角秒

MonteCarlo实验表明，在星等误差0.5星等（3σ），位置误差10角秒（1σ）时，该算法的识别成功率接近100%。

Monte Carlo experiment demonstrates that , while the magnitude uncertainty is 0 5 ( 3 σ) and the position uncertainty is 10 arcsec ( 1 σ), the success rate very close to 100 % .

其系统误差小于0.02角秒（峰峰值），随机误差约为±0.03角秒（1σ）。

The systematic error of this method is less than 0.02 arc second ( peak to peak ), and the random error of the measurement within the range of 0 ° to 360 ° is ± 0.03 arc second ( 1 σ) .

两个1/10波长平面度的V形反射镜成直角地装在工件台上，正交度在1角秒之内。

Two 1 / 10 wave V-shaped mirrors are mounted at 90 ° to each other on the stage . The orthogonality is within 1 ar (?)

所选用的CCD芯片像元尺寸为23μm×23μm，像元数384×288，全视场内混色光点列图能量重心偏最大值1.6μm，对应于4.39角秒。

Total number of elements of selected CCD is 384 × 288 , pixel size 23 μ m × 23 μ m. Maximum energy centre deviation in FOV for polychrome spot diagram is 1.6 μ m , corresponding to 4 . 39 ″ .

通过PREM地球模型检测了内核对章动振幅的影响，由此发现内核在亚毫角秒量级上影响主要的章动项，它和当今的观测精度是一致的。

By the PREM earth 's model , the influence of the inner core to the vibration range of nutation is checked . The main solution is that the inner core has effects to the main nutation terms in 0.1 mas , which is coincided with recent observation precision .

子系统可以修正主系统的残余误差，从而实现角秒级的跟踪精度。

The sub-system can adjust the residual errors of the main system .

静态定位精度优于20角秒，比改造前的仪器提高了一个数量级。

The precision of the static orientation is better than 20 arc-seconds , improved by an order of magnitude .

天文测量误差极限：参考星位置对应的最大误差，用角秒表示。

Astrometric Limit : The maximum residual in the place of a reference star , specified in arc seconds .

即使落在各个象限的光斑面积均未到饱和，最大误差也在二十角秒以上。

Even if the area of beam spot in every quadrant isn 't saturate , the maximum error is still above 20 seconds .

研究了步进电机的位置控制与速度控制算法，使系统实际定位精度能达到±1角秒。

Researching internal control of the stepper motor and control algorithm of velocity in order to make the actual systemic orientation precision to reach ± 1 ″ .

详细讨论了天体视位置计算的原理和实现方法，编程实现恒星视位置计算，获得优于角秒的计算精度。

The principle and algorithm of calculating stars ' apparent place is presented in detail and programmed . The program can obtain access to superior arc second accuracy .

对于舰载激光武器系统来说，如果要以角秒级精度快速稳定地跟踪运动目标，首先要保证光电跟踪仪器瞄准线的稳定，即视轴的稳定。

For shipborne laser weapon system , if tracking the moving targets in angle-second precision fast and stably is wanted , the stablilization of line-of-sight ( LOS ) optical tracker must be ensured .

给出了角秒级角度测量时直线的拟合检测算法以及直线标志的成像宽度、长度、与采样方向的角度等参量的选择应满足的条件。

Then the guidelines to measure a rotation angle with high precision of seconds are proposed , which include the method to detect a line and the parameters of a line such as the length , the width and the direction .

通过实验验证，应用该装置可使滚齿机的大周期误差由70角秒减小到30角秒，而且该装置具有结构简单、制造方便、成本低廉等特点。

The experimental results show that the large period errors of the hobber can be reduced from 70 ″ to 30 ″ . In addition , this device has the advantages of simple structure , low cost , being convenient in manufacture , and so on .

1986年1月28日，“挑战者”号航天飞机在卡纳维拉尔角升空73秒后爆炸从，机上所有7名人员全部遇难。

On Jan. 28 , 1986 , space shuttle Challenger exploded 73 seconds after liftoff from Cape Canaveral , killing all seven crew members .

提出了一种全角度并且可以连续测量微小角位移（秒级）的新型光纤角位移传感器。

A novel optical fiber angular displacement which can be used to measure micro angular displacement ( second level ) and all angle continuously is introduced .

设备配有实时监控，圆弧、插补、斜铣、单角综合清角时间为7-15秒。

Equipment with real-time monitoring , arc , interpolation , helical milling , clearance angle , single angle integrated time for7-15 seconds .

本文报告了小尺度河外射电源喷流和内禀偏振位置角分布的统计结果。我们发现，毫角秒喷流分布和内禀偏振位置角分布呈各向异性。

This paper presents our investigations of statistical behavior of the small-scale jet orientations and the intrinsic polarization position angles .

所采用的校准分析技术，可将角位置测试台和角度分解器校准到0.1角秒的精度。

The process has beep used to calibrate an angular positioning table and angle resolver to 0 . 1 arc second .