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相对第一代地球同步轨道遥感卫星基于自旋稳定卫星平台的二维成像技术,基于三轴稳定平台成像技术的最大优势在于大幅度提高成像效率、缩短成像周期和多载荷并举。我国基于三轴稳定平台的第二代地球同步轨道气象卫星扫描成像辐射计,采用双扫描镜结合三反射光学系统、辐射制冷器及线列阵探测器,实现了从可见光至甚长波红外波段的成像。面对扫描成像辐射计的恶劣温度环境、极端指向精度、超长运动手寿命等任务要求组合,研制过程中采用了空间光学、精密机械、长寿命运动、电机控制、空间热控、信息处理等综合技术,使仪器实现了恶劣温度环境下的高精度成像。卫星计划于2016年发射,届时将进一步提高我国预报短时天气及突发性灾害的能力。
Relative to the first generation of geosynchronous orbital satellite remote sensing satellite based on spin-stable satellite platform for two-dimensional imaging technology, based on the three-axis stable platform imaging technology, the biggest advantage is to significantly improve imaging efficiency, shortening the imaging cycle and multiple loads simultaneously. China’s second-generation geosynchronous orbit meteorological satellite scanning imaging radiometer based on a three-axis stable platform uses a dual scanning mirror combined with a three-reflection optical system, a radiating cooler and a linear array detector to achieve a visible-light to long-wave infrared band Imaging. In the face of the harsh temperature environment of scanning imaging radiometer, extreme pointing accuracy, long hand life and other mission requirements combination of space optical, precision machinery, long-life movement, motor control, space thermal control, information processing, etc. Integrated technology enables the instrument to achieve high-precision imaging in harsh temperature environments. The satellite project to be launched in 2016 will further enhance our ability to forecast short-term weather and sudden disasters.