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TARGET VELOCITY [38 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2021-12-14

English

Subject field(s)
  • Weapon Systems
CONT

... fragmentation warheads are designed to cause target damage through the creation of high velocity fragments.

French

Domaine(s)
  • Systèmes d'armes

Spanish

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Record 2 2021-08-31

English

Subject field(s)
  • Weapon Systems
  • Energy (Physics)
CONT

To penetrate a target, KE projectiles rely on velocity and not an explosive charge.... Historical research indicates that KE projectiles are responsible for forty percent of tanks knocked out in battle. Because KE projectiles are normally fired at very high velocity, they have a very flat trajectory(flight path), a decreased time of flight, and increased hit probability. The effectiveness of KE projectiles decreases at longer ranges, since the projectiles slow down during long flights.

OBS

kinetic energy projectile; KE proj: designations officially approved by the Department of National Defence and the Canadian Forces.

French

Domaine(s)
  • Systèmes d'armes
  • Énergie (Physique)
OBS

projectile à énergie cinétique : désignation uniformisée par le Comité de terminologie française du Conseil de doctrine et de tactique de l'Armée de terre.

OBS

projectile à énergie cinétique; proj EC : désignations uniformisées par le ministère de la Défense nationale et les Forces canadiennes.

Spanish

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Record 3 2021-02-25

English

Subject field(s)
  • Guns (Land Forces)
  • Field Artillery
DEF

[A] munition fuze used with artillery munitions, typically projectiles fired by guns … howitzers and mortars.

CONT

Artillery fuzes are tailored to function in the special circumstances of artillery projectiles. The relevant factors are the projectile's initial rapid acceleration, high velocity and usually rapid rotation, which affect both safety and arming requirements and options, and the target may be moving or stationary. Artillery fuzes may be initiated by a timer mechanism, impact or detection of proximity to the target, or a combination of these.

French

Domaine(s)
  • Canons (Forces terrestres)
  • Artillerie de campagne
CONT

Une fusée d'artillerie est un dispositif destiné à déclencher la déflagration de la charge intérieure des projectiles, à un instant précis du vol ou de l'impact.

Spanish

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Record 4 2020-12-07

English

Subject field(s)
  • Target Acquisition
  • Bombs and Grenades
  • Operations (Air Forces)
CONT

The bomb fall line is an azimuth reference between the pipper and the velocity vector that indicates wind and speed effects on the weapon. When the target and CCIP [continuously computed impact point] pipper are coincident, you will command bomb release.

French

Domaine(s)
  • Acquisition d'objectif
  • Bombes et grenades
  • Opérations (Forces aériennes)

Spanish

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Record 5 2019-11-18

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
DEF

An operating mode of antiaircraft, aviation, and other systems in which, without the participation of a human operator but only under his supervision, changes are made in the axial orientation or the direction of motion for certain elements in the system as a result of changes in trajectory and velocity of a target.

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
CONT

Ce système permet au navigateur de définir et de choisir un certain nombre de zones d'inclusion et d'exclusion dans lesquelles l'ordinateur effectue la poursuite automatique de cibles désignées sur la carte vectorielle tout en définissant les limites du chenal, de façon à atténuer la charge de travail de l'opérateur.

Spanish

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Record 6 2012-06-21

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie

Spanish

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Record 7 2011-11-25

English

Subject field(s)
  • Weapon Systems (Land Forces)
  • Target Acquisition
CONT

... the gun barrels are fitted with muzzle velocity sensors, which are linked to the fire control computer, so the actual speed of the round can be taken into account when the computer calculates the lead angle necessary to hit a moving target. This is necessary as the speed of the round when leaving the barrel may vary depending on the ammunition manufacture date and age, moisture content, the barrel wear, etc.

CONT

Projectile muzzle velocity sensor mounted on T-84 MBT [main battle tank] turret roof. As an option, the tank fire-control system can also include a projectile muzzle velocity sensor, which measures the velocity in question and feeds information to the tank’s fire control ballistic computer after each firing of the gun to allow to automatically correct for gun bore wear, charge temperature and other factors.

