Abstract: Toquantitativelyanalyzetheeffectsoftheionosphericscintillationonthereceivertrackingloop,thesignalamplitude,thephaseofcarrierandcode,thecarriernoiseratio,andthetrackingofI/Qchannelwereanalyzed,basedontheequivalentchannelmodelofthesignaltransferunderthescintillationconditions.Theresultsshowthatthecarriernoiseratiocandeclinerapidly,causedbytheionosphericscintillation,evenreducingby5dBintheseverecases.Thiswillhavesignificanteffectsonthepositioningaccuracy.Furthermore,anarrowerbandwidthoftrackingloopwillleadtotheweakercycleslipofcarrierunderthesameionosphericscintillation.

Key words: Ionosphericscintillation, Carriernoiseratio, Carrierphase, Decorrelation, Receiver, Navigation