›› 2012, Vol. 32 ›› Issue (5): 40-46.doi: 10.3780/j.issn.1000-758X.2012.05.007

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LEOSpacecraftOrbitAnomalyDetectionBasedonPredictionDispersion

 ZHANG  Tao-Tao, BAI  Xian-Zong, HAO  Jia, CHEN  Lei   

  1. (CollegeofAerospaceandMaterialsEngineering,NationalUniversityofDefenseTechnology,Changsha410073)
  • Received:2012-02-23 Revised:2012-05-07 Online:2012-10-25 Published:2012-10-25

Abstract: detectionmethodbasedonpredictiondispersionwaspresentedtodealwithLEOspacecraftorbitanomalycausedbymaneuvers,collisions,andatmosphericenvironment.Thesemimajoraxisandinclinationwereselectedasorbitcharacteristicparameters.PredictionvaluesoforbitcharacteristicparameterscanbeachievedbyorbitextrapolationbasedonSGP4modelsecularterm.Afterdatasmoothingprocess,predictiondispersionsequencecanbeobtainedbycalculatingthedifferencebetweenpredictionandcatalogvaluesofthecharacteristicparameters.TheorbitanomalywasdetectedthroughthepredictiondispersiondatabasedonMahalanobisdistance.ThedetectionresultsofTerrain2010isconsistentwiththemaneuverhistorypublishedbyNASA,whichindicatethatthemethodpresentedinthispapercandetectthetimes,epochandtypeoforbitanomalyandcanbewidelyappliedtothespacesurveillanceandspacesituationalawareness.

Key words: Lowearthorbit, Orbitanomaly, Simplifiedgeneralperturbation4modelMahalanobisdistance, Twolineelements, Spacecraft