FittingParametersDesignforGEOBroadcastEphemeris

doi:10.3780/j.issn.1000-758X.2013.03.007

Chinese Space Science and Technology ›› 2013, Vol. 33 ›› Issue (3): 46-51.doi: 10.3780/j.issn.1000-758X.2013.03.007

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FittingParametersDesignforGEOBroadcastEphemeris

DU Lan^1,3, ZHANG Zhong-Kai¹, LIU Li², HE Feng^2,3, HUANG Hua²

(1College of Navigation & Aerospace Engineering,Information Engineering University,Zhengzhou 450052)(2BeijingGlobalInformationApplicationandDevelopmentCenter,Beijing100094)(3ShanghaiAstronomicalObservatory,ChineseAcademyofSeiences,Shanghai200030)

Received:2012-04-23 Revised:2012-07-16 Published:2013-06-25 Online:2013-06-25

Abstract

Abstract: Thefirstclassofnosingularityvariablesasfittingparameters,alongwiththeorbitalinclinationof5°rotation,caneasilykeepthebroadcastephemerisofGEOconsistentwiththatofMEOandIGSO.However,thesingularityproblemcausedbyorbitalelementsstillexiststosomeextent.A16parameterfittingsetwaspresentedspecificallyforGEOephemerisfitting.Firstly,GEOelementswereintroducedtodescribethemotionofGEO′ssubsatellitepoint.Secondly,thelongitudedriftduetotesseralharmonictermsofgeopotentialwasconsideredinthedesignofperturbedparameters.Fitsimulationsshowthattherootofmeansquaresofuserrangeerrorwith2hdatasetisbetterthan0.01m.

Key words: Broadcastephemerisparameters, Fitting, Nonsingularorbitalelements, GEOelements, Perturbation, GeostationaryEarthOrbit, Navigation satellite

DU Lan, ZHANG Zhong-Kai, LIU Li, HE Feng, HUANG Hua. FittingParametersDesignforGEOBroadcastEphemeris[J]. Chinese Space Science and Technology, 2013, 33(3): 46-51.

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FittingParametersDesignforGEOBroadcastEphemeris

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