French

Domaine(s)
  • Systèmes d'armes (Forces terrestres)
  • Acquisition d'objectif

Spanish

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Record 8 2011-11-25

English

Subject field(s)
  • Small Arms
  • Target Acquisition
CONT

While the SFCS has a number of features and capabilities designed to vastly improve target identification and hand-off among a number of operators, its core is a muzzle velocity sensor. The system sits on the Picatinny rail of any weapon and draws on a number of acoustic sensors to characterize how the weapon is performing between the time the primer of a round is struck and the bullet leaves the barrel.... Meteorological and other sensor inputs are fed into a ballistics computation that then gives a range azimuth correction to the operator. It helps the operator correct his aim point so that his probability of hit for second, third and fourth rounds is that much more accurate.

French

Domaine(s)
  • Armes légères
  • Acquisition d'objectif

Spanish

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Record 9 2011-05-31

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
  • Lasers and Masers
  • Remote Sensing
DEF

An instrument combining a pulsed laser transmitter and optical receiver (usually a telescope) with an electronic signal processing unit used for the detection and ranging of various distant targets in the atmosphere, analogous to the principles of operation of microwave radar.

CONT

The lidar technique operates on the same principle as radar; in fact, it is sometimes called laser radar. The principal difference between lidar and radar is the wavelength of the radiation used. Radar uses wavelengths in the radio band whereas lidar uses light, that is usually generated by lasers in modern lidar systems.

CONT

There are three basic generic types of lidar : range finders, DIAL, and Doppler lidars. Rande finder lidars are the simplest lidars. They are used to measure the distance from the lidar instrument to a solid or hard target Differential Absorption Lidar(DIAL) is used to measure chemical concentrations(such as ozone, water vapor, pollutants) in the atmosphere. Doppler lidar is used to measure the velocity of a target High-resolution DEMs with vertical accuracy as good as 10 cm can be created with Lidar. Lidar is also better able to map bare earth elevations in forested or vegetated areas than other methods because only a single laser pulse needs to be able to reach between trees and the ground.

OBS

lidar: Coined word for light detection and ranging.

Key term(s)
  • laser-radar

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
  • Masers et lasers
  • Télédétection
DEF

Combinaison d'un laser et d'un récepteur accolés, destinée à étudier les échos produits par les particules de l'atmosphère sur des ondes visibles ou infrarouges.

OBS

La détection se fait par des cellules optiques suivies de photomultiplicateurs.

OBS

Le lidar sert également à la localisation et à la poursuite télémétrique d'engins dans le ciel.

OBS

lidar : acronyme dérivé du terme anglais «light detection and ranging» qui veut dire «détection et télémétrie par ondes lumineuses».

Key term(s)
  • radar laser
  • laser-radar
  • laser radar

Spanish

Campo(s) temático(s)
  • Guía radárica, radioguía y radiogoniometría
  • Láser y máser
  • Teledetección
DEF

Aparato de detección y localización por ondas luminosas.

Save record 9

Record 10 2011-05-27

English

Subject field(s)
  • Telecommunications
  • Vacuum Tubes (Electronics)
DEF

The scanning of a target with electrons of such velocity that the secondary emission factor is appreciably less than unity.

Key term(s)
  • low velocity scanning

French

Domaine(s)
  • Télécommunications
  • Tubes et lampes (Électronique)
DEF

Exploration d'une cible par des électrons de vitesse telle que le facteur d'émission secondaire soit sensiblement inférieur à l'unité.

Spanish

Campo(s) temático(s)
  • Telecomunicaciones
  • Tubos de vacío (Electrónica)
Save record 10

Record 11 2010-11-10

English

Subject field(s)
  • Weapon Systems
DEF

A sighting system in which the correct release point is determined when the angular velocity of the target relative to the bomb aimer reaches a precomputed value.

OBS

angular velocity sight: term and definition standardized by NATO.

French

Domaine(s)
  • Systèmes d'armes
DEF

Viseur qui permet la détermination du point de largage correct par coïncidence entre le défilement angulaire mesuré de l'objectif par rapport au bombardier et une valeur prédéterminée et préaffichée.

OBS

viseur à défilement angulaire : terme et définition normalisés par l'OTAN.

