(0)G01S:2/4:

(0)G01S:2/4:

IPC6

SECTION G - PHYSICS

RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING...

G01S

3/5

G01S005/00 - G01S007/66

5

/

00

Position-fixing by co-ordinating two or more direction or position-line determinations; Position-fixing 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 path-difference measurements (G 01 S 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 path-difference measurements (G 01 S 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 G 01 S 7/10)

Determining absolute distances from a plurality of spaced points of known location

(covered by G 01 T 1/29)

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 path-difference measurements (G 01 S 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 path-difference measurements (G 01 S 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 G 01 S 7/62) [5]

Determining absolute distances from a plurality of spaced points of known location [5]

Details of systems according to groups G 01 S 13/00, G 01 S 15/00, G 01 S 17/00

of systems according to group G 01 S 13/00

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; Distance-elevation 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]

Coherent receivers [5]

Extracting wanted echo-signals (Doppler systems G 01 S 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 non-pulse 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 cross-section [6]

Diversity systems specially adapted for radar

of systems according to group G 01 S 17/00

Constructional features, e.g. arrangements of optical elements [6]

Details of pulse systems [6]

Transmitters [6]

Receivers [6]

Extracting wanted echo signals [6]

Gain of receiver varied automatically during pulse-recurrence period [6]

Details of non-pulse systems [6]

Extracting wanted echo signals [6]

Counter-measures or counter-counter-measures [6]

Means for monitoring or calibrating [6]

using polarisation effects (measuring polarisation of light G 01 J) [6]

(covered by G 01 S 7/48)

Display arrangements [6]

of systems according to group G 01 S 15/00

Constructional features (constructional features of transducers B 06 B; mounting transducers G 10 K 11/00) [6]

Details of pulse systems [6]

Transmitters [6]

Receivers [6]

Extracting wanted echo signals [6]

Gain of receiver varied automatically during pulse-recurrence period [6]

Means for transforming co-ordinates or for evaluating data, e.g. using computers [6]

Scan converters [6]

Data rate converters [6]

Details of non-pulse systems [6]

Extracting wanted echo signals [6]

Counter measures or counter-counter-measures, e.g. jamming, anti-jamming [6]

using analysis of echo signal for target characterisation; Target signature; Target cross-section [6]

with receivers spaced apart

Display arrangements

for providing variable ranges

for providing a permanent recording

Cathode-ray tube displays

Luminous indications (G 01 S 7/62 takes precedence) [5]

(transferred to G 01 S 7/527, G 01 S 7/536)

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