14 - NN200-14 Radar Navigation VNG

14 - NN200-14 Radar Navigation VNG - NN-200Navigation Into...

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Unformatted text preview: NN-200Navigation RadarSEANAVNavigating Into The FutureRAdio Detection And Ranging ENABLING OBJECTIVESUnderstand and describe:Components and characteristicsKey factors of radars rangeNavigation use of radarAdvantages and limitationsShipboard organization of the radar navigation teamReferences:Duttons (pg. 138-139)Pub 1310 Radar Navigation and Maneuvering Board ManualINTRODUCTIONRADAR: RAdio Detection And RangingRadar operates by transmitting andreceiving a radio wave. The wavepropagates through the air and reflects offobjects. This reflection (echo) is received,amplified and processed by the radar intoan image. This information is then displayedon a screen for a userNavigation radars usually have a highfrequency and low pulselength whichcauses them to have higher resolution, butshorter range.RECEIVERDUPLEXERSCOPE TRAITEMENTPRINCIPE DU RADAR A IMPULSIONSTRANSMITERRanges are calculated measuringthe time difference between theradar sending out the signal andreceiving back the echoDirection are calculated consideringthe direction the antenna is pointedCOMPONENTSTransmitter: produces electromagnetic waves of energyAntenna: transmit outgoing pulses/receive returning echoesReceiver: amplifies the very weak returning echoes and demodulates them for displayDisplay: Display information and provide access to functionsAntennaDuplexerTransmitterReceiverDisplayDuplexer: isolates the receiver from thetransmitter while permitting them to share acommon antennaUSES OF NAVIGATION RADARNavigation: to provide bearing and range information to navigation aids...
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This note was uploaded on 11/04/2010 for the course NAVIGATION NN200 taught by Professor Vuong during the Spring '10 term at Naval Academy.

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14 - NN200-14 Radar Navigation VNG - NN-200Navigation Into...

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