Spanish

Campo(s) temático(s)
  • Sistemas de armas
Save record 11

Record 12 2007-03-28

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
  • Surveillance, Detection and Reconnaissance (Military)
CONT

MDV determines whether the majority of military traffic, which often moves very slowly, will be visible. To capture the majority of this traffic, a radar must have the ability to detect the lowest possible radial velocity. As a target's radial velocity approaches zero, the target will fall into the clutter or "blind zone. "The clutter spread is a function of a radar's antenna real bandwidth. When a target is in clutter, traditional MTI [moving target indicator] radars can either detect the target or locate it, but not both.

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
  • Surveillance, détection et reconnaissance (Militaire)

Spanish

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Record 13 2006-10-05

English

Subject field(s)
  • Target Acquisition
CONT

The radar [of the Navy Global Hawk drone] features... a moving target acquisition mode that refines the position and velocity of vessels detected by the radar.

French

Domaine(s)
  • Acquisition d'objectif

Spanish

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Record 14 2006-06-01

English

Subject field(s)
  • Remote Sensing
DEF

A type of radar that extracts additional information about a target through measurement of the phase of echoes from a sequence of pulses (or an extended observation interval, as in an FM-CW radar).

OBS

The phase information may be used to improve the signal-to-noise ratio,... to estimate the velocity of the target through the Doppler effect... or to resolve the location of the target in a synthetic aperture radar.

OBS

coherent radar: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).

French

Domaine(s)
  • Télédétection
DEF

Radar qui permet d'obtenir des informations sur la cible en mesurant la relation de phase entre les signaux transmis et les signaux reçus.

OBS

radar cohérent : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

Spanish

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Record 15 2006-03-22

English

Subject field(s)
  • Remote Sensing
CONT

Doppler lidar is used to measure the velocity of a target. When the light transmitted from the lidar hits a target moving towards or away from the lidar, the wavelength of the light reflected/scattered off the target will be changed slightly. This is known as a Doppler shift-hence Doppler Lidar. If the target is moving away from the lidar, the return light will have a longer wavelength(sometimes referred to as a red shift), if moving towards the lidar the return light will be at a shorter wavelength(blue shifted). The target can be either a hard target or an atmospheric target-the atmosphere contains many microscopic dust and aerosol particles which are carried by the wind.

French

Domaine(s)
  • Télédétection
DEF

Lidar atmosphérique qui mesure l'effet Doppler sur le faisceau rétrodiffusé par des particules (diffusion de Mie) ou des molécules (diffusion de Rayleigh) du milieu, et permet de déduire la vitesse relative (celle du vent en attitude, par exemple).

Spanish

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Record 16 2006-03-21

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
  • Remote Sensing
  • Spacecraft
DEF

That portion of the pulsed beam energy which is reflected back to the receiver after the beam encounters an obstruction in the atmosphere.

CONT

The characteristics of a radar echo are determined by 1) the waveform, frequency, and power of the incident wave; 2) the range and velocity of the target with respect to the radar; and 3) the size, shape, and composition of the target.

CONT

Each return signal (echo) is recorded in amplitude and phase for a slight displacement of the antenna in the flight direction. The effect of a considerable larger antenna is obtained synthetically by storing and combined processing of these multiple echoes. The SAR method operates only when the radar radiation is coherent.

OBS

cell: Such usage, although common, is technically incorrect.

OBS

radar echo: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
  • Télédétection
  • Engins spatiaux
DEF

Portion de l'énergie pulsée du faisceau qui est réfléchie et renvoyée au récepteur lorsque le faisceau rencontre un obstacle dans l'atmosphère.

CONT

Le radar météorologique sert en premier lieu à la détection des zones de précipitations ayant cours dans la situation météo du moment. Après traitement par des ordinateurs spécifiques, les échos radar sont affichés sur un écran où divers repères géographiques tels que frontières, rivières et lacs permettent de localiser les zones de précipitations. L'intensité des échos radar fournit une mesure quantitative des précipitations, exprimée en millimètres par heure (mm/h), présentée au moyen de zones coloriées. En effet, plus l'écho renvoyé par le faisceau radar est important plus l'obstacle qui le renvoie est dense, et plus la pluie ou la neige est abondante.

OBS

écho radar: terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

Key term(s)
  • écho de radar

Spanish

Campo(s) temático(s)
  • Guía radárica, radioguía y radiogoniometría
  • Teledetección
  • Naves espaciales
DEF

Aquella porción del impulso de energía direccional (emitido por un radar) que es reflejada hacia el receptor al encontrar el haz algún obstáculo.

