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1.限踪架的精度及其校准跟踪架是人卫测距仪的一个重要组成部分。由跟踪架所决定的跟踪精度和指向精度,对回波数据率等有直接影响。高精度人卫测距仪的跟踪精度和指向精度很大程度取决于跟踪架的轴系精度、随动和编码器精度。目前美国的高精度人卫测距仪,轴系的正交性和晃动误差约为±1弧秒(均方根值),编码器的精度为18～22位。跟踪精度除天顶附近较差外,一般可达2～5弧秒,在环境温度低于-5℃或高于+20℃时,精度将有所下降。据美国CGC公司说,他们研制的人卫测距仪,其静态指向精度为2.5～3弧秒,跟踪精度为20弧秒,修正后可达5弧秒(经修正后消掉系统误差)。
1. The accuracy of the rack and its calibration rack is an important part of the rangefinder. The tracking accuracy and pointing accuracy determined by the tracking frame have a direct impact on the echo data rate. Tracking accuracy and pointing accuracy of the HRV range finder depend largely on the accuracy of the shafting system, servo and encoder accuracy. At present, the precision gyro range finder in the United States has an orthogonality and shaking error of about ± 1 arcsec (root mean square) of the shafting system, and the accuracy of the encoder is 18 to 22 bits. The accuracy of the tracking is generally 2 to 5 arc seconds, except for near the zenith, and the accuracy will decrease when the ambient temperature is below -5 ° C or above + 20 ° C. According to the American company CGC, the humanoid range finder developed by the United States has a static pointing accuracy of 2.5 to 3 arc seconds, a tracking accuracy of 20 arc seconds, and a correction of up to 5 arc seconds after correction to eliminate systematic errors.