›› 2017, Vol. 37 ›› Issue (2): 117-125.doi: 10.16708/j.cnki.1000-758X.2017.0061

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Simulationandanalysisofstereogeolocationaccuracyofspacecamerabywhiskbroomimaging

XIA  Zhong-Qiu1,2,*, HUANG  Qiao-Lin1,2, HE  Hong-Yan1,2, YANG  Yuan-Li1,2, SUN  Shi-Jun1,2, YUE  Chun-Yu1,2   

  1. 1BeijingInstituteofSpaceMechanics&Electricity,Beijing100094,China
    2ChinaAcademyofSpaceTechnology,Beijing100094,China
  • Received:2017-02-15 Revised:2017-03-10 Online:2017-06-25 Published:2017-05-18

Abstract: Toverifythefeasibilityofthegeolocationofspacecamerabythewhiskbroomimaging,thegeometricmodelofspacecamerabywhiskbroomimagingwasbuiltconcerningthechangeoftheimagescale,thewhiskanglemeasurementaccuracy,thewhiskanglestabilityandthewhiskangularvelocity,takingthefactorsofgeolocationaccuracyintheoveralldesignastheparameters.Thegeolocationaccuracyalgorithmbasedontheerrorpropagationtheorywasderived,thesimulationwascarriedoutandtheimprovingmethodwasputforward.Theresultsshowthatthegeolocationaccuracyofthelargewidthimageryissimilarbetweenthesmallerlinearlengthbythewhiskbroomimagingandthelongerlinearlengthbythepushbroomimaging.Improvingthewhiskanglemeasurementaccuracy,thewhiskanglestabilityandthetimesynchronizationaccuracycanimprovetheplanegeolocationaccuracy.Thesimulationmethodofthegeolocationaccuracyofspacecamerabywhiskbroomimagingisapplicabletotheindexassignmentofthelargewidthimageryoftheremotesensingsatellite.

Key words: whiskbroomimaging, planegeolocationaccuracy, heightaccuracy, simulationanalysis, spacecamera