一种二次雷达的目标更新周期的计算方法-豆柴文库

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一种二次雷达的目标更新周期的计算方法
Introduction
Radarsareusedtodetect,locateandtrackmovingobjectssuchasplanes,drones,missiles,andships.Therange,velocity,anddirectionofthemovingtargetaremeasuredbytheradarandusedtotrackandidentifythetarget.Thisinformationcanbeusedforsurveillance,navigation,andmilitaryapplications.Theaccuracyandreliabilityoftheradarareimportantforitseffectiveuse.Onefactorthataffectstheaccuracyoftheradaristhetargetupdateinterval.Thetargetupdateintervalisthetimeperiodbetweenconsecutivemeasurementsofthetarget'sposition.Theshortertheupdateinterval,themoreaccuratethetrackinginformation.
Thetargetupdateintervalisdependentonseveralfactorssuchastheradarsystemcharacteristics,thetarget'svelocity,andthedesiredlevelofaccuracy.Inthispaper,wewilldiscussonemethodforcalculatingthetargetupdateintervalforasecond-orderradarsystem.
Second-OrderRadarSystem
Asecond-orderradarsystemisaradarsystemthatiscapableofmeasuringtherange,velocity,andaccelerationofatarget.Therangeisthedistancefromtheradartothetarget,thevelocityisthespeedatwhichthetargetismovingtowardsorawayfromtheradar,andtheaccelerationistherateofchangeofvelocity.Asecond-orderradarsystemcanmeasuretherangeandvelocityofatargetusingaDopplershiftmeasurementandcanmeasuretheaccelerationusingachangeintheDopplershiftovertime.
TargetUpdateIntervalCalculation
Thetargetupdateintervalisthetimebetweentwoconsecutivemeasurementsofthetarget'sposition.Theupdateintervalcanbecalculatedasfollows:
T=2*R/c+δt
WhereTisthetargetupdateinterval,Ristherangeofthetarget,cisthespeedoflight,andδtisthemeasurementtime.
Forasecond-orderradarsystem,therangeandvelocityofthetargetaremeasuredusingaDopplershiftmeasurement.TheDopplershiftmeasurementisthedifferencebetweenthetransmittedfrequencyandthereceivedfrequency.TheDopplershiftisproportionaltothevelocityofthetargetandcanbeusedtocalculatethevelocityofthetarget.
TheaccelerationofthetargetcanbemeasuredbytakingthedifferencebetweentwoconsecutiveDopplershiftmeasurements.ThechangeinDopplershiftovertimeisproportionaltotheaccel