自旋卫星红外弦宽预测方法研究

Infrared chord width forecasting method of spin-stabilized satellites

在自旋稳定卫星发射过程中,何时安排卫星姿态测量与姿态控制是测控任务的关键。红外弦宽是红外地球敏感器扫过地球的弦角,可以用来实现卫星在空间姿态测量,也是姿态控制的基础。红外弦宽预测方法有多种,通过建立星下点位置和基于地球角的方法来实现预测计算,前一种方法与发射时刻无关,适用于方案设计阶段,后者与发射时刻相关,适用于卫星实时发射阶段。

In the course of spin-stablized satellites launching,it’s a key that choosing the time of attitude measurement and control.Infrared chord width is a chord angle of infrared earth sensor in swept earth,it can be applied to measure satellite attitude,it is also the basic of satellite attitude control.There are many kinds of infrared chord width forecasting methods.This article realizes forecasting calculation through sub-satellite point and earth angle,the former have nothing to do with launching time and it is suitable for project design,the latter is related to launching time and it is suitable for satellite launching.