The model of motive system is made in the light of measurements of target bearings, elevation and frequency by passive sonar.

首先以无源声呐对目标的方位角、俯仰角和频率测量为依据，建立动态系统模型。

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Based on the temporal-spatial sequential Maximum Likelihood (ML) algorithm, a new algorithm for estimating the elevation Angle of a target in radar low-angle tracking environment is presented.

在时空级联最大似然算法的基础上，本文结合雷达低角跟踪的特点，提出一种新的目标仰角估计算法。

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During radar tracking target in low elevation, the measuring error of tracked target was removed or reduced with array antenna beam forming technique that can reduce the multi-path error.

当雷达在低仰角跟踪时，降低多径误差的阵列天线波束的形成技术，可消除或降低低仰角跟踪目标时的测量误差。

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To hit a target, they would turn the turret towards the target, set the elevation and select how many barrels of powder to put behind the projectile.

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