Power on the Receiver, check if the four servos could work correctly.

接通接收机电源，检查一下四个舵机是否均能正确的工作。

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With four or more satellites in view, the receiver can determine the user's altitude.

通过综合比较四个或者更多卫星的传送结果，接收器能够判断出用户所在的海拔高度。

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With four or more satellites in view, the receiver can determine the user's altitude.

通过综合比较四个或者更多卫星的传送结果，接收器能够判断出用户所在的海拔高度。

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