Finally they look to see whether a signal had previously been received from the same direction, since a persistent signals is far more promising than a one-time flash in the pan.
最后他们希望看到一个信号在同一个方向中是否曾被接收过，因为持续的信号比起昙花一现的信号更有希望。
The phase array radar USES same signal, and controls the phase of each transmitter signal. So the direction of beam-form can change.
传统的相控阵体制雷达都是采用全相干信号，通过控制各发射单元信号之间的相位使得雷达波束指向发生改变。
The processor can quickly determine the direction of the signal: because the radio waves reach both antennas at the same time, they must be coming from a direction perpendicular to the array.
处理器可以很快决定出讯号的方向，因为无线电波同时抵达两个天线，所以必然来自与阵列垂直的方向。
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