单词arc second
网络: 角秒；秒弧；弧秒
Simulation results show that the installation error can be estimated to arc-second degree.
仿真结果表明，该方法对惯导安装误差的标定精度能达到角秒级。
The centroid accuracy of star tracker is the base of other accuracies. Its pointing accuracy is required to reach arc second scale.
高精度星敏感器星点光斑的质心精度是星敏感器整体精度的基础，它需要达到角秒级的量级。