›› 2017, Vol. 37 ›› Issue (1): 97-103.doi: 10.16708/j.cnki.1000-758X.2017.0018

• 技术交流 • 上一篇    下一篇

一种敏捷卫星积分时间计算方法

朱剑冰*,张猛,汪路元,袁珺,程博文,赵魏   

  1. 北京空间飞行器总体设计部,北京100094
  • 收稿日期:2016-05-10 修回日期:2016-10-25 出版日期:2017-02-25 发布日期:2016-11-24
  • 作者简介:朱剑冰(1984-),男,硕士,高级工程师,xgdzjb@163.com,研究方向为星载自主任务规划技术

Anintegraltimecalculationmethodforagilesatellite

ZHU  Jian-Bing*, ZHANG  Meng, WANG  Lu-Yuan, YUAN  Jun, CHENG  Bo-Wen, ZHAO  Wei   

  1. BeijingInstituteofSpacecraftSystemEngineering,Beijing100094,China
  • Received:2016-05-10 Revised:2016-10-25 Online:2017-02-25 Published:2016-11-24

摘要: 敏捷卫星成像过程中姿态变化灵活,积分时间变化剧烈,传统卫星积分时间计算模型已无法满足精度要求。因此,提出一种改进的积分时间计算模型,在星地斜距计算和摄影点地速计算两方面作了改进。星地斜距计算时利用地表数字高程模型修正理论的斜距值,摄影点地速计算中增加姿态角速度对卫星本体坐标系角速度矢量的影响,并设计了整个算法在星上数管分系统中的实现方案。最后在星载嵌入式环境下进行了仿真计算,并与地面仿真计算结果进行了比对分析。两者比对偏差在0.01‰以内,可以满足相机成像质量要求。

关键词: 敏捷卫星, 积分时间, 速高比, 数字高程模型, 数管分系统

Abstract: Traditionalintegraltimecalculationmodelscan′tsatisfytheaccuracyrequirement,becauseattitudeflexibilityandintegraltimechangeseverelyduringtheimagingofagilesatellite.Anintegraltimecalculationmodelwasproposedtoimprovetheaspectsofgroundvelocitycalculationofimagingpointandheightcalculationfromsatellitetogroundpoint.Digitalelevationmodelwasadoptedtocorrectheightvalueforheightcalculationfromsatellitetogroundpoint.Andtheattitudeangularvelocity′simpacttoangularvelocityvectorinthesatellitebodycoordinatesystemwasconsideredwhencalculatedthegroundvelocityatimagingpoints.ThewholealgorithmimplementationonOBDHsubsystemwasdesignedandsimulationcalculationundertheembeddedenvironmentwasconducted.Theanalysisresultsmanifeststhemethodcanmeettheaccuracyrequirementofagilesatellitecameraimagingqualitysincethedifferenceiswithin001‰bycomparisonwithSTKsimulationcalculationresults.

Key words: agilesatellite, integraltime, velocity-heightratio, digitalelevationmodel(DEM), OBDHsubsystem