双圆锥扫描红外地球模拟器精密光学校准

对地球模拟器进行光学精密校准是保证双圆锥扫描红外地平仪单机地面性能测试的必要前提.采用两台电子经纬仪建立三维坐标实时测量系统,实现对双圆锥扫描红外地平仪地球模拟器的精密光学校准.根据理论设计值作为参考值,与实际测量值进行比较,反复放样测量,进而调整地球模拟器的冷热边界,调校精度可使地球模拟器边界特征点坐标的定位误差控制在0.2 mm 之内.高精度位置控制保证了双圆锥扫描红外地平仪高精度的噪声等效角性能测试,可以保证噪声等效角(3σ)控制在0.07°以下.

The Optical Precision Alignment of the Earth Simulator for Double Conical Scanning Infrared Horizon Sensor

The optical precision calibration constrains the ground testing performance of the double conical infrared horizontal scanning sensor. A real-time three-dimensional coordinate measurement system is established by using two electronic theodolites, and optical precision alignment of the double conical infrared horizontal scanning Earth Simulator is achieved based on above-mentioned system. Actual measured data are compared with the reference theoretical design value, and measuring loft and comparison are carried out repeatedly. Furthermore, the hot and cold boundaries of the Earth simulator are adjusted. These steps can constrain the accuracy of boundary feature point coordinates of the Earth Simulator within error of 0.2 mm. High-precision position control ensures the noise-equivalent-angle precision testing performance of the double conical infrared horizontal scanning sensor, and controls the noise-equivalent-angle (3σ) within 0.07 degree.