Chinese Space Science and Technology ›› 2012, Vol. 32 ›› Issue (6): 68-74.doi: 10.3780/j.issn.1000-758X.2012.06.010

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Multi-frequencySame-beamInterferometryonGeneralTT&CSignal

 CHEN  Lue1,2, TANG  Ge-Shi1, CHEN  Ming1,2, HAN  Song-Tao1, LIU  Hui-Cui,1, WANG  Mei1   

  1. (1ScienceandTechnologyonAerospaceFlightDynamicsLaboratory,BeijingAerospaceControlCenter,Beijing100194)
    (2ShanghaiAstronomicalObservatory,ChineseAcademyofSciences,Shanghai200030)
  • Received:2011-11-29 Revised:2012-04-19 Published:2012-12-25 Online:2012-12-25

Abstract: Themethodofmultifrequencysamebeaminterferometryutilizinggeneraltracking,telemetryandcontrol(TT&C)signalwasproposedtoimplementtwospacecraftrelativepositioning.Themathematicalcalculationofthedifferencephasedelaywasanalyzed,amodelmodificationmethodofdifferentialdelaymeasurementerrorwasproposed,andtheobservingconditioninlunarorbitofsamebeaminterferometryutilizinggroundmeasurementstationswasanalyzed.Utilizingthemulti-frequencyinformationofthegeneralTT&Csignalofthetwospacecraft,thesimulationresultsshowthatpicosecondleveldifferentialdelaymeasurementvalueisobtainedviadelayerrormodelmodification.Thisprovidesreliablemeasurementinformationforrelativepositionbetweentwospacecraftindeepspacemissions.

Key words: Samebeaminterferometry, Multi-frequency, Trackingtelemetryandcontrolsignal, Delay, Errormodelmodification, Deepspaceexploration, Spacecraft