Chinese Space Science and Technology ›› 2014, Vol. 34 ›› Issue (3): 67-72.doi: 10.3780/j.issn.1000-758X.2014.03.010

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ErrorModelingandEvaluationofUSBRangeandRange-rateMeasurements

ZHENGAiwu 1,2,SUNJing1,2,HUSongjie1,2,ZHOUJianping3   

  1. (1ScienceandTechnologyonAerospaceFlightDynamicsLaboratory,Beijing100094)(2BeijingAerospaceControlCenter,Beijing100094)(3ChinaMannedSpaceEngineeringOffice,Beijing100720)
  • Received:2013-04-10 Revised:2013-12-23 Published:2014-06-25 Online:2014-06-25

Abstract: TheUnifiedS-bandSystem(USB)isthemainTT&C(Telemetry,TrackingandCommand)networkusedinspacemissionsincludingmannedspacecraftandlunarexplorationprogramsofChina.Firstly,allkindsoferrorsexistedintheUSBrangeandrange-rate  measurementswereanalyzed,andtheerrorcorrectionmodelsoftroposphericrefractiondelay,ionosphericdelay,timetagbias,phasecentererror,channeldelayandsatelliteephemeriserrorwerepresented.Secondly,theaccuracyoftheUSBmeasurementswasevaluatedandobtainedbasedontheresidualanalysisoftheUSBrangeandrange-ratemeasurementsofarealspacemission.Finally,accordingtothecurrentactualityofdisposalandapplicationofUSBmeasurements,someadvicesthatshouldbenotedindataprocessingwereputforward.TheconclusionshaveimportantreferencevaluetoimprovetheaccuracyoforbitdeterminationbasedontheUSBsystemofChina.

Key words: UnifiedS-bandsystem, Range, Range-rate, Residualanalysis, Precisionevaluation, Spacecraft