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时间:2020-03-22
《空间相机摆扫成像立体定位精度仿真分析.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、中国空间科学技术Jun畅252017Vol畅37No畅3117‐125ChineseSpaceScienceandTechnologyISSN1000‐758XCN11‐1859/Vhttp:∥zgkj畅cast畅cnDOI:10畅16708/j畅cnki畅1000‐758X畅2017畅0061空间相机摆扫成像立体定位精度仿真分析1,2,倡1,21,21,21,21,2夏中秋,黄巧林,何红艳,杨媛丽,孙世君,岳春宇1畅北京空间机电研究所,北京1000942畅中国空间技术研究院,北京100094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
2、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;空间相机中图分类号:P228畅1文献标识码:A
3、Simulationandanalysisofstereogeolocationaccuracyofspacecamerabywhiskbroomimaging1,2,倡1,21,21,21,2XIAZhongqiu,HUANGQiaolin,HEHongyan,YANGYuanli,SUNShijun,1,2YUEChunyu1BeijingInstituteofSpaceMechanics&Electric畅ity,Beijing100094,China2ChinaAcademyofSpaceTechnology,Beijing1畅00094,ChinaAbstract:To
4、verifythefeasibilityofthegeolocationofspacecamerabythewhiskbroomimaging,thegeometricmodelofspacecamerabywhiskbroomimagingwasbuiltconcerningthechangeoftheimagescale,thewhiskanglemeasurementaccuracy,thewhiskanglestabilityandthewhiskangularvelocity,takingthefactorsofgeolocationaccuracyintheovera
5、lldesignastheparameters.Thegeolocationaccuracyalgorithmbasedontheerrorpropagationtheorywasderived,thesimulationwascarriedoutandtheimprovingmethodwasputforward.Theresultsshowthatthegeolocationaccuracyofthelargewidthimagery收稿日期:2017‐02‐15;修回日期:2017‐03‐10;录用日期:2017‐05‐18;网络出版时间:2017‐05‐3110:55:1
6、4网络出版地址:http:∥kns畅cnki畅net/kcms/detail/11畅1859畅V畅20170531畅1055畅008畅html倡通讯作者:夏中秋(1985-),男,博士研究生,xiazhongqiu@hotmail畅com,研究方向为空间光学遥感器总体设计:,黄巧林,何红艳,等.空间相机摆扫成像立体定位精度仿真引分用析格[式J].夏中秋,2017,37(3):117125.XIAZQ,HUANGQL,HEHY,etal.Simulationandanalys‐isofstereogeolocationaccuracyofspacecamerabywhiskbroo
7、mimaging[J].ChineseSpaceScienceandTechnology,2017,37(3):117125(inChinese).118中国空间科学技术Jun畅252017Vol畅37No畅3issimilarbetweenthesmallerlinearlengthbythewhiskbroomimagingandthelongerlinearlengthbythepushbroomimaging.Improvingthewhiskanglemeasureme
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