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

• 技术交流 • 上一篇    下一篇

空间相机摆扫成像立体定位精度仿真分析

 夏中秋1,2,*, 黄巧林1,2, 何红艳1,2, 杨媛丽1,2, 孙世君1,2, 岳春宇1,2   

  1. 1北京空间机电研究所,北京100094
    2中国空间技术研究院,北京100094
  • 收稿日期:2017-02-15 修回日期:2017-03-10 出版日期:2017-06-25 发布日期:2017-05-18
  • 作者简介:*通讯作者:夏中秋(1985-),男,博士研究生,xiazhongqiu@hotmail.com,研究方向为空间光学遥感器总体设计

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

摘要: 为了验证空间相机摆扫成像立体定位的可行性,考虑成像比例尺变化、摆扫角测量精度、摆扫角稳定度和摆扫角速度等影响因素,建立了以总体设计中影响定位精度的各指标为参数的空间相机摆扫成像几何模型,推导了基于误差传播理论的定位精度计算方法,并对平面定位精度和高程精度进行了仿真,提出了摆扫成像方式条件下提高定位精度的有效措施。结果表明,在成像幅宽较大时,单线阵摆扫成像线阵长度较小情况下和双线阵推扫成像线阵长度较大情况下,可达到相近的定位精度,提高摆扫角测量精度、摆扫角稳定度及时间同步精度,可提高平面定位精度。摆扫成像立体定位精度仿真方法适用于大幅宽成像遥感卫星定位精度指标分配。

关键词: 摆扫成像, 平面定位精度, 高程精度, 仿真分析, 空间相机

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