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Record 17 2005-10-06

English

Subject field(s)
  • Scientific Instruments
  • Physics
CONT

Together with the large aperture magnet Goliath two tracking arms allow the spectrometry of charged particles. In addition two time-of-flight walls measure the velocity to provide the mass of each particle. Goliath is centred 3. 28m downstream of the target with a gap size of 1. 60m. It is a 1. 6 Tm dipole magnet bending the positively charged particles to the second tracking arm side, which is defined as the positive x-axis.

CONT

The magnet Goliath, which has been modified for the WA93 experiment by increasing the gap size from 1200mm to 1600mm and by special exit pillars to optimize the acceptance of the spectrometer, will be used without further modifications.

Key term(s)
  • Goliath magnet

French

Domaine(s)
  • Instruments scientifiques
  • Physique
CONT

Les utilisateurs de NA57 nous ont signalés que les variations rapides de courant dans l'aimant GOLIATH pouvaient être dangereuses pour leurs détecteurs.

Spanish

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Record 18 2005-04-25

English

Subject field(s)
  • Transport of Goods
  • Air Traffic Control
  • Launching and Space Maneuvering
DEF

The frequency shift observed at a receiver due to any relative motion between transmitter and receiver.

CONT

The Doppler frequency depends on the component of satellite velocity in the line-of-sight direction to the target. This direction changes with each satellite position along the flight path, so the Doppler frequency varies with azimuth time. For this reason, azimuth frequency is often referred to as Doppler frequency.

OBS

Doppler shift; Doppler frequency-shift: terms and definition officially approved by the International Civil Aviation Organization (ICAO).

OBS

Doppler shift: term officially approved by the RADARSAT-2 Terminology Approval Group (RTAG).

Key term(s)
  • Doppler shift effect

French

Domaine(s)
  • Transport de marchandises
  • Circulation et trafic aériens
  • Lancement et manœuvres dans l'espace
DEF

Décalage de fréquence observé dans le récepteur, attribuable à tout déplacement de l'émetteur et du récepteur l'un par rapport à l'autre.

OBS

déplacement Doppler-Fizeau : terme normalisé par l'AFNOR et reproduit avec son autorisation.

OBS

décalage Doppler; décalage de fréquence par effet Doppler : termes et définition uniformisés par l'Organisation de l'aviation civile internationale (OACI).

OBS

décalage Doppler : terme uniformisé par le Groupe de travail de la terminologie de RADARSAT-2 (GTTR).

Key term(s)
  • écart de fréquence dû à l'effet Doppler

Spanish

Campo(s) temático(s)
  • Transporte de mercancías
  • Control de tránsito aéreo
  • Lanzamiento y maniobras en el espacio
DEF

Desviación de frecuencia observada en un receptor debido al movimiento relativo de transmisor y receptor.

OBS

de desplazamiento de frecuencia.

OBS

desviación Doppler : término y definición aceptados oficialmente por la Organización de Aviación Civil Internacional (OACI).

Key term(s)
  • desviación de frecuencia debida al efecto Doppler
Save record 18

Record 19 2002-12-16

English

Subject field(s)
  • CBRNE Weapons
CONT

Direct fire projectiles are primarily designed to strike a target with a velocity high enough to achieve penetration. The chemical energy projectile uses some form of chemical heat and blast to achieve penetration. It detonates either at impact or when maximum penetration is achieved. Chemical energy projectiles carrying impact-detonated or delayed detonation high-explosive charges are used mainly for direct fire from systems with high accuracy and consistently good target acquisition ability. Tanks, antitank weapons, and automatic cannons usually use these types of projectiles.

French

Domaine(s)
  • Armes CBRNE
OBS

projectile à énergie chimique : terme uniformisé par le Comité de terminologie française du Conseil de doctrine et de tactique de l'Armée de terre.

Spanish

Save record 19

Record 20 2002-11-22

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
DEF

The radial velocity of a target with respect to the radar for which the response is approximately zero.

OBS

blind speed: term and definition standardized by the Institute of Electrical and Electronics Engineers.

OBS

In a coherent moving target indicator system using a uniform repetition rate, the blind speed is the radial velocity at which the moving target changes distance by one-half wavelength(or multiples thereof) during each pulse period.

