ATI’s Glossary of Acoustic, Noise And Sonar Engineering Terms
Absorption: The removal of energy from a sonar beam as it propagates through the water. Absorption is one of the factors in limiting the range of a sonar system underwater. For lower side scan sonar frequencies, the chemical relaxation of magnesium sulphate in sea water is a major factor in absorption. The higher frequencies are...
Glossary of Electronic Warfare Terms
AC – Alternating CurrentAESA – Active Electronic Scanned ArrayAMRAMM – Advanced Medium Range Air-to-Air MissileAOJ – Acquire on JamAZ – AzimuthBSC – Binary Symmetric ChannelBW – Beam WidthBW - BandwidthCFAR – Constant False Alarm RateCG- Guided Missile CruiserCOMINT – Communications IntelligenceCPA – Closest Point of ApproachCW – Continuous WaveCWI – Continuous Wave IlluminationDC – Direct
ATI’s Glossary Of Unmanned Aircraft Vehicles Definitions And Terms
ATI has several courses on Unmanned Aircraft Systems (UAS) including Unmanned Aircraft System Fundamentals Unmanned Aircraft Systems Overview The following acronyms and definitions are useful for understanding Unmanned Aircraft Systems including UAS Definitions, Concepts & General UAS Principles. An unmanned aerial vehicle (UAV), commonly known as a drone, is an aircraft without a human pilot...
ATI’s Glossary of Digital Signal Processing Terms
A-lawAudio codec companding format. A logarithmic mapping between 8 bit data space and 13 bit sample space as described in the CCITT G.711 recommendation. A-law has 13 bits of dynamic range (78 dB). See u-law. ACAlternating Current. Power line transmission frequency is either 50 Hz or 60 Hz depending on global location. ADCAnalog to Digital...
ATI’s Glossary Of Radar, Missiles and Combat Systems Terms
ATI's Glossary Of Radar, Missiles and Combat Systems Terms Share | ACCEPTABLE DEGRADATION - The allowable reduction in system performance. For a fire control radar, the acceptable degradation is usually expressed as a reduction in range; for example, the maximum lock-on range might be degraded by 25 percent without loss of essential defense capability. ACQUISITION...
ATI’s Glossary of Space Flight Basics
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z a, A -- Acceleration. a = Δ velocity / Δ time. Acceleration = Force / Mass A -- Ampere, the SI base unit of electric current. Å...
ATI’s Glossary of Electronic Warfare Terms
AC – Alternating CurrentAESA – Active Electronic Scanned ArrayAMRAMM – Advanced Medium Range Air-to-Air MissileAOJ – Acquire on JamAZ – AzimuthBSC – Binary Symmetric ChannelBW – Beam WidthBW - BandwidthCFAR – Constant False Alarm RateCG- Guided Missile CruiserCOMINT – Communications IntelligenceCPA – Closest Point of ApproachCW – Continuous WaveCWI – Continuous Wave IlluminationDC – Direct
ATI’s Glossary of Systems Engineering Terms
Acquisition Phase. In the Acquisition Phase the system is developed from a single statement of need to a deliverable system with all supporting, or enabling, products. Baseline. A baseline is a complete description of the configuration of a system at a particular point in its development. Change Management. Change management is the process by which...
ATI’s Glossary of Unmanned Aircraft Systems and Unmanned Aireal Vehicles Terms
ADS-B Automatic Dependent Surveillance - Broadcast ATC Air Traffic Control AUVSI Association for Unmanned Vehicle Systems International BLOS Beyond Line of Sight CoA Certificate of Authorization CDL Common Data Link FAR Federal Aviation Regulations GDT Ground Data Terminal HALE High Altitude Long Endurance IFR Instrument Flight Rules ISR Intelligence, Surveillance and Reconnaissance LOS Line of...
ATI’s Glossary of Rocket and Aerospace Technology Terms
A ...AACS: Attitude & Articulation Control Subsystem.AAF: Association Astronautique Francaise.AAS: American Astronautical Society.ABL: Allegheny Ballistics Laboratory.Ablation: The erosion of a solid body by a high-temperature gas stream moving with high velocity, e.g. a reentry vehicle's heat shield which melts or chars under the effects of air friction.ABMA: Army Ballistic Missile Agency (USA).Abort: To cancel or...
ATI’s Glossary of Remote Sensing Terms
ATI's Glossary of Remote Sensing Terms A absolute temperature -Temperature measured on the Kelvin scale, whose base is absolute zero, i.e. -273¡C; 0¡C is expressed as 273K. absorptance -A measure of the ability of a material to absorb EM energy at a specific wavelength. absorption band -Wavelength interval within which electromagnetic radiation is absorbed by...