English: G 01 S 3/ 809 . . . Rotating or oscillating beam systems using continuous analysis of received signal for determining direction in the plane of rotation or oscillation or for determining deviation from a predetermined direction in such a plane [5] . . with means for adjusting phase or compensating for time-lag errors . . with indication presented on cathode-ray tubes . . with means for eliminating undesired waves, e.g. disturbing noises Position-fixing by co-ordinating two or more direction or position-line determinations; Positionfixing by co-ordinating two or more distance determinations [2] . using radio waves . . Position of source determined by a plurality of spaced direction-finders . . Position of source determined by co-ordinating a plurality of position lines defined by pathdifference measurements (5/12 takes precedence) [3] . . Position of single direction-finder fixed by determining direction of a plurality of spaced sources of known location . . Position of receiver fixed by co-ordinating a plurality of position lines defined by pathdifference measurements (5/12 takes precedence) [3] . . by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical, radial (radar indicators providing co-ordinated display of direction and distance 7/10) . . Determining absolute distances from a plurality of spaced points of known location . using electromagnetic waves other than radio waves . using ultrasonic, sonic, or infrasonic waves . . Position of source determined by a plurality of spaced direction-finders [5] . . Position of source determined by co-ordinating a plurality of position lines defined by pathdifference measurements (5/28 takes precedence) [5] . . Position of single direction-finder fixed by determining direction of a plurality of spaced sources of known location [5] . . Position of receiver fixed by co-ordinating a plurality of position lines defined by pathdifference measurements (5/28 takes precedence) [5] . . by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical, radial (sonar indicators providing co-ordinated display of direction and distance 7/62) [5] . . Determining absolute distances from a plurality of spaced points of known location [5] Details of systems according to groups 13/00, 15/00, 17/00 . of systems according to group 13/00 7/ 03 . . Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver (TR boxes H 01 J 17/64; waveguides or resonators or other devices of the waveguide type H 01 P; aerials H 01 Q; basic electronic circuitry, e.g. generation of oscillations, modulation, demodulation, amplification, pulse technique H 03; impedance networks, resonators H 03 H) [5] . . Display arrangements . . . Cathode-ray tube displays . . . . with vernier indication of distance, e.g. using two cathode-ray tubes . . . . Providing two-dimensional co-ordinated display of distance and direction . . . . . Plan-position indicators, i.e. P. P. I. . . . . . . Sector, off-centre, or expanded- angle display . . . . . Signals displayed as intensity modulation with rectangular co-ordinates representing distance and bearing, e.g. type B . . . . . Distance-height displays; Distanceelevation displays, e.g. type RHI, type E . . . . Stereoscopic displays; Three-dimensional displays; Pseudo-three-dimensional displays . . . . Producing cursor lines and indicia by electronic means . . . . the display being orientated or displaced in accordance with movement of object carrying the transmitting and receiving apparatus, e.g. true-motion radar . . . Displays using electroluminescent panels . . Details of pulse systems . . . Transmitters [5] . . . Receivers [5] . . . . Coherent receivers [5] . . . . Extracting wanted echo-signals (Doppler systems 13/50) [5] . . . . Means for transforming co-ordinates or for evaluating data, e.g. using computers [5] . . . . . Scan converters [5] . . . . Shaping echo pulse signals; Deriving nonpulse signals from echo pulse signals [5] . . . . Gain of receiver varied automatically during pulse-recurrence period, e.g. anti-clutter gain control [5] . . Details of non-pulse systems [5] . . Means for anti-jamming . . Jamming means, e.g. producing false echoes [2] . . Means for monitoring or calibrating . . using analysis of echo signal for target characterisation; Target signature; Target crosssection [6] . . Diversity systems specially adapted for radar . of systems according to group 17/00 . . Constructional features, e.g. arrangements of optical elements [6]
French: P.P.I. . . . . . . Représentation de gisement à secteur, décentrée ou à angle ouvert . . . . . Signaux représentés sous forme de modulation d’intensité lumineuse avec coordonnées rectangulaires représentant la distance et le gisement, p.ex. type B . . . . . Représentations de distance et de hauteur; Représentations de distance et d’élévation, p.ex. type RHI, type E . . . . Représentations stéréoscopiques; Représentations en trois dimensions; Pseudo-représentations en trois dimensions . . . . produisant des lignes et des indices de curseur par des moyens électroniques . . . . l’image étant orientée ou déplacée suivant le mouvement de l’objet portant l’appareillage émetteur et récepteur, p.ex. radar à mouvement vrai . . . Affichage par panneaux électriques luminescents . . Détails des systèmes à impulsions . . . Emetteurs [5] . . . Récepteurs [5] . . . . Récepteurs cohérents [5] . . . . avec extraction de signaux d’échos recherchés (systèmes Doppler 13/50) [5] . . . . Moyens pour transformer des coordonnées ou pour évaluer des données, p.ex. en utilisant des calculateurs [5] . . . . . Convertisseurs de balayage [5] . . . . mettant en forme des signaux échos pulsés; formant des signaux non pulsés à partir de signaux échos pulsés [5] . . . . Variation automatique du gain du récepteur durant la période de récurrence des impulsions, p.ex. antiparasitage automatique [5] . . Détails de systèmes non impulsionnels [5] . . Moyens d’antibrouillage . . Moyens de brouillage, p.ex. production de faux échos [2] . . Moyens de contrôle ou d’étalonnage . . utilisant l’analyse du signal d’écho pour la caractérisation de la cible; Signature de cible; Surface équivalente de cible [6] . . Systèmes à diversité spécialement adaptés au radar . de systèmes selon le groupe 17/00 . . Caractéristiques de structure, p.ex. agencements d’éléments optiques [6]