红外地平仪视场保护系统

为使风云一号C和风云三号气象卫星红外地平仪不受太阳辐射视场的干扰,研制了一种视场保护系统,对该系统的优缺点、视场确定方案、峰值信号的标定算法进行了研究。分析了红外地平仪在轨运行受太阳辐射干扰影响的严重性,对视场保护系统进行了比较。设计了非扫描机械式视场保护系统——太阳探头,研究了有效的测量装置,测量确定了太阳探头的视场范围,推导了太阳探头信号测量的理论公式。根据太阳穿越大气辐射的理论,给出了标定太阳探头峰值信号的方案,并进行了外场试验。风云一号C气象卫星在轨运行验证表明:太阳探头有效地保护了红外地平仪。因此,太阳探头装置成功应用在卫星姿态测量装置中,研究的太阳探头将同样运用于即将发射的风云三号气象卫星红外地平仪视场保护中。

Covering system for vision field of infrared earth sensor

In order to protect the infrared earth sensor of FengYun No.1C and No.3 weather satellite's from sun radiation,a kind of protecting system of vision field is developed,and its merit and demerit,measuring method and calibration algorithms of peak value are studied.The disturbance to the infrared earth sensor by sun radiation is analyzed and two methods for protecting the vision field of infrared earth sensor are compared. A new covering non-scanning mechanical system,named sun sensor is developed,a kind of valid metrical device is designed to determine vision field range of sun sensor,and to deduce the academic formula of signal measurement.A calibration scheme for sun sensor's signal peak value according to theoretics of atmosphere radiation is provided.The running result of FengYun No.1C weather satellite in orbit shows that the sun sensor can protect infrared earth sensor effectively.The conclution is that the sun sensor can be successfully used to measure satellite gesture and also can be used in the infrared earth sensor of FengYun No.3 weather satellite's in future.