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
DEF

Vitesse radiale d'un objectif pour laquelle il échappe à la détection d'un radiodétecteur à élimination d'échos fixes.

Spanish

Save record 20

Record 21 2002-02-12

English

Subject field(s)
  • Weapon Systems
  • Operations (Air Forces)
OBS

1. vector sights-Sighting systems using the vector principle and incorporating a mechanical representation of the vectors of the bombing triangle. a. pre-set vector-A sighting system in which the values for height, airspeed and wind are set manually on the bomb sight. b. continuously set vector-A sighting system in which the values for height, airspeed and drift are automatically and continuously updated. 2. tachometric or synchronous sights-Sighting systems which automatically release the bomb at the correct bombing angle by maintaining the sight line on the target, thus determining the speed relative to the target and in some cases the track through the target. 3. angular velocity sight-A sighting system in which the correct release point is determined when the angular velocity of the target relative to the bomb aimer reaches a precomputed value.

OBS

bomb sighting system: term and observation standardized by NATO.

French

Domaine(s)
  • Systèmes d'armes
  • Opérations (Forces aériennes)
OBS

1. viseur vectoriel - Viseur basé sur une représentation vectorielle des grandeurs utilisées. Il comporte un mécanisme qui reproduit mécaniquement le triangle de visée. On distingue : a. le viseur à préaffichage - Les valeurs de la hauteur de bombardement, de la vitesse par rapport à l'air et du vent sont affichées à la main une fois pour toutes. b. le viseur à affichage continu - La hauteur, la vitesse par rapport à l'air et le vent sont constamment réajustées automatiquement. 2. viseur tachymétrique ou synchronisé - Viseur qui largue la bombe au moment où l'angle de bombardement correct est atteint. Ce type de viseur maintient la ligne de visée sur la cible, déterminant ainsi la vitesse exacte par rapport à l'objectif. Il peut aussi maintenir la route suivie par l'avion de façon à la faire passer par la cible. 3. viseur à déplacement angulaire - Viseur qui permet la détermination du point de largage correct par coïncidence entre le défilement angulaire mesuré de l'objectif par rapport au bombardier et une valeur prédéterminée et préaffichée.

OBS

viseur de bombardement : terme et observation normalisés par l'OTAN.

Spanish

Campo(s) temático(s)
  • Sistemas de armas
  • Operaciones (Fuerzas aéreas)
OBS

1. visores vectoriales - Visores que se basan en una representación vectorial de las magnitudes que emplea. Tiene un dispositivo que reproduce mecánicamente el triángulo de puntería. Se distinguen: a. de vectores preestablecidos - Sistema en el que los valores de la altura, velocidad respecto al aire y del viento se introducen normalmente en el sistema una sola vez. b. de establecimiento continuo - Sistema en el que los valores de la altura, velocidad respecto al aire y del viento se reajustan automáticamente de forma continua. 2. visores tacométricos o sincronizados - Visores que sueltan la bomba de forma automática en el momento correspondiente al ángulo de bombardeo correcto. Este tipo de visores mantienen la línea de puntería sobre el blanco determinando así la velocidad relativa del objetivo y en algunos casos la ruta para el seguimiento. 3. visores de velocidad angular - Sistema de visores en los que el punto de lanzamiento se determina mediante la velocidad angular del objetivo con respecto al avión de bombardeo. (Cuando alcanza un valor previamente calculado).

Save record 21

Record 22 2001-03-28

English

Subject field(s)
  • Missiles and Rockets
  • Air Forces
CONT

The aircrew has the ability to make the engagement more difficult for the threat. A stationary target allows the threat to adjust each shot from the previous shot, until it hits the aircraft. A moving, constant velocity target provides a more difficult engagement procedure.

French

Domaine(s)
  • Missiles et roquettes
  • Forces aériennes

Spanish

Save record 22

Record 23 2000-04-04

English

Subject field(s)
  • Air Traffic Control
  • Radar, Radio Guidance and Goniometry
DEF

The radial velocity of a moving target such that the target is not seen on primary radars fitted with certain forms of fixed echo suppression.

