从挑高的位置它可以分析或测距，可以下达瞄准设定到火炮，更可以观察弹着据以估算落点修正。
From his elevated station he could estimate or measure range, could transmit sight Settings to the guns, and could observe the fall of shot and estimate corrections known as spots.
分析了空气中超声波测距原理，提出了通过温度测量修正超声波传播速度，提高空气中测量精度的方法。
The principle of ultrasonic measuring distance in the air was analyzed. A method of improving the measurement precision by correcting transmission speed with inspecting temperature was put forward.
本文针对高压输电线距离保护及故障测距中常用的解微分方程算法，提出了一种零序电流相位修正的方法。
The paper proposes a method which corrects the Angle of zero-sequence current in the algorithm of differential equation used for distance protection and fault location of HV transmission lines.
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