The relative azimuth between projectile and target is the key parameter needed in projectile correction.

弹目相对方位是弹丸修正所需的重要参数。

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It also figures out that the wellbore stability of directional well in the West of Sichuan Basin will be much better than the straight hole with the increasing of the deviation and relative azimuth.

计算结果同时证明，如果在川西深层采用定向井钻井，其井壁稳定性将不会因为井斜角、相对方位角的变化而变差，且地层破裂压力会随井斜角和相对方位角的增加而大幅提高。

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The cost of the system is reduced and the structure is predigested, and it makes the detection system can measure distance, relative velocity and azimuth angle at the same time.

这样做既提高了系统的经济性，简化了结构，又使得系统具有了同时测量目标距离、相对速度和方位角的功能。

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