›› 2017, Vol. 37 ›› Issue (1): 104-110.doi: 10.16708/j.cnki.1000-758X.2017.0019

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Researchontriplefrequencycarrier-phaseobservationlinearcombinationofBeiDousatellitenavigationsystem

 YAN  Huai-Cheng, HAN  Bao-Min*, ZHANG  Jia-Xin   

  1. SchoolofArchitectureandEngineering,ShandongUniversityofTechnology,Zibo255049,China
  • Received:2016-06-28 Revised:2016-12-08 Online:2017-02-25 Published:2017-01-24

Abstract: ThemathematicalmodelofBeiDoutriple-frequencycarrier-phaselinearcombinationwasgivenbasedonBeiDousatellitenavigationsystemtriple-frequencydata,andthewavelength,ionosphericerrorandtheobservationnoiseoflinearcombinationwereanalyzedsystemmatically.Intermsofambiguityintegerpropertiesandusedtheintegerlineartransformationmethodasabasis,theoptimizationofthecombinationcoefficientwasrealizedbyMatlab.Byapplyingdifferentcombinationcoefficientstothecycle-slipdetectionbasedoncode-phase,itshowsthatthecombinedcycleslipdetectionwiththesumofthecombinationcoefficientsbeingnot0,ismorethan05weeks,andthelargerthesumofthecombinationcoefficientsis,thegreaterthefluctuationis.ByapplyingdifferentcombinationcoefficientstotheambiguityresolutionbasedonGF-CIRfortriplefrequencyobservations,itshowsthattheresidualvalueofambiguityobtainedbythecombinationofnon-zerocoefficientsbutlongwavelengthsareabout06weeks.Thecorrectambiguityfixedsolutioncanbeobtainedbytheappropriateambiguitysearchmethod,andthiskindofcoefficientscanbeusedinshortbaselineambiguityresolution.

Key words: BeiDousatellitenavigationsystem, triple-frequency, linearcombination, integerlinear-transformation, optimization