arcsecant

基本解释

The minimum FWHM for (0002) and (1012) XRD rocking curves of these films were 410 arcsec and 1321 arcsec, respectively.
其(0002)和(1012)面X射线摇摆曲线半峰宽最小值分别达410弧秒和1321弧秒，为当前文献中硅(111)衬底上制备的氧化锌薄膜的最小值。
A conclusion is conducted from the final experiments that the errors of spindle deviation within 0.5 arcsec could be maintained using this technique.
应用该技术可将主轴偏角误差控制在0.;5角秒内。
Parallelization tester is used to test the parallel degree of multi-optic-axes system of the large scale photoelectric theodolite with precision less than 0.5 arcsec.
摘要平行度测试仪是检测大型光电经纬仪多光轴系统平行度的设备，要求平行度测试仪的精度要达到0.;5"。
The experiments show that the maximal tracking error of the system is 170 arcsec when integral gain K= 2, and the maximal tracking error is 93 arcsec when integral gain K=4.
实验表明，当积分增益K=2时，系统的最大跟踪误差为170"；当积分增益K=4时，系统的最大跟踪系统误差为93"。
If the night sky of site A is at 20 mag/arcsec2, the brightness of sky there is equivalent to a celestial object of 20 mag filling up a patch of sky of area 1 arcsec x 1 arcsec.
如果甲地方的夜空光度是20等每平方角秒，则可以理解为甲地方夜空的光度，相等于一个20等的天体，填满一角秒乘一角秒大的天空。