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1、ResearchonthemonitoringparameterschangeoftheILSGPnearfieldThepurposeandthesignificanceofthesubject:TheILSglidepathcanbeusedinthenormalcasesofthemonitoringandthemonitoringparametersnearfieldisoneoftheimportantparameterstojudgmentwhethertheILSGPisworkinnormal.Thereare
2、manyfactorstoinfluencethemonitoringparametersnearfiled, forexamplethechangeofthereflectionarea,thechangeofthesurroundingenvironmentsuchasthetemperatureandhumidity,andwhetherthepositionofthemonitoringantennanear-fieldareaccurate. Ifwecananalyzethesefactors,theILSGPca
3、nbejudgedeasilywhetheritisworkinnormal.Themainresearchcontents:Determinethepositionofthemonitoringantennanearfieldunderdifferentreflectionarea.Suchasthereflectionareahavedepression,slope,etc.Andanalyzetheotherpossiblecausesofthemonitoringparametersnearfield.Learntou
4、sethesimulationsoftwareLAGONWorkshops4.0.ItcandrawthecurvesaccordingtocomputethemonitoringparametersnearfieldtojudgewhethertheGPisinnormalwork.Introduceoneofthesystemsinthesoftwarebelow,thereferencesystems:•Select"NulRef"•GototheGPLayoutpanelandchoosetheKathreinante
5、nna•Backtothemainpanel,select"ElevationOrbit"andReferencepoint"Mast/horizontal"•ComputetheCSBfieldpatternsat10000m,1000m,315m•Copy/PastethecurvesinaWordPadfileandnotewhichcurveiscorrespondingtowhichdistanceGreen=10000m,red=1000m,black=315mWecanlearnfromthecurvesthat
6、whencomingclosertotheantennathefieldstrengthincreasesbecausethespaceattenuationdecreases.•SelectReferencepoint"Runway"•DeleteallcurvesandcomputeagaintheCSBfieldsat10000m,1000m,315m•Copy/PastethecurvesinaWordPadfileandnotewhichcurveiscorrespondingtowhichdistanceGreen
7、=370m,red=10000m,blue=1000mWiththereferenceatrunwaycentreline,whencomingclosertotheGPmasttheazimuthanglewithregardtotheGPantennaschanges.TheKathreinantennahasanullnearthethreshold.Sobecausethereceiverisapproachingthisnullthefieldstrengthdecreaseevenisthereceiveriscl
8、osertotheradiatingantennas.•Keepthereferencepointat"Runway"andcomputetheSBOfieldcurvesat10000m,1000m,315m.Green=315m,red=1000m,blue=10000m