French

Domaine(s)
  • Circulation et trafic aériens
  • Radar, radioguidage et radiogoniométrie
DEF

Vitesse radiale d'une cible en mouvement telle que la cible n'apparaît pas sur les radars primaires équipés de certaines formes d'élimination des échos fixes.

Spanish

Campo(s) temático(s)
  • Control de tránsito aéreo
  • Guía radárica, radioguía y radiogoniometría
DEF

Velocidad radial de un objetivo en movimiento, tal que el objetivo no aparece en los radares primarios dotados de ciertas formas de eliminación de ecos fijos.

Save record 23

Record 24 1998-05-28

English

Subject field(s)
  • Hydrology and Hydrography
CONT

Hydrological Data Collection. In order to model the hydrology of a stream study segment over a range of flow rates, it is necessary to collect specific data defining the hydraulic boundary conditions. Boundary conditions define the target hydraulic simulation output, i. e. the desired flow rate, velocity and water surface elevation at the up-stream and down-stream ends of the segment. Hydraulic boundary are typically defined by flow rate, velocity magnitude and direction and/or water surface elevation. Boundary conditions, for instream flow analysis, are usually defined at the up-stream or down-stream boundaries of the study segment. In addition to the boundary conditions it is important to collect both quantitative and qualitative hydraulic information within the boundaries of the study segment. This additional data is used for model calibration and verification.

French

Domaine(s)
  • Hydrologie et hydrographie

Spanish

Save record 24

Record 25 1995-09-12

English

Subject field(s)
  • Aeroindustry
  • Radar, Radio Guidance and Goniometry
CONT

... the APG-65 [radar] has a wide variety of air-to-ground and surface search modes. These include ground mapping and ranging, moving target indication and tracking, terrain avoidance... and precision velocity update.

French

Domaine(s)
  • Constructions aéronautiques
  • Radar, radioguidage et radiogoniométrie
CONT

[L'APG-65 possède] une série de modes air-sol et air-surface : cartographie avec mesure de distance, poursuite avec élimination d'échos fixes, repérage d'objectifs immobiles, évitement d'obstacles [...] et enfin mesure précise et continue de la vitesse.

Spanish

Save record 25

Record 26 1991-03-12

English

Subject field(s)
  • Small Arms
DEF

Centre-fire cartridge which is loaded to produce substantially less than full-charge-load velocity. It is used principally in target shooting.

OBS

Term and definition officialized by the Small Arms Terminology Working Group.

French

Domaine(s)
  • Armes légères
DEF

Cartouche à percussion centrale qui est chargée pour produire une vitesse sensiblement inférieure à celle d'une cartouche de charge normale. Elle sert principalement au tir à la cible.

OBS

Terme et définition uniformisés par le Groupe de travail de terminologie des armes légères.

Spanish

Save record 26

Record 27 1990-01-23

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
DEF

The frequencies generated by a target moving at a given velocity.

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie

Spanish

Save record 27

Record 28 1989-12-12

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
DEF

A technique that improves the estimates of target position and velocity relative to those that can be provided in the search mode.

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie

Spanish

Save record 28

Record 29 1989-11-02

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie

Spanish

Save record 29

Record 30 1989-07-10

English

Subject field(s)
  • Physics
  • Radar, Radio Guidance and Goniometry
DEF

A function which describes the complex envelope of the signal at the output for the radar receiver as a function of radar target range and radial velocity.

French

Domaine(s)
  • Physique
  • Radar, radioguidage et radiogoniométrie

Spanish

Save record 30

Record 31 1985-06-20

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
OBS

radar DNOA JMB 9.72

Spanish

Save record 31

Record 32 1984-02-06

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
DEF

a moving target indicator(MTI) in which a radar reference frequency oscillator is used in the receiver for phase comparison with the return signals for determining the radial component of the velocity of an object.

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie

Spanish

Save record 32

Record 33 1982-01-07

English

Subject field(s)
  • Aeroindustry
CONT

(...), the MTD [Moving Target Detection] principle involves dividing up the entire radar coverage area into small range-azimuth cells-(...) called ’coherent processing intervals’(CPI). Eight pulses generated at a constant repetition frequency are assigned to each cell, and each return is subjected to Doppler filtering over a range of velocity values. The particular feature of MTD is its ability to measure the density of clutter and to detect the sudden presence of an additional element-such as an aircraft moving into a particular cell-even though it may have zero relative velocity on account of its tangential track.

