacco, cannabis, etc.). It is used in rituals where incense, sage, or resin is burned to produce a smell for spiritual or magical purposes. It can also be a flavoring agent and preservative.

Smoke inhalation is the primary cause of death in victims of indoor fires. The smoke kills by a combination of thermal damage, poisoning and pulmonary irritation caused by carbon monoxide, hydrogen cyanide and other combustion products.

Smoke is an aerosol (or mist) of solid particles and liquid droplets that are close to the ideal range of sizes for Mie scattering of visible light.

INFO: Full form for GVT is Ground Vibration Test in Space Science category
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INFO: Full form for PGG is Project Galactic Guide in Space Science category
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INFO: Full form for DRB is Design Requirements Baseline in Space Science category
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INFO: Full form for DRB is Design Review Board in Space Science category
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INFO: Full form for PSG is Power Subsystem Group in Space Science category
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INFO: Full form for PRV is Pressure Reduction Valve in Space Science category
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In aviation, the runway visual range (RVR) is the distance over which a pilot of an aircraft on the centreline of the runway can see the runway surface markings delineating the runway or identifying its centre line. RVR is normally expressed in meters or feet. RVR is used to determine the landing and takeoff conditions for aircraft pilots, as well as the type of operational visual aids used at the airport.

INFO: Full form for EVE is Extraterrestrial Vulnerability Experiment in Space Science category
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INFO: Full form for FFD is Fixed Format Display in Space Science category
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INFO: Full form for ESE is Earth Satellite Environment in Space Science category
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INFO: Full form for ESE is Electrical Support Equipment in Space Science category
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INFO: Full form for ESE is Electronic Support Equipment in Space Science category
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