为了测试风云四号气象卫星扫描成像辐射计的扫描镜的动态运动精度，设计了一种高精度动态测角仪。
The high-performance wide-field collimator for dynamic test of FY-4 imager is designed in order to test the dynamic scanning performance of the FY-4 geostationary meteorological satellite imager.
为了测试风云四号气象卫星扫描成像辐射计的扫描镜的动态运动精度，设计了一种高精度动态测角仪。
The high-performance wide-field collimator for dynamic test of FY-4 imager is designed in order to test the dynamic scanning performance of the FY-4 geostationary meteorological satellite imager.
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