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1、第32卷第5期2013年10月飛行器測控學(xué)報JoumalofSpacec髓ftTT&CTechnoIogyV01.32No.50ct.2013單錨固站輔助導(dǎo)航星座自主定軌分析’楊力1,郭飛霄2,文援蘭3,李婧1’4(1.信息工程大學(xué)導(dǎo)航與空天目標(biāo)工程學(xué)院·鄭州·450001;2.西安測繪研究所·西安·710054;3.國防科學(xué)技術(shù)大學(xué)航天與材料工程學(xué)院·長沙·410073;4.61363部隊·西安·710054)摘要:我國“北斗”衛(wèi)星導(dǎo)航系統(tǒng)在建設(shè)過程中存在地面跟蹤站無法全球均勻布設(shè)的問題。針對該問題,可采用依靠少量錨固站的星座自主定軌方法解決。通過推導(dǎo)星地測距對衛(wèi)星軌道升交點赤經(jīng)
2、的偏導(dǎo)數(shù),證明了星地測距對升交點赤經(jīng)的可觀性,并分析得出,在經(jīng)度保持不變的情況下,錨固站緯度越大,星地測距對衛(wèi)星軌道升交點赤經(jīng)的偏導(dǎo)數(shù)的模越小,星地測距對升交點赤經(jīng)的修正越差。其后,對單錨固站輔助導(dǎo)航星座自主定軌進行了仿真實驗,在經(jīng)度保持不變的條件下,隨著緯度的增大,星座自主定軌結(jié)果的收斂速度越來越慢。仿真結(jié)果驗證了理論分析,并得出錨固站緯度是影響星地測距對衛(wèi)星軌道升交點修正程度的重要因素的結(jié)論。關(guān)鍵詞:星座整體旋轉(zhuǎn);錨固站;可觀性;自主定軌;導(dǎo)航星座中圖分類號:V448.2文獻標(biāo)志碼:A文章編號:1674—5620(2013)05一0444一05DOI:10.7642/i.iss
3、n.1674—5620.2013一05一0444一05AnalysisofAutonomousorbitDeterminationforNaVigationConste¨ationwithOneAnchorStationYANGLil,GUOFeixia02,WENYuanlan3,LIJin91,4(1.CollegeofNavigationandAerospaceEnginee“ng,InformationandEnginee“ngUniversity,Zhengzhou450052;2.Xi’anInstituteofSurveyingandMapping,Xi’an7100
4、54;3.CollegeofAerospaceandMaterialEngineering,NationalUniversityofDefenseTechnology,Changsha410073;4.PLAUnit61363,Xi’an710054)Abstract:ThispaperproposesautonomousorbitdeterminationwithafewanchorstationsforBeidousatellitenaviga—tionsystemasitisnotpossibletoestablishgroundtrackingstationsevenlya
5、roundthe910befortheconstellation.Itisprovedthatrightascensioncanbeobservedbysatellite—to—stationdistancebydeductionofpartialderivativeex—pressionofsatellite—to—stationdistancetoorbitascendingnode.Analysisshowsthat,while10ngitudeisfixed,thelargerthe1atitudeofananchorstationis,thesmalleristheabs
6、olutevalueofpartialderivativeofsatellite—to—stationdistancetoorbitascendingnode,andthusthepooreristhecorrectionofsatellite—to—stationdistancetoorbitascend—ingnode.Insimulationofautonomousorbitdeterminationforthenavigationconstellationwithoneanchorstation,whilethelongitudefixed,the1argerthe1ati
7、tudeofanchorstationis,thesloweristheconvergencerateofautono—mousorbitdetermination.Simulationresultsverifythetheoreticalanalysis,anditisconcludedthatlatitudeisanim—portantfactoraffectingcorrectionofsatellite—to—stationdistancetoorbitasc