The relativeazimuth 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 relativeazimuth.
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.