French

Domaine(s)
  • Constructions aéronautiques
CONT

Le principe du MTD [Moving Target Detection] est de diviser la zone couverte par le radar en secteurs définis en distance et en azimut (...) et appelés «intervalles de traitement cohérent» (ITC). A chaque secteur sont affectées huit impulsions émises selon une fréquence de répétition constante et chaque écho est soumis à un filtrage Doppler couvrant toute une gamme de vitesses. La caractéristique essentielle du MTD est son aptitude à mesurer la densité des échos parasites et à y détecter la présence soudaine de tout élément nouveau - tel qu'un aéronef entrant dans un secteur donné - même si sa vitesse relative est nulle du fait que sa trajectoire est tangentielle.

Spanish

Save record 33

Record 34 1981-11-17

English

Subject field(s)
  • Aeroindustry
CONT

New air-to-air modes include cued search, spotlight search, medium PRF single target track, non-coherent pulse track, pulse Doppler illumination, track retention through the tangential velocity notch and ground moving target rejection.

French

Domaine(s)
  • Constructions aéronautiques
CONT

(...) de nouveaux modes sont prévus dans les fonctions air-sol (élimination des échos fixes, évitement d'obstacles) et air-air (recherche sur indices, recherche dirigée, poursuite d'objectif unique à fréquence d'impulsions moyenne, etc.).

Spanish

Save record 34

Record 35 1981-11-17

English

Subject field(s)
  • Aeroindustry
CONT

New air-to-air modes include cued search, spotlight search, medium PRF single target track, non-coherent pulse track, pulse Doppler illumination, track retention through the tangential velocity notch and ground moving target rejection.

French

Domaine(s)
  • Constructions aéronautiques
CONT

(...) de nouveaux modes sont prévus dans les fonctions air-sol (élimination des échos fixes, évitement d'obstacles) et air-air (recherche sur indices, recherche dirigée, poursuite d'objectif unique à fréquence d'impulsions moyenne, etc.).

Spanish

Save record 35

Record 36 1981-11-16

English

Subject field(s)
  • Aeroindustry
CONT

The radar is a Doppler MTI [moving target indicator] system with what is described as a "pretty low velocity gate" to enable slow-moving vehicles to be detected.

Key term(s)
  • velocity threshold

French

Domaine(s)
  • Constructions aéronautiques
CONT

Le radar Doppler à éliminateur d'échos fixes aurait un "seuil de détection de vitesse très bas", de façon à pouvoir détecter des véhicules se déplaçant très lentement.

Spanish

Save record 36

Record 37 1981-03-24

English

Subject field(s)
  • Aeroindustry
CONT

(...) the APG-65 [radar] has a wide variety of air-to-ground and surface search modes. These include ground mapping and ranging, moving target indication and tracking(...), sea surface search and precision velocity update(...)

French

Domaine(s)
  • Constructions aéronautiques
CONT

[L'APG-65 possède] une série de modes air-sol et air-surface: cartographie avec mesure de distance, poursuite avec élimination d'échos fixes, (...) recherche surface, et enfin mesure précise et continue de la vitesse.

Spanish

Save record 37

Record 38 1978-04-11

English

Subject field(s)
  • Radar, Radio Guidance and Goniometry
  • Radio Transmission and Reception
OBS

Circuits are provided to allow the system prf rate to be staggered since simple mti systems have an inherent deficiency that results in zero response when a target is moving with the radial component of tis velocity at mti blind speeds.(...). The ASR 5 may be operated with or without prf staggering.

French

Domaine(s)
  • Radar, radioguidage et radiogoniométrie
  • Émission et réception radio
OBS

Pour lutter contre [les vitesses aveugles], il y a deux moyens: - faire varier [la fréquence de récurrence] (wobbulation de la fréquence de récurrence), - émettre sur plusieurs longueurs d'ondes et choisir le meilleur échos et sommer les échos de sortie de la VCM (radar diversité); (...)

OBS

On peut cependant remédier assez facilement à cette situation [vitesse aveugle] en faisant varier F de quelques pour-cent à chaque récurrence, c'est-à-dire en wobbulant la fréquence de répétition du radar.

Spanish

Save